Specification PV
| Position | Item | Description | Remarks The comparative specification should indicate any deviation from the technical parameters or functional description of the tender documents. If there is no deviation from the technical specification in columns A-C, please indicate "Yes". Otherwise, describe your special features in this column. |
|---|---|---|---|
| 1 | General Requirements | ||
| 1.1 | PV Plant | System size at least min. 2.000 kWp /must be sufficient to operate the consumer appliances 10h autonomously. - Ground-mounted system with surface orientation towards the south - Battery storage 2 x 3 MWh - Inverter capacity 1800 kVA - AC-coupled system architecture, integrating the PV inverters, BESS/PCS, diesel generator and grid connection on a common AC bus - Transformer 5 MVA, 20 KV - Grid connection Overall site layout: The Bidder must propose a space-efficient overall plant layout, based as far as practicable on a compact rectangular site configuration, integrating the PV field, BESS/PCS containers, diesel generator, transformer, switchgear, control equipment, access routes and other required facilities. The layout must minimise unnecessary land use and cable lengths while maintaining the required safety distances, access for operation and maintenance, ventilation, fire-safety requirements and avoidance of shading, while permitting agricultural use for horticulture. For the purpose of the tender and the preliminary design to be submitted with the offer, the exact site boundaries, available surface area and satellite imagery are not required. The Bidder shall base its preliminary layout on the technical requirements specified in the tender documents and indicate the approximate land area required for the proposed configuration. The final site location and boundaries will be defined at a later stage in coordination with the competent authorities. The plant is expected to be installed on land forming part of the public reserve owned by the Republic of Chad. | |
| 1.2 | Site conditions | The plant is to be erected in the municipality of Pala. Temperatures may vary between 15°C and 50°C and humidity up to 96 %. Temporary condensation Wind speeds: max. 125 km/h during rain storms Snowfall: 0 mm/year, max. 0 mm/day Installation height is 350-400 m above sea level. Seasonal Harmattan winds can cause significant influx of fine Saharan mineral dust and airborne particulates. Soil conditions: No detailed site-specific geotechnical investigation is currently available. The site is agricultural land; lateritic soils with variable fine-grained and gravelly fractions may be expected. The Bidder shall take potential variations in soil conditions into account in the design of the proposed foundation system. Potential soil corrosivity and seasonal variations in soil moisture shall be taken into account for all components in contact with the ground. All components must be designed accordingly! | |
| 1.3 | Power grid | The PV system ist to be fully connected to the local electricity grid. The specifications of the grid operators are to be completely fulfilled technically. Power will be exported via a 20 kV medium voltage power line, built according to standards for medium voltage grids applicable in Tchad. The local grid operates as a permanent island grid and is not interconnected with the national transmission or distribution grid. Power will be supplied to the local distribution network via a 20 kV medium-voltage connection. The system shall be capable of establishing and maintaining the island grid through the grid-forming BESS/PCS, with coordinated operation of the PV plant and diesel generator under control of the EMS/PMS. | |
| 1.4 | Basic design principles | The components offered must be fully functional and compatible with each other. All components and parts that are not explicitly mentioned in this document, but are necessary to ensure a faultless plant layout, installation and professional operation must be offered by the bidder (except for parts that are explicitly excluded from the tender). The inverter configuration shall be sufficiently modular so that failure of a single inverter unit does not result in loss of the entire PV generation system. The detailed design of the PV array, including string configuration, DC cabling, protection, switching, earthing and associated balance-of-system components, shall comply with IEC 62548 or an equivalent internationally recognised standard. | |
| 1.5 | Main components | The quantity and unit prices for the main components (solar modules, inverters, batteries and cables) must be stated in the offer. | |
| 1.6 | Standards and norms | The standards mentioned in this specification may also be offered by equivalent standards. | |
| 2 | Photovoltaic Modules | ||
| 2.1 | PV modules – Agrivoltaic application | PV modules must be suitable for use in an agrivoltaic (Agri-PV) system allowing the cultivation of market-garden crops underneath the PV array. The modules must use monocrystalline silicon technology and must be designed as semi-transparent PV modules, preferably in glass-glass construction. Overall module light transmission / transparency: 20% ± 5%, measured over the total module surface. The bidder must state the module transparency, cell coverage ratio, cell arrangement and module construction and must provide the corresponding manufacturer’s technical documentation. Rated output per module: preferably ≥ 450 Wp. Lower module power may be accepted where resulting from the specified transparency, provided that the required total installed PV capacity is achieved. Power tolerance: 0 to +5 W . Module efficiency: ≥ 20%. Mechanical load resistance: certified for positive load of at least 2,400 Pa. The solar cells must be encapsulated using EVA, POE or an equivalent encapsulation material suitable for long-term outdoor application. Front and rear glazing must consist of tempered, high-transmission solar glass suitable for the proposed semi-transparent module design. Module frame: anodised aluminium or equivalent corrosion-resistant construction; frameless glass-glass modules may also be proposed. Maximum NOCT/NMOT: 45°C. Temperature coefficient of Pmax: ≤ −0.35%/°C. | |
| 2.2 | Certifications and standards | The module complies with the following certifications: - IEC 61 215 : Terrestrial photovoltaic (PV) modules - Type qualification and type approval. - IEC 61 730 : Photovoltaic (PV) modules - safety qualification The tests are carried out by recognised testing laboratories according to ISO/IEC 17025. The manufacturer of the solar modules can prove by a suitable certificate that a permanent quality control and assurance of the production processes takes place in his factory. It must be proven that the standards according to IEC 61215 and IEC 61730 are also adhered to in ongoing production. The certificate itself is issued by an accredited testing institute. The normative requirements IEC 60891 ; IEC 60904-1 ; IEC 61345 ; IEC 61701; IEC/EN 62790:2020, IEC 62941 and IEC 60068-2-68 are fulfilled. CE Declaration of Conformity by the manufacturer is available. A confirmation by a conformity assessment body according to ISO/IEC 17021 is available. CE marking of the solar modules is available. The solar modules are marked accordingly. Weatherproof junction box on the back of the module. The junction box must comply with at least IP 65 and the IEC 62790:2020 standard. PV DC connectors shall comply with IEC/EN 62852 and shall be rated for at least 1,500 V DC | |
| 2.3 | Delivery | The modules must be packed in wooden boxes or equivalent. IEC 62759-1 must be observed with regard to the delivery/shipping of the modules. Vertical Packing Only: Modules must be packed strictly upright (vertically) inside the wooden boxes. No horizontal stacking allowed. Inner Protection: Heavy-duty corner protectors and thick separators must isolate each individual module to prevent friction. Cargo Securing: Boxes must be tightly lashed and wedged inside the container to eliminate any shifting or swaying. Climate Defense: Complete sealing against dust and heavy rain using heavy-duty, UV-resistant tarpaulins.Arrival Inspection: Visual checks and sample Electroluminescence (EL) testing are required upon arrival in Chad to verify zero microcracks. Flash data for each module must be provided as a digital file. | |
| 2.3 | Manufacturer Warranty | Linear performance guarantee for 25 years with maximum degradation coefficient of -0.5%/year Product guarantee for at least 10 years If the rated power of the modules is undershot within the guaranteed warranty period, the modules will be replaced free of charge at the installation site Pala | |
| 2.4 | Please specify: | Brand name, model, type | |
| Area of the cells (LxW) in mm | |||
| Dimensions of the module (LxWxD) in mm | |||
| Weight of module in kg | |||
| Maximum power (Pmax) W | |||
| Maximum voltage ( Vmax) V | |||
| Maximum current ( Ipmax) A | |||
| Maximum reverse current IR [A] | |||
| Short-circuit current (Isc) A | |||
| Open circuit voltage ( Voc) V | |||
| Temperature coefficient for current A/°C | |||
| Temperature coefficient for voltage V/°C | |||
| Temperature coefficient for power %/°C | |||
| Nominal cell operating temperature ( NOCT) | |||
| Maximum system voltage ( Vsmax ) | |||
| Operating temperature ( Min- Max ) °C | |||
| Ambient temperature ( Min - Max ) °C | |||
| Current-voltage characteristics at 25°C and other temperatures and irradiation | |||
| 2.5 | Please enclose with quotation: | Data sheet | |
| Test certificates according to IEC 61215 and IEC 61730 | |||
| Certificates according to ISO/IEC 17025 | |||
| Manufactured according to ISO 9001 and ISO 14001. | |||
| Accreditation of the test centre/institute or test centres (IEC 61215, IEC 61730) according to ISO/IEC 17025 and ISO/IEC 17065 | |||
| CE declaration of conformity of the manufacturer | |||
| Confirmation that upon delivery of the modules, the flasher protocols showing the rated power of all delivered modules are presented and handed over. | |||
| Declaration or explicit confirmation regarding the replacement of the modules according to item 2.3. | |||
| Explanations on packaging and handling of the solar modules with reference to IEC 62759-1 | |||
| 2.6 | EL measurements | The results and images of the flash tests and electroluminescence measurements issued to the serial numbers of the panels must be submitted. All documents and technical documentation submitted must be legible and easily recognisable. | |
| 3 | Structure | ||
| 3.1 | Mounting structure – Agrivoltaic application | Material: Hot-dip galvanised structural steel; aluminium may be used for module rails/clamps and other suitable components. Material combinations must avoid galvanic corrosion. Corrosion protection: All steel components exposed to the environment must be hot-dip galvanised after fabrication in accordance with ISO 1461. Cut edges, drilled holes and damaged coatings must receive suitable corrosion-protection treatment. Fasteners exposed to weather must be corrosion-resistant. Structural design: The mounting structure must be designed in accordance with applicable Eurocodes or equivalent internationally recognised standards, including EN 1990, EN 1991-1-4 (wind actions) and EN 1993 for steel structures, as applicable. Agrivoltaic design: The mounting structure must be specifically designed for dual use of the land for photovoltaic electricity generation and the cultivation of market-garden crops underneath and between the PV module rows. The structural layout must maintain the agricultural usability of the land and must minimise permanent obstruction of the cultivated area by columns, bracing, foundations, cable routes or other structural components. The arrangement must allow safe and practical access for agricultural activities, including soil preparation, planting, irrigation, crop maintenance and harvesting. Wind resistance: The structure, module fixings and foundations/anchors must be designed for the site-specific design wind conditions. The bidder must state the design basic wind velocity, terrain category, pressure coefficients and resulting design loads used. | |
| The Bidder must propose a complete preliminary site layout for the Agri-PV field as part of the offer, showing at least: arrangement and orientation of module tables; module-table dimensions and height; location and spacing of structural supports/columns; row spacing; areas available for agricultural cultivation underneath and between the module tables; agricultural and maintenance access corridors; inverter locations; main cable routes and connection points. The layout must be designed to achieve an appropriate distribution of solar radiation on the cultivated area and to avoid excessive permanent shading. The layout must be coordinated with the transparency of the proposed PV modules, the module inclination and the intended cultivation of market-garden crops. The Bidder must provide a preliminary shading / solar-radiation analysis at crop level, demonstrating the expected distribution of solar radiation underneath and between the PV module rows for the proposed layout. | |||
| Based on the proposed layout, the Bidder must determine and include in the offer all required quantities and lengths of DC and AC cables, connectors, junction/combiner boxes, cable management systems and other electrical balance-of-system components necessary for a complete PV installation. Appropriate installation tolerances and reasonable spare lengths must be included. The location of containers, transformers, switchgear, inverters and other plant equipment must be selected so as to avoid significant shading of the PV array and unnecessary reduction of agriculturally usable land. Foundations and anchoring: see detailed information below: The Supplier must provide all structural loads and reactions, base-plate details, anchor-bolt specifications and all relevant interface drawings and technical requirements necessary for the subsequent detailed design and construction of the reinforced concrete foundations by others. The foundation interfaces and structural arrangement must minimise the loss of cultivable land and must not create unnecessary obstacles to agricultural activities. level and the lowest edge of any PV module or structural component projecting below the module plane must be at least 2.5 m, excluding the height of the reinforced concrete foundation/plinth. The minimum clear horizontal distance between structural posts/supports within areas intended for agricultural access shall be at least 4 m. The arrangement of posts, bracing and other structural components must allow the safe passage and operation of agricultural machinery, including tractors, underneath and between the PV structures. No bracing, cabling or other components may reduce the specified minimum clear passage dimensions. The proposed structure must provide sufficient clearance for crop cultivation, irrigation, maintenance and harvesting underneath and between the PV modules.. | |||
| Inclination: Fixed module inclination must be approximately 10–15°. The final inclination, module-table width and orientation must be proposed by the Bidder during detailed design, taking into account PV energy yield, agricultural light availability, rainwater management, wind loads and the characteristics of the specified semi-transparent PV modules. Module fixing: Clamps and rails must be compatible with the module manufacturer's approved mounting zones and installation instructions. Fixings must not damage the module frame or glass and must not invalidate the module manufacturer's warranty. The Supplier must provide documented evidence of compatibility between the proposed mounting system and the proposed PV modules, such as manufacturer's written approval, approved installation instructions or equivalent documented criteria. Anti-theft protection: PV modules must be fitted with suitable tamper-resistant / anti-theft fasteners requiring dedicated tools for removal. Earthing and bonding: All metallic structural parts and PV module frames must be suitable for equipotential bonding and connection to the overall plant earthing system in accordance with the applicable electrical standards. The Supplier must provide the required bonding points, connectors and technical requirements for integration into the plant earthing system. Rainwater management: The module and mounting arrangement must avoid uncontrolled concentration of rainwater onto limited areas of cultivated land. Where required by the proposed configuration, appropriate gutters, drainage elements or controlled runoff arrangements must be provided. The rainwater management concept must be compatible with the agricultural use of the area and the irrigation concept. Cable management: DC, AC and communication cables associated with the PV field must be routed and mechanically protected so that they do not interfere with agricultural activities. | |||
| Cable trays, conduits, supports and other cable-management components attached to the mounting structure must be positioned so as not to create unnecessary obstacles or hazards for persons working underneath or between the PV module tables. Lightning protection: The mounting structure must be suitable for integration into the overall lightning and surge protection concept of the PV plant. The relevant design and interfaces must comply with the applicable requirements of IEC 62305 Documentation: The Supplier must provide all documentation necessary for the subsequent civil works, installation and commissioning of the supplied Agri-PV mounting system, including at least: structural calculations and design assumptions; general arrangement drawings; detailed structural and assembly drawings; material specifications; corrosion-protection details; design wind loads and structural load assumptions; structural loads and reactions transmitted to the foundations; base-plate and anchor-bolt details; foundation interface drawings and requirements; module mounting and fixing details; installation and assembly instructions; cable-routing and cable-support concept; earthing and bonding interfaces; rainwater management concept, where applicable; preliminary shading / solar-radiation analysis at crop level; all other information reasonably required by the locally contracted civil works and installation contractors for installation of the supplied system. Detailed design and construction of the reinforced concrete foundations, installation of the mounting structure and preparation of final as-built documentation are not part of the Supplier's scope of supply. | |||
| Foundation concept and installation equipment: | The Bidder may propose either reinforced concrete foundations or a driven-pile foundation system, provided that the proposed solution is structurally suitable for the complete Agri-PV mounting system and the specified site conditions. The Bidder must clearly identify and describe the proposed foundation concept in the technical offer. In all cases, complete and detailed installation instructions, structural loads and reactions, installation tolerances, interface drawings and all other technical information required for installation by the locally contracted installation contractor must be provided. Where reinforced concrete foundations are proposed, the Supplier must provide all required base-plate details, anchor-bolt specifications, loads and reactions and other information necessary for the detailed design and construction of the foundations. | ||
| Foundation concept, specifics driven pile system | Where a driven-pile foundation system is proposed, the Bidder shall design and supply the complete pile system on the basis of a minimum pile embedment depth of 2.0 m below finished ground level. The supplied pile length must additionally accommodate the required above-ground structural height, connection details and installation tolerances. No detailed site-specific geotechnical investigation is currently available. For tendering and design purposes, the Bidder shall therefore assume agricultural soil conditions with potentially variable bearing capacity and shall adopt appropriately conservative geotechnical design assumptions. All assumptions used for the structural and foundation design must be clearly stated in the technical offer. The pile system shall be designed with sufficient structural and geotechnical reserve to accommodate reasonable variations in the actual site soil conditions. The Bidder shall state the minimum required axial, pull-out and lateral soil resistance on which the proposed pile design is based. These design requirements shall subsequently be verified on site by pile-driving and/or pull-out tests prior to full installation. | ||
| 3.2 | Ground condition | For the purpose of the preliminary design, the Bidder may assume generally flat to gently undulating terrain typical of the Pala area. Where necessary, site grading and levelling works will be carried out prior to installation. The final layout and foundation design shall be adapted to the actual topographical and geotechnical conditions of the designated site. Ground installation. | |
| 3.3 | Manufacturer Warranty | min. 10 years | |
| 3.4 | Please specify: | Brand name, model, type | |
| Data sheet | |||
| Detailed description of the anti-theft screws and nuts | |||
| Technical description of the substructure | |||
| Description of the lightning protection | |||
| 3.5 | In case of order, to be provided before delivery: | Sectional drawings of the profiles and elevations | |
| Detailed drawings of fixings (interfaces, connections) | |||
| Assembly instructions in French | |||
| 4 | Inverter | ||
| Inverter | The following functions are fulfilled: • Grid-connected photovoltaic inverter for conversion of DC power from the PV array into three-phase AC power. • Parallel operation of multiple inverter units to achieve the required total system capacity. • Multiple independent Maximum Power Point Trackers (MPPT) for optimized operation of the connected PV strings. • Automatic synchronization with the AC grid / microgrid. • Active and reactive power control and adjustable power factor. • Grid monitoring and anti-islanding protection. • Capability for external active-power limitation and remote shutdown. • Communication and control interface for integration into the plant EMS/PMS/SCADA system. The inverter enclosure and exposed components shall have a minimum corrosion resistance class C4 or equivalent suitable for the specified site conditions. | ||
| Capacity | Continuous rated AC power across the entire PV inverter system: min. 1,800 kVA. The bidder may propose a modular configuration consisting of several inverter units. Maximum DC input voltage: min. 1,500 V DC. MPPT operating voltage range must be suitable for the proposed PV module and string configuration. Multiple independent MPP trackers. Three-phase AC output. Nominal output voltage: 400–800 V AC, compatible with the proposed transformer and overall plant architecture. Rated output frequency: 50 Hz. Total harmonic distortion (THDi): max. 3% at rated power. Adjustable displacement power factor: at least 0.8 leading to 0.8 lagging. Maximum inverter efficiency: min. 98.5%. European efficiency: min. 98.0%. MPPT efficiency: min. 99.5%. Inverter capacity, number of inverter units, DC/AC ratio, MPPT configuration and string configuration must be coordinated with the PV modules specified under Position 2. The stated efficiencies (Maximum Efficiency, European Efficiency and MPPT Efficiency) must be measured and verified under rated conditions in accordance with IEC 62891 or EN 50530. The inverter must have a minimum degree of protection of IP65 for outdoor installation. The permissible operating temperature range and the type of cooling (air or liquid cooling) must be stated and must be suitable for the climatic conditions at the site. In addition to the international standards listed, the inverter must comply with the grid connection requirements and grid codes applicable at the place of installation (Chad or the responsible grid operator) at the time of delivery. Corresponding evidence must be provided. | ||
| Handling | Local status and fault indication by graphic display, LEDs and/or web-based/mobile user interface. Menu-guided commissioning, configuration and diagnostics. Ethernet interface and RS-485 and/or equivalent industrial communication interface. Communication via Modbus TCP, Modbus RTU, SunSpec Modbus or equivalent open protocol. Full integration into the plant EMS/PMS/SCADA system. Remote monitoring of operating status, voltage, current, frequency, active and reactive power, energy production, alarms and faults. Manufacturer's commissioning and diagnostic software/tools must be included where required. | ||
| Power protection | Integrated grid monitoring and anti-islanding protection. DC reverse-polarity protection. DC and AC overvoltage / surge protection, minimum Type II SPD on DC and AC side, or equivalent protection coordinated with the overall lightning and surge protection concept. AC short-circuit and overcurrent protection. Insulation resistance / ground-fault monitoring. Residual-current monitoring. Overtemperature and overload protection, including automatic power derating or shutdown. String fault monitoring where applicable. DC disconnection device or equivalent safe means of isolation. Protective earth (PE) connection. External emergency / rapid shutdown capability. | ||
| Certifications and standards | It must comply with the latest applicable editions of the following standards, or internationally recognised equivalent standards: IEC 62109-1 – Safety of power converters for use in photovoltaic power systems – General requirements IEC 62109-2 – Safety of power converters for use in photovoltaic power systems – Particular requirements for inverters IEC 61000-6-2 – Electromagnetic compatibility (EMC) – Immunity standard for industrial environments IEC 61000-6-4 – Electromagnetic compatibility (EMC) – Emission standard for industrial environments Applicable IEC 61000-3 series requirements for harmonic emissions, voltage fluctuations and power quality, according to the rated power and connection characteristics of the inverter IEC 61727 – Photovoltaic systems – Characteristics of the utility interface, where applicable IEC 62116 – Utility-interconnected photovoltaic inverters – Test procedure for islanding prevention measures, where applicable The inverter must be manufactured under a certified ISO 9001 quality management system and ISO 14001 environmental management system. The equipment must bear the CE marking and comply with all applicable EU directives/regulations. The manufacturer must provide the corresponding EU Declaration of Conformity and relevant type-test certificates/reports. | ||
| Outdoor installation: | The inverter must be suitable for permanent outdoor installation under the climatic conditions prevailing at the project site in Pala, Chad. Minimum degree of protection must be IP65. The inverter must be suitable for operation at ambient temperatures of at least 15°C to 50°C and under dusty and seasonally humid conditions. The bidder must state the permissible operating temperature and relative humidity ranges. Any power derating as a function of ambient temperature must be clearly stated in the offer. The proposed inverter configuration must be capable of providing the required total plant output under the specified site design conditions. Where shading, sun protection, additional ventilation or other protective measures are required by the manufacturer to achieve the specified performance and service life, these requirements must be clearly identified in the technical offer and the corresponding equipment must be included in the scope of supply. | ||
| Manufacturer Warranty | min. 5 years The manufacturer’s warranty must be a minimum of 5 years. The bidder must state the scope of the warranty (repair/replacement, spare parts supply, response and on-site times) as well as the options and costs for an optional extension. | ||
| Please specify: | Brand name, model, type | ||
| Rated AC power per inverter | |||
| Number of inverter units | |||
| Total rated AC power | |||
| Maximum DC input voltage | |||
| MPPT voltage range | |||
| Number of independent MPPTs | |||
| Nominal AC voltage | |||
| Rated/max. AC curent | |||
| Maximum and European efficiency | |||
| Communication interfaces and protocols | |||
| Degree of protection | |||
| Operating temperature range | |||
| Delivery | The inverter must be packed for long-distance road transport from Cameroon to Chad, including vibration, shocks, dust, humidity and heavy rainfall protection. Packaging: Robust export-grade wooden crate, reinforced transport frame or equivalent. The inverter must be firmly fixed and protected against mechanical damage, dust and water ingress. Manufacturer’s instructions: Packaging, lifting, handling and transport must strictly comply with the inverter manufacturer’s instructions, including permissible transport orientation, lifting points, centre of gravity and maximum inclination. Cargo securing: The equipment must be adequately lashed and blocked against sliding, tipping and movement during road transport. Shock and tilt indicators must be fitted. Arrival inspection: Packaging, indicators and equipment must be inspected upon arrival in Chad. Any impact, excessive tilting, water ingress or other transport damage must be documented before installation. | ||
| Data sheet | Manufacturer's technical data sheet for the proposed inverter must be provided. | ||
| 5 | Battery | ||
| BESS storage container or containement for 2 x 3 MWh | Turnkey BESS with a total usable energy capacity of min. 2 × 3 MWh (+-5% permissible), as container or other suitable containement The BESS must be suitable for continuous outdoor operation under the specified site conditions, including ambient temperatures of at least 15°C to 50°C and relative humidity up to 96%. Minimum enclosure protection rating: IP55. Battery compartments or dedicated battery enclosures containing battery cells/modules: minimum IP65. The proposed ingress protection and thermal management concept shall be suitable for continuous operation under the specified high-dust, high-temperature and humidity conditions. Appropriate filtration or other measures must be provided for operation in dusty conditions which are prevalent during dry season. Minimum corrosion protection class: C4 or equivalent Featuring lithium iron phosphate (LiFePO₄ / LFP) battery cells, liquid cooling or equivalent active thermal management system, Battery Management System (BMS), fire detection and fire suppression system, DC protection and isolation devices, monitoring and communication equipment. PCS integrated into the storage container or supplied as a fully coordinated part of the BESS system. Usable energy capacity: min. 2 × 3 MWh at Beginning of Life (BoL). Battery DC voltage range: compatible with the proposed PCS, nominally within 900 V to 1,500 V DC for high-voltage configurations. Cycle life: ≥ 6,000 full equivalent cycles at 90% DoD and 25°C until remaining usable capacity reaches 80% of initial usable capacity. Round-trip DC energy efficiency of the battery system: ≥ 92%, excluding PCS and auxiliary consumption, under defined test conditions. Integrated multi-level BMS for monitoring and protection at cell, module/rack and system level, including monitoring of cell voltage, current, temperature, State of Charge (SoC) and State of Health (SoH), and automatic cell balancing. Protection against overvoltage, undervoltage, overcurrent, short circuit, overtemperature and undertemperature. Communication between BMS, PCS and EMS/PMS via CAN, Modbus TCP/IP, RS485 and/or equivalent industrial communication protocol. Automatic thermal management system suitable for the specified ambient conditions and capable of maintaining the battery cells within the manufacturer's permissible operating temperature range. Integrated fire and smoke detection and automatic fire suppression system suitable for lithium-ion/LFP battery energy storage systems, including protection against thermal runaway and propagation between cells/modules/racks. | ||
| Emergency shutdown and external alarm interface. Outdoor containerized solution with corrosion-resistant construction and suitable ingress protection. Battery racks must be supplied and approved/certified by the BESS manufacturer. Full integration into the overall EMS/PMS/SCADA system, including monitoring of SoC, SoH, available charge/discharge power, available energy, DC voltage/current, cell/rack temperatures, alarms, faults and operating status. Battery cells/modules/system must comply, as applicable, with IEC 62619. BESS safety must comply with the applicable requirements of the IEC 62933 series. Transport certification according to UN 38.3 must be provided. Proof of quality assurance system according to ISO 9001 / ISO 14001. ISO 45001 occupational health and safety or equivalent certification. The bidder must state the guaranteed usable energy at Beginning of Life (BoL), usable SoC range, maximum DoD, charge/discharge C-rate, cycle life, remaining capacity at End of Life (EoL), and minimum warranted cumulative energy throughput. Each battery module/rack must be permanently labelled with at least the following data: manufacturer, type/model, nominal voltage, nominal energy/capacity and serial number. Each battery cell/module must be traceable by manufacturer serial number or equivalent production traceability system. | |||
| Protection functions: Short-circuit proof Overload protection Overtemperature protection Lightning and overvoltage protection AC side Compliance with other VDE/IEC regulations (contact protection etc.) Compliance with EMC limits (electromagnetic compatibility) according to EN/IEC 61000-6-2 and EN 61000-6-4 Radio interference suppression (VHF) Output power control of the feed-in inverter (item 1.3) via frequency for overcharge protection of the battery Other normative requirements: IEC 62093:2022 is fulfilled CE declaration of conformity by the manufacturer is available and must be included with the offer. Confirmation by a conformity assessment body in accordance with ISO/IEC 17021 is available and must be included with the offer. CE marking of the battery-charging inverter is available. The battery charging inverters are marked accordingly. Communication point Control cable (e.g. LIYCY paired 2x2x0.25 or comparable type) | |||
| Fire safety UL 9540A and NFPA 855: fire test report and minimisation of the risk of fire spreading to adjacent areas CE marking (IEC 62619 & IEC 62477-1): relating to the safety of battery cells and power electronics Integrated clean gas fire suppression system Provision of a dry water deluge pipework system for the emergency services Protection against deflagration venting in accordance with NFPA 68. Complete and immediate electrical isolation (AC and DC) of the system from the microgrid in the event of any fire safety system activation; External operating temperature: 15 to 50 °C Relative humidity up to 96 per cent. Minimum protection rating IP55 and minimum anti-corrosion treatment class C4. Integration of high-efficiency dust filters. | |||
| Bidirectional Power Conversion System (PCS) 1 MW x 2 | Integrated PCS configured in grid-forming mode with the option of electronically limiting the output power Compliance with IEC 62477-1 and applicable standards for power electronic converter systems. Bidirectional inverter for regulating the charging and discharging of the BESS battery energy storage system Rated output power: 1 MW / 1.25 MVA Rated AC voltage: 400 Vac Mains frequency: 50 Hz or 60 Hz. Total harmonic distortion (THDi): < 3% at Pn for a power factor of > 0.99. Overload capability: ≥110% for at least 10 minutes and ≥150% for at least 10 seconds, or equivalent manufacturer-rated overload capability suitable for grid-forming and black-start operation. DC voltage (battery): 900 V to 1,500 V for high-voltage configurations Maximum DC current: Up to 1,000 A. DC voltage ripple: ≤ 5 %. Maximum efficiency: > 98.5 % (in DC-AC or AC-DC conversion). Cooling: Intelligent forced-air ventilation or liquid cooling. Operating temperature: -20 °C to +50 °C Ingress protection (IP) rating: IP20 for containerised installation, otherwise IP55 Network-enabled operation with communication protocols: Modbus TCP/IP, CAN, RS485. User interface: LCD touchscreen and integration with the overall SCADA system. | ||
| Grid-forming capacity | Grid-forming capability: The PCS must be capable of establishing and maintaining the voltage and frequency of the local AC distribution grid during operation without support from the diesel generator. Black-start capability: The PCS/BESS must be capable of energizing the local AC bus from a fully de-energized condition and establishing stable voltage and frequency without an external AC source. The PCS must be capable of coordinated parallel operation with the diesel generator and the PV inverters under control of the EMS/PMS. The PCS/BESS shall be capable of providing dynamic support to the island grid, including active and reactive power control, frequency and voltage support, compensation of short-term PV power fluctuations and rapidly available operating reserve, under coordination of the EMS/PMS. The Bidder shall state the available short-circuit current contribution of the PCS/BESS, including magnitude, duration and control behaviour, for use in the plant protection and short-circuit coordination study. | ||
| Containerised design / enclosure | The BESS must be supplied as a complete, factory-integrated, transportable and weatherproof system. The system may be installed either in a new, unused ISO shipping container, purpose-converted for use as a BESS enclosure; or in an alternative purpose-built enclosure, provided that the complete system is suitable for containerised transport and handling. Where an ISO shipping container is used, it must be new and unused and must not previously have been used for the transport or storage of goods, chemicals or other materials. The dimensions, internal arrangement and configuration of the enclosure must be proposed by the supplier, taking into account the required battery capacity, PCS and auxiliary equipment, thermal management, fire protection, accessibility for operation and maintenance, and safe transport and installation. The enclosure must be designed for the specified environmental conditions and must comply with the required minimum protection rating IP55 and corrosion protection class C4. The supplier must provide with the technical offer: overall dimensions, weight and transport dimensions of the complete system; general arrangement drawings showing the location of the main components; at least one 3D visualisation and two 2D views of the proposed enclosure; a functional block diagram of the complete BESS, including batteries, PCS, BMS, EMS/PMS interfaces, auxiliary systems and safety systems; an installation and interconnection diagram, clearly showing the AC and DC interfaces, auxiliary supplies, communication interfaces, earthing and external connections; technical description and schematic of the cooling / thermal management and ventilation system; description and arrangement of the fire detection, fire suppression and emergency isolation systems; requirements for foundations, clearances, access, lifting, handling and installation on site. The proposed enclosure concept and dimensions must be clearly identified in the technical offer. Equivalent or alternative enclosure concepts are acceptable provided that the supplier demonstrates their suitability for containerised transport, installation, operation and maintenance under the specified site conditions. | ||
| Delivery | The complete BESS must be suitable for international transport and long-distance road transport from Cameroon to Chad, including vibration, shocks, dust, humidity and heavy rainfall protection. Transport, lifting and handling must strictly comply with the BESS manufacturer’s instructions, including transport orientation, lifting points, centre of gravity, maximum inclination and applicable battery transport requirements. UN 38.3 transport certification must be provided. The container and all external openings, ventilation systems, cable entries, connectors and auxiliary equipment must be adequately sealed and protected during transport. The BESS must be secured against sliding, tipping and excessive movement. Shock and tilt indicators must be provided where required by the manufacturer. Temporary storage: Following delivery, the complete BESS may remain outdoors and uncommissioned for up to 8 weeks before installation. The battery system must therefore be delivered in a condition suitable for transport and subsequent temporary storage for this period, in accordance with the BESS manufacturer’s requirements. The manufacturer must specify the permissible storage conditions and any required preservation measures. Any required inspection, auxiliary power, temperature control, SoC monitoring or adjustment, ventilation or other preservation measures during temporary storage must be clearly specified in the manufacturer’s documentation. Arrival and pre-commissioning inspection: Upon delivery and prior to reception by GIZ, the BESS must be inspected for transport or storage damage, water or dust ingress, corrosion, abnormal battery conditions and alarms. All manufacturer-required inspections and pre-commissioning checks must be performed before energisation. | ||
| Warranty | The battery system must be covered by a minimum warranty of 10 years or 6,000 cycles (whichever comes first) to 80 % remaining usable capacity. The PCS must be covered by a minimum warranty of 5 years. The bidder must specify the exact warranty scope (repair/replacement, spare parts availability, response times and on-site intervention times) as well as options and costs for warranty extension. | ||
| 6 | Cable | ||
| Solar cables | Copper cable with double insulation for up to 1500V, type C2 (high flame resistance), AN3 (high UV resistance) Maximum permissible conductor temperature at least 90°C in continuous use. The standard EN 50618 is fulfilled. Please calculate cable lengths and diameters for a fully functional system operation. Solar DC wiring must be carried out in accordance with IEC 62930:2017. | ||
| Please specify: | Cable type and size, calculated cable length and price per meter. | ||
| DC Cables | Copper Please calculate cable lengths and diameters for a fully functional system operation. Solar DC wiring must be carried out in accordance with IEC 62930:2017. | ||
| Please specify: | Cable type and size, calculated cable length and price per meter. | ||
| AC Cables | Copper Please calculate cable lengths and diameters for a fully functional system operation. The AC wiring must be carried out in accordance with NFC 15-100 and according to the technical specifications for the building. | ||
| Please specify: | Cable type and size, calculated cable length and price per meter. | ||
| Empty conduits | PE cable conduits for burial, double wall (corrugated outside, smooth inside according to standard NF EN 50086-2-4) | ||
| Cable ties | UV-resistant cable ties in all necessary sizes and quantities. | ||
| Accessories | All accessories for proper fastening of the cables under the modules for the entire installation. | ||
| 7 | Other components | ||
| Fuel generator | See page "specification generator" | ||
| Switch cabinet | Compact metal-enclosed, gas-insulated switchgear (GIS/RMU type) suitable for indoor or containerised installation. Rated operating voltage: 20 kV; highest voltage for equipment Um = 24 kV. Rated lightning impulse withstand voltage: ≥ 125 kV. Enclosure protection rating: minimum IP65 for the sealed primary HV compartment; protection of operating/mechanism compartments according to manufacturer standard and installation conditions. Integrated protection comprising motorised circuit breakers with numerical protection relays for transformer and grid feeders. Protection functions must be coordinated with the overall plant and grid protection concept. Suitable for operation without derating at ambient temperatures up to +50°C and under the specified dust and environmental conditions. Internal arc classification IAC AFL, with rated internal arc current and duration not less than the rated short-time withstand requirements of the system, in accordance with IEC 62271-200. Complete with all manufacturer-specific accessories, interlocks, auxiliary contacts, communication interfaces and connection accessories required for subsequent installation. Compliance with IEC 62271-1 and IEC 62271-200, as applicable. | ||
| Step-up Transformer | Minimum 5 MVA step-up transformer (690 V / 20 kV) Hermetically sealed oil-immersed distribution transformer, mineral-oil filled, with ONAN natural cooling, rated power ≥ 5 MVA for continuous operation. Winding conductor material: aluminium. Copper windings are not permitted. Transformation ratio: 690 V / 20 kV, subject to confirmation of the final grid connection voltage by SNE / the competent grid operator. Suitable for continuous outdoor operation under the specified site conditions, including ambient temperatures up to +50°C, dust and high solar radiation. Hermetically sealed, corrosion-resistant tank with external coating suitable for high UV exposure. Equipped with DGPT2-type protection or equivalent, providing monitoring/protection for temperature, pressure and gas generation/oil level, as applicable. Complete with HV/LV terminals, earthing terminals, lifting and handling points, rating plate and standard accessories required for subsequent installation. MV circuit breaker and all required accessories for connection to the 20 kV switchgear The use of aluminium windings must not affect compliance with the specified electrical, thermal, efficiency and short-circuit withstand requirements. Compliance with the applicable requirements of the IEC 60076 series. Manufacturer must provide technical datasheets, routine test reports/certificates, installation and maintenance instructions. The 5.0 MVA rating is intentionally selected to provide sufficient operational reserve for simultaneous PV and BESS operation, reactive power requirements, high ambient temperature conditions and future expansion of the PV generator. The Bidder shall demonstrate the consistency of the proposed transformer rating with the PV inverter and BESS PCS capacities and the intended operating scenarios. All available transformer protection alarms and operational measurements, including at least temperature, pressure and oil/gas-related alarms where provided by the transformer protection device, shall be made available for integration into the plant EMS system through suitable digital and/or communication interfaces. | ||
| Step-up transformer, Option 1 | Transformer configuration: The bidder may alternatively propose a configuration comprising several transformers instead of one central transformer, provided that the proposed solution is technically justified and allows the full required power exchange between the PV plant, BESS/PCS and the distribution network. The proposed configuration shall not impose unnecessary restrictions on the flexible operation of the PV and BESS systems. The bidder shall provide the corresponding sizing calculation, single-line diagram, protection concept and operational philosophy. The total transformer capacity shall be sufficient for the maximum simultaneous operating conditions defined for the plant, taking into account the rated power of the PV inverters, the PCS, auxiliary consumption, applicable derating under site conditions and the EMS-defined operating limits. Where several transformers are proposed, the bidder shall demonstrate that the subdivision does not limit the intended operating flexibility of the plant and shall indicate the maximum permissible power flow for each relevant operating mode. | ||
| Delivery | The transformer must be suitably prepared and protected for international transport and subsequent long-distance road transport to Pala, Chad, including vibration, shocks, dust, humidity, heavy rainfall and repeated handling. Transport, lifting and handling must strictly comply with the manufacturer’s instructions, including lifting points, centre of gravity, permissible transport orientation and maximum inclination. Bushings, terminals, gauges, protection devices and other protruding or sensitive components must be adequately protected against mechanical damage. The transformer must be securely restrained against sliding, tipping and excessive movement during transport. Where required by the manufacturer, shock and tilt indicators must be fitted. Upon arrival, the transformer must be inspected for visible damage, oil leakage, deformation, damaged accessories or abnormal indicator readings before installation. The supplier must provide the applicable transport, handling and temporary storage instructions together with the equipment. | ||
| Control and synchronisation unit (3 sources – island mode) | Central EMS/PMS control and synchronisation system for coordinated operation of the PV plant, BESS/PCS and diesel generator, designed for permanent island operation. The controller must manage source synchronisation, start/stop and connection/disconnection, active and reactive power sharing, frequency and voltage control, BESS charge/discharge and SoC management, PV power limitation and coordinated operation of all three sources. Black-start operation of the BESS/PCS must be supported. The EMS shall continuously supervise transformer loading and dynamically coordinate or limit PV generation and BESS charging/discharging to prevent operation beyond the permissible electrical and thermal limits of the transformer, including during short-duration PCS overload operation. Relevant meteorological data from the plant meteorological station, including at least ambient temperature, shall be made available to the EMS/PMS/SCADA and used for transformer and overall plant monitoring and assessment of thermal operating conditions. Interface with the required motorised circuit breakers, including Open/Closed/Trip status and remote open/close commands. Communication with PV inverters, BESS/BMS, PCS, generator controllers, protection devices, meters and SCADA via Modbus TCP/IP, CAN, RS485 and/or other applicable industrial protocols. Colour touchscreen ≥10", with user interface/configuration available in French, displaying system status, power flows, operating modes, measurements, alarms and events. Control cabinet minimum IP54, suitable for the specified site conditions up to +50°C, with appropriate thermal management/industrial air conditioning to maintain all internal equipment within the manufacturer's permissible operating temperature range. | ||
| Delivery Point | Prefabricated outdoor substation in a weather-resistant enclosure/container, minimum IP54 / IK10, with forced ventilation and industrial air conditioning as required. Thermal management must be designed for the specified ambient temperature, dust and solar radiation and maintain all equipment within the manufacturer’s permissible operating limits. Electrical ratings: Nominal network voltage 20 kV, subject to confirmation by SNE / the competent grid operator in Chad; equipment must be selected for the final confirmed voltage. Highest voltage for equipment (Um): 24 kV up to 22 kV networks; 36 kV for 33 kV networks, as applicable. Busbar current ≥400 A; short-time withstand current ≥12.5 kA/1 s, or higher according to the final short-circuit study/grid requirements. Configuration: MV feeder cells with VPIS; metering cell with 3 CTs (class 0.2S) and 3 VTs (class 0.2) suitable/approved for energy billing and separate protection cores/windings where required; general protection cell with motorised circuit breaker and interlocked earthing switch; auxiliary-services cell for protection and supply of the auxiliary transformer and associated equipment. Protection: Multifunction numerical relay providing at least ANSI 50/51, 50N/51N, 27/59, 81U/81O and 81R where required. Battery-backed 24 or 48 Vdc auxiliary supply with ≥8 h autonomy for protection, signalling, communications and circuit-breaker operation. The Supplier shall determine the total auxiliary power demand of the supplied plant equipment and shall size the auxiliary power supply accordingly, including a minimum design reserve of 20%. The calculation shall include all relevant continuous and intermittent auxiliary loads and shall be submitted as part of the detailed engineering documentation. SCADA/remote control: RTU supporting IEC 60870-5-104, DNP3 and/or Modbus TCP/IP, compatible with the overall EMS/PMS/SCADA. Minimum signals: TS: breaker and earthing-switch positions, protection trip, DC supply fault, intrusion and temperature alarms; TM: active/reactive power, phase/line voltages, phase currents, frequency and energy; TC: main circuit-breaker open/close. Active-power limitation must be transmitted through the EMS/PMS/Plant Controller where applicable. Grid connection: Final voltage and equipment ratings, short-circuit level, CT/VT ratios/classes, protection functions/settings, metering, communication interfaces and point of common coupling must comply with SNE / competent grid-operator requirements and be confirmed during detailed engineering. The Contractor must coordinate the protection and metering concept with the grid operator and implement requirements resulting from the grid-connection, short-circuit and protection-coordination studies. Where no specific national/utility requirements exist, the specified IEC standards must apply. Standards: IEC 62271-200, IEC 62271-202 IEC 62271-102 where applicable to disconnectors and earthing switches, and other applicable IEC standards. and other applicable IEC standards. CE marking and Declaration of Conformity must be provided. | ||
| Transport and handling: The complete substation and MV equipment must be suitably packed and protected for international transport and long-distance road transport from Cameroon to Chad, including shocks, vibration, dust, humidity and heavy rainfall. Packaging, transport, lifting and handling must strictly comply with the manufacturer’s instructions, including lifting points, centre of gravity, permissible orientation and maximum inclination. Sensitive switchgear, protection, metering and communication equipment must be adequately secured and protected against mechanical damage, dust and water ingress. The equipment must be securely lashed and blocked against movement during transport. Upon arrival, the equipment must be inspected for transport damage and all manufacturer-required checks must be completed before installation and energisation. | |||
| Earthing system | Supply of all principal components required for the earthing and equipotential bonding of the PV plant, BESS, PCS, transformers, MV delivery point, supporting structures, equipment enclosures and other exposed conductive parts. Supply must include suitable copper earthing conductors/tape, earth rods/electrodes with clamps and connectors, equipotential bonding conductors, corrosion-resistant connection accessories and earth inspection/test pits. Components must be suitable for the specified environmental conditions and comply with IEC 60364-5-54, IEC 61936-1 and IEC 50522, as applicable. Final configuration, number and arrangement of earth electrodes and conductor routing must be determined during installation based on site soil resistivity measurements, fault-current levels and the final earthing design. The supplier must provide technical data and installation instructions for all supplied components. | ||
| Lightning Proctection | Supply of the principal components required for a coordinated Lightning Protection System (LPS), including suitable air-termination devices, down-conductor components, connection accessories and integration with the earthing system. Coordinated Surge Protective Devices (SPDs) must be supplied for AC, DC, auxiliary power, communication and control circuits as applicable. SPD type and rating (Type 1, Type 1+2 or Type 2) must be selected according to the equipment and intended installation location. Components must comply with IEC 62305 and the IEC 61643 series, as applicable. Final positioning and configuration of the external LPS must be determined during detailed design/installation. | ||
| Monitoring | Supply of the monitoring and communication equipment required for monitoring of PV inverters, BESS/BMS, PCS, diesel generator, MV delivery point, protection devices and meters, and for subsequent integration into the EMS/PMS/SCADA system. Monitoring must support at least active/reactive power, energy, voltage, current, frequency, power factor, operating status, alarms and faults; for the BESS also SoC, SoH, available energy, charge/discharge power, temperatures and BMS alarms. The supplied solution must support historical data, trends, graphs, alarm/event logs and energy reports and provide a user-friendly web-based interface and/or mobile application with configurable user access levels. Standard industrial communication interfaces/protocols such as Modbus TCP/IP, IEC 60870-5-104, CAN and/or RS485 must be provided as applicable. All required communication interfaces, gateways, software/licences and technical documentation necessary for subsequent installation and integration must be included. Local monitoring must not require permanent internet access or mandatory paid cloud services. | ||
| CCTV or protection system | The Supplier shall provide an outdoor CCTV and intrusion alarm system suitable for permanent operation under the climatic conditions of the project site in Pala, Chad (ambient temperatures 15 °C to 50 °C, relative humidity up to 96 %, high dust loads during the Harmattan season). Scope of supply : Outdoor IP cameras (minimum 4 MP, IR night vision ≥ 50 m, WDR, IP66 / IK10). At least one of the cameras shall be a thermal or dual-sensor (visible + thermal) camera to ensure reliable night-time and low-visibility detection. Magnetic contacts / door and window sensors on all doors and accessible openings of critical equipment enclosures (BESS containers, diesel generator canopy/control cabinet, MV switchgear, transformer enclosure, EMS/control cabinet). Sensors shall trigger an alarm in case of unauthorised opening. Local Network Video Recorder (NVR) with minimum 30 days continuous recording capacity. Local recording shall function independently of any internet connection. Alarm control panel with local audible/visual alarm (siren + strobe) and remote notification capability (GSM/4G). Integration of all intrusion and system alarms into the plant EMS/PMS/SCADA via open industrial protocol (minimum Modbus TCP or equivalent). Independent power supply: The complete CCTV and alarm system (cameras, NVR, alarm panel and sensors) shall be powered by a dedicated autonomous solar power supply consisting of:, PV module(s), Charge controller , Battery storage with sufficient capacity for continuous 24/7 operation (minimum 3–4 days autonomy without sun) All necessary mounting, cabling and protection components The solar power supply shall be sized and designed for the specified site conditions (temperature, dust, high solar radiation) and shall keep the system fully operational during island mode and black-start of the mini-grid. Environmental requirements All outdoor components shall have a minimum degree of protection IP66 and impact resistance IK10. Housings and mounts shall be corrosion-resistant and suitable for high UV exposure and dusty environments. Cabling shall be mechanically protected. All components shall be packed for long-distance road transport (vibration, dust, humidity, heavy rainfall). Minimum warranty: 3 years on the complete system including the solar power supply. Warranties must be assignable to GIZ and project partners. Installation and commissioning are not part of the Supplier’s scope. Full installation, configuration and integration documentation in French or English shall be provided. Remote technical support during integration into the EMS/PMS shall be included where reasonably required. | ||
| Please specify: | Brand, model and type of cameras Number of cameras (total) and confirmation of thermal/dual-sensor camera Resolution, IR range NVR recording capacity (days) Type and number of door/window sensors Alarm panel model and communication interfaces Integration protocol with EMS/PMS Details of the autonomous solar power supply (PV power, battery capacity, autonomy days) Degree of protection (IP/IK) and operating temperature range | ||
| Meteorological station | The Supplier shall provide a compact meteorological station suitable for continuous outdoor operation under the specified site conditions and for integration into the plant EMS/PMS/SCADA system. The station shall measure, as a minimum, solar irradiance, ambient temperature, relative humidity, wind speed, wind direction and precipitation. The proposed sensors shall be suitable for performance monitoring of the PV plant and shall comply with applicable IEC standards or equivalent recognised standards. The meteorological station shall include all required sensors, mounting equipment, signal conditioning, data acquisition and communication interfaces. Data shall be made available to the EMS/PMS/SCADA system via RS485/Modbus TCP or another suitable open industrial communication protocol. The station shall be equipped with an independent power supply, preferably based on a dedicated small PV module and battery system, sized to ensure continuous operation during plant outages and black-start conditions. The Supplier shall provide the technical data sheets, measurement ranges, accuracies, installation requirements, power-supply concept and calibration information for all proposed sensors. | ||
| 8 | erased | ||
| 9 | Documentation | ||
| The following documentation, in English and french, must be supplied in electronic form for all components of the system after the order has been placed: | Assembly instructions for the entire system. Overview for an installer on site, showing which components are connected to each other and how. This overview also refers to the corresponding installation instructions and assembly instructions for the individual components. | ||
| Circuit document | |||
| Description of the components | |||
| Wiring diagrams | |||
| Assembly instructions, installation instructions | |||
| Commissioning instructions | |||
| Operating instructions | |||
| Maintenance instructions | |||
| Error analysis and troubleshooting suggestions in the event of a malfunction | |||
| 10 | Material Delivery DPU Douala Seaport, Cameroon | ||
| All material must be delivered DPU Douala Seaport, Cameroon, latest 8 months after order. The Bidder shall quote delivery of all material DPU Port of Douala, Cameroon, at the agreed container terminal / handover point (Incoterms® 2020), no later than eight (8) months after the order. The Supplier shall arrange and bear all costs and risks associated with the transport of the goods, including the unloading (discharging) of the containers from the vessel onto the quay or terminal ground at the Port of Douala. All goods shall be shipped in Shipper-Owned Containers (SOC). The containers shall remain sealed as transport units at the Port of Douala and shall subsequently be transferred to road transport for onward transportation to Chad. Unpacking or unloading of the goods from the containers at Douala is not foreseen.Delivery under DPU shall be completed when the SOC containers have been unloaded from the vessel and placed at the disposal of the Buyer or its designated freight forwarder at the agreed terminal ground, ready for takeover and onward transport.The Buyer or its designated freight forwarder shall thereafter be responsible for the onward transport from Douala to Chad, including the loading of the SOC containers onto the truck/trailer used for the onward journey.The Supplier shall coordinate the arrival and handover, including the exact handover point at the port of Douala, with the freight forwarder designated by the Buyer and shall provide all shipping and transport documents required for customs clearance, takeover and onward transport. | |||
| Please specify: | Dimensions (LxWxH), weight (kg) incl. packaging for sea and land shipment (truck and rail) | ||
| 10b | Material Delivery DAP Pala (optional) | All material must be delivered DAP Pala, instead of DPU Douala Seaport latest 9 months after order. | |
| Packaging | All equipment must be packed and protected for international and intensive long-distance road transport, including vibration, shocks, dust, humidity, heavy rainfall and repeated handling. Packaging, transport orientation, lifting and handling must comply with the respective manufacturer’s instructions. The packed dimensions, weight and handling requirements of all major components must be compatible with the logistical constraints of the transport route from the Port of Douala via Koutéré and Moundou to Pala. Any equipment-specific transport, handling and temporary storage requirements specified elsewhere in these technical specifications must additionally apply. | ||
| Transport monitoring | For sensitive and high-value equipment, including in particular BESS containers, PCS units, transformers and other equipment for which the manufacturer specifies transport-related shock, tilt, temperature or humidity limits, the Supplier shall provide suitable transport monitoring devices in accordance with the manufacturer's transport requirements. Where applicable, visible shock and/or tilt indicators shall be installed on the relevant packages or equipment. Digital data loggers for shock, temperature and/or relative humidity shall be provided where required by the equipment manufacturer or where necessary to verify compliance with specified transport and storage conditions. The monitoring devices shall remain active during transport to the final destination in Chad. Recorded data shall be made available upon delivery and, where applicable, evaluated during the inspection of the goods at destination. The Supplier shall provide the applicable transport and storage limits specified by the equipment manufacturer together with the shipping documentation. | ||
| Quality Inspection Prior to Shipment | Prior to shipment, all equipment and materials shall be subject to a quality and conformity inspection to verify compliance with the Contract, the Technical Specifications and the approved technical documentation. The inspection shall be carried out by the Purchaser and/or by an independent inspection body appointed by the Purchaser. The costs of an independent inspection body appointed by the Purchaser shall be borne by the Purchaser. The Supplier shall notify the Purchaser sufficiently in advance, and at least 15 working days before the proposed inspection date, when the goods are ready for inspection. The Supplier shall provide the Purchaser and/or the appointed inspection body with reasonable access to the goods, the manufacturer's premises, warehouse or other relevant inspection location, as well as to all documentation required for the inspection. The inspection shall normally take place at the manufacturer's premises, the Supplier's warehouse or another location where the goods are consolidated and accessible prior to final shipment. The Bidder shall indicate in its Technical Offer the anticipated manufacturing and/or inspection location(s) of the principal equipment. The quality and conformity inspection shall include, as applicable: - verification of manufacturer, type, model, quantities and main technical characteristics of the supplied equipment; - verification of serial numbers and equipment identification, where applicable; - verification of conformity with the Technical Specifications and approved technical documentation;-- - review of applicable certificates, manufacturer's test reports, Factory Acceptance Test (FAT) records and other quality documentation required under the Contract; - visual inspection for apparent defects, damage, corrosion or other deficiencies; - verification of completeness, including accessories, spare parts, special tools and required documentation; - verification of appropriate packaging, preservation, marking and protection for international maritime transport, repeated handling and subsequent long-distance road transport to the final destination in Chad. For equipment or materials supplied in large quantities, including PV modules, cables and mounting-system components, the physical inspection may be performed on an appropriate representative sampling basis. Factory Acceptance Tests, routine tests and other manufacturer-specific tests required under the Technical Specifications remain the responsibility of the Supplier and/or manufacturer. The corresponding test reports and certificates shall be made available to the Purchaser and/or the appointed inspection body as part of the inspection documentation. | ||
| The Supplier shall provide all reasonable assistance necessary for the inspection. Any non-conformities or deficiencies identified during the inspection shall be corrected by the Supplier prior to shipment and at no additional cost to the Purchaser. The goods shall not be shipped before completion of the required inspection and written release for shipment by the Purchaser. The inspection, attendance or non-attendance of the Purchaser or its appointed inspection body, as well as any release for shipment, shall not constitute final acceptance of the goods and shall not relieve the Supplier of any contractual obligations, warranties or liabilities regarding the conformity, completeness, quality, performance or condition of the supplied goods. Any additional certificates, inspections or conformity documentation required under the applicable import regulations of the Republic of Chad at the time of shipment shall remain subject to the applicable legal and customs requirements. | |||
| 10b | Customs clearance (by giz) | ||
| Customs clearance (by giz) | Customs clearance will be done by giz. | ||
| 10c | Domestic Material Transport (by giz) | ||
| Domestic Material Transport (by giz) | Domestic transport will be done by giz. Please calculate 30 days after customs clearance. | ||
| 11 | Service on site | ||
| Please enclose with the offer: | Address of the service centre on site, in the country, in the region | ||
| Installation, commissioning and technical documentation | Installation and commissioning are not included in the scope of supply and will be carried out separately by the purchaser or by a third-party contractor responsible for the installation. | ||
| The Supplier must provide all manufacturer-specific installation, connection, configuration and commissioning instructions required for the proper installation and operation of the supplied equipment, including drawings, wiring diagrams, interface descriptions, communication protocols, parameter/settings requirements and operation and maintenance manuals. All standard accessories, connectors, cables, communication interfaces, mounting/fixing accessories and other manufacturer-specific components required for installation and commissioning of the supplied equipment must be included in the supply. Site-specific civil works and installation materials not forming part of the supplied equipment are excluded. The Supplier must clearly specify any site preparation, handling, storage, installation and commissioning requirements to be fulfilled by the installation contractor. | |||
| Expert days and field visits for technical support services | For the services described under Inspection and commissioning support, Site verification and detailed engineering support, Review and approval of installation execution plan, Participation in provisional acceptance of the installation, and On-site technical support during installation and commissioning, the Supplier shall plan and budget sufficient expert input and field visits to ensure proper implementation of these services. For pricing purposes, the financial offer shall include an allowance of up to 90 expert working days on site for qualified engineers, as well as up to 30 expert working days of remote technical support. The Supplier shall plan the number, duration and timing of the required field visits according to the implementation needs of the project. The actual deployment shall be determined according to project needs and may include several field missions as well as remote support. Only expert days actually requested and performed shall be invoiced, unless otherwise agreed in the contract. The quoted price shall include all costs associated with the deployment of the experts, including international and domestic flights, accommodation, local transport, meals/per diem and any other travel-related expenses. No additional travel or subsistence costs shall be payable beyond the quoted amount. The 60 expert working days per expert are separate from the expert days allocated for training. | ||
| Please specify: | Please specify the number of experts and days you are planning for this assignment. Please specify the number of people, qualifications, duration, and daily rate for the services to be included. The schedule of services (Leistungsverzeichnis) must state the price per man-day for additional tasks that may be commissioned by the client. | ||
| Inspection and commissioning support | Upon delivery, the equipment must be inspected for completeness, conformity with the technical specifications and visible transport damage. Relevant factory test certificates and quality documentation must be supplied with the equipment. The Supplier must provide the required commissioning procedures, test protocols and acceptance criteria for subsequent commissioning by the installation contractor. Where manufacturer participation or authorisation is required to maintain the equipment warranty, this must be clearly stated in the offer. The Supplier must provide remote technical support during installation and commissioning, where reasonably required for manufacturer-specific configuration, troubleshooting and verification. | ||
| Site verification and detailed engineering support | After contract award, the Supplier shall carry out an on-site verification visit to the selected project site(s) in order to confirm the actual site conditions relevant to the supplied system. Based on the verified site conditions, the Supplier shall prepare and submit the detailed engineering documentation required for installation of the supplied equipment, including final layout drawings, equipment interfaces, cable routing and connection requirements, installation tolerances and all other technical information required by the locally contracted installation contractor. The Supplier shall also provide a consolidated list of all components, civil works, auxiliary materials and installation services that are required for a complete and functional installation but are not included in the Supplier’s scope of supply. The detailed engineering concept shall include an overall fire protection concept for the complete hybrid power plant, covering the PV system, BESS/PCS, diesel generator, transformer, switchgear, control equipment and associated auxiliary systems. The concept shall identify the relevant fire risks, required prevention, detection, alarm, suppression and emergency isolation measures, as well as the interfaces between the supplied equipment and the separately contracted installation works. The Supplier shall provide all manufacturer-specific fire-safety requirements and interface information necessary for the installation contractor to implement the overall fire protection concept in accordance with applicable standards and recognised good practice. The final Lightning Protection System design and required lightning protection level shall be determined on the basis of a lightning risk assessment in accordance with IEC 62305-2, taking into account the site conditions, plant layout and equipment to be protected. The final earthing and equipotential bonding design shall be determined on the basis of site soil resistivity measurements, fault-current levels, system configuration and applicable protection requirements, in accordance with IEC 60364-5-54, IEC 61936-1 and IEC 50522, as applicable. | ||
| Review and approval of installation execution plan | The detailed execution and installation plan shall be prepared by the locally contracted installation contractor on the basis of the Supplier’s technical documentation, structural design criteria, interface requirements and installation instructions. The Supplier shall review this execution plan and confirm its compatibility with the supplied system before installation starts. The review shall cover, in particular, the structural arrangement, foundations or pile interfaces, anchoring, installation tolerances, module fixing, cable routing, earthing and other relevant system interfaces. Any required corrections or additional measures shall be communicated in writing prior to approval for execution. | ||
| Participation in preliminary reception of the installation | The Supplier shall participate in the provisional acceptance of the installed system through two duly delegated engineers with appropriate technical competence for the supplied equipment and mounting system. The Supplier’s representatives shall verify the conformity of the installation with the Supplier’s approved execution plan, technical documentation, installation instructions and interface requirements. The Supplier shall not have a formal veto right over the provisional acceptance. However, any technical reservation raised by its representatives regarding the safety, structural integrity, compatibility, correct installation or operability of the supplied system shall be formally recorded in the acceptance report and duly addressed by the installation contractor before final closure of the corresponding acceptance item. In case of a serious technical concern affecting safety, structural integrity or the risk of damage to the supplied equipment, the issue shall be escalated for joint technical resolution before the relevant part of the installation is accepted. | ||
| On-site technical support during installation and commissioning | The Supplier shall provide on-site technical support during the installation and commissioning of the supplied equipment. For this purpose, the Supplier shall make available suitably qualified technical experts familiar with the supplied system and manufacturer-specific installation, configuration and commissioning requirements. The experts shall provide technical guidance on matters directly related to the supplied equipment, including installation requirements, interfaces, configuration, testing and commissioning procedures. Any observations, reservations or requests for corrective action identified by the Supplier’s experts during installation or commissioning shall be communicated to the separately contracted supervision contractor, who shall coordinate any required follow-up with the installation contractor. The Supplier’s role shall remain limited to technical support concerning the supplied system. Construction supervision and monitoring of the installation works shall be carried out by the separately contracted supervision contractor. Responsibility for execution of the works, site management, occupational health and safety, compliance with applicable installation requirements and overall installation quality shall remain with the installation contractor. | ||
| Documentation: The supplier must provide complete technical documentation required for transport, installation, commissioning, operation and maintenance of the supplied equipment. This must include, as applicable, wiring and interconnection diagrams, single-line diagrams, functional diagrams, terminal and interface plans, communication diagrams, equipment layouts, installation instructions and connection requirements. The documentation must clearly identify all interfaces and connection points required for integration of the supplied equipment into the PV-battery-diesel mini-grid. As-built documentation of the installation is not part of the supplier's scope. | |||
| After-sales service and technical support: The bidder must describe the after-sales service and technical support available for the supplied equipment, including at least: availability and procurement of spare parts; replacement of defective components and spare parts; remote fault diagnosis and troubleshooting; repair services; technical support during the warranty period and after expiry of the warranty; expected response times and, where applicable, availability of local or regional service personnel. The bidder must indicate the location of the nearest available service facility or qualified service partner and the expected availability period for essential spare parts. | |||
| The supplier must deliver the complete equipment in accordance with the delivery terms and delivery schedule specified in the contract. Installation of the equipment and domestic transport to the installation site are not part of the supplier's scope of supply. Installation and commissioning will be carried out separately by a locally contracted installation company. The timing of on-site technical assistance and training must be coordinated with GIZ following delivery of the equipment and confirmation that the installation site is ready. | |||
| The bidder must include flight, accommodation, catering and domestic travel for its staff in its bid. | |||
| 12 | Warranty | ||
| min. 2 years | On the entire system provided. Fully according to GIZ General Purchase Conditions (GPC) 2023. The claims arising from the product and system warranties apply in addition to the claims for defects in accordance with GIZ GPC 2023. For individual components, longer warranty periods apply if described. The manufacturers warranties must not be invalidated solely because onward transport from the contractual delivery point is performed by a third-party logistics provider, provided that transport, handling and temporary storage are carried out in accordance with the manufacturer’s documented requirements. The Supplier must provide all applicable transport, handling and storage instructions before shipment. The Supplier must clearly state any transport, handling or storage conditions that may affect the warranty, including permissible inclination, shock limits, temperature limits and storage duration. | ||
| Place of validity | All guarantee and warranty conditions apply at the locations of the installed PV-Systems. Even if the material was handed over at other locations. | ||
| Guarantee assignment declarations | All warranties must be assigned to GIZ and project partners by declaration. This declaration must be signed and stamped by each manufacturer. | ||
| 13 | Training | ||
| Present Training | The Supplier must provide on-site technical training and installation support for the local personnel responsible for the installation, with the objective of transferring practical knowledge on the correct installation, configuration, operation and basic maintenance of the supplied equipment. For this purpose, the Supplier must make available up to two suitably qualified technical experts for a maximum of 15 expert working days per expert. Each expert must meet the following minimum qualification requirements: Master’s degree or equivalent university degree in Electrical Engineering, Power Engineering, Energy Engineering or a closely related field; five (5) years of relevant professional experience in electrical power systems, renewable energy systems, battery energy storage systems and/or comparable electrical installations; two (2) years of demonstrated practical experience in on-site supervision or technical oversight of electrical installation works and in the practical instruction, training or coaching of installation personnel; practical experience with the installation, configuration, testing and/or commissioning of equipment comparable to the equipment offered under this contract. The Supplier’s experts must accompany and observe the installation and commissioning activities and provide technical guidance on manufacturer-specific requirements, recommended installation practices, configuration and testing. Their presence must serve the purposes of technical assistance, quality observation and knowledge transfer and must not constitute supervision, direction or acceptance of the installation works. Responsibility for the execution of the works, site management, occupational health and safety, compliance with applicable installation requirements and the final quality of the installation must remain entirely with the installation contractor. Independent supervision and monitoring of the works shall be carried out separately by the contracted supervision consultant. The training must combine practical on-the-job instruction during installation and commissioning with structured instruction on the main equipment, system architecture, operating principles, safety requirements, routine maintenance, fault identification and troubleshooting. Relevant training materials and manufacturer documentation must be provided to the participants in French or, where manufacturer documentation is not available in French, in English. | ||
| Please specify: | Please specify the number of trainers and days you are planning. Please specify the number of people, qualifications, duration, and daily rate for the training to be included. The schedule of services (Leistungsverzeichnis) must state the price per man-day for additional training days. | ||
| 14 | Maintenance (optional) | ||
| 2 years after commissioning | |||
| Please specify: | Please provide details regarding the concept, scope, and costs. This should list all costs prescribed or recommended by the manufacturer for maintenance during the first two years operating. |
Specification Generator
| Diesel Generator Set – Hybrid PV-BESS Minigrid | Remarks The comparative specification should indicate any deviation from the technical parameters or functional description of the tender documents. If there is no deviation from the technical specification in column A, please indicate "Yes". Otherwise, describe your special features in this column. |
|---|---|
| The diesel generating system must be specifically designed and rated for operation as part of a solar photovoltaic (PV) – battery energy storage – diesel hybrid minigrid. It must be fully compatible with the PV inverter system, the battery power conversion system (PCS) and the central Energy Management System (EMS)/power management system (PMS) and must be suitable for frequent automatic start/stop operation, variable loading and extended partial-load operation. | |
| Rated power and electrical characteristics | |
| Total continuous rated active electrical power: min. 600 kW. | |
| Total continuous rated apparent power: min. 750 kVA Prime Power at power factor 0.8, available under the environmental conditions specified in the Site Conditions – PV Plant. The generator’s auxiliary/self-consumption shall be taken into account. The bidder shall provide a corresponding sizing and derating calculation demonstrating compliance with the required net available power. | |
| The required capacity may be provided by one generator set or by several generator sets operating in parallel. Where several units are proposed, they must provide automatic sequencing, synchronisation and load sharing and must operate as one coordinated generating system under control of the EMS/PMS. The generator system must be designed and prepared for future expansion up to at least 800–1,000 kW (e.g. by parallel operation of an additional unit or by modular extension). All necessary interfaces (electrical, control, fuel, exhaust, foundation provisions) for the future extension must be included and documented. | |
| The stated minimum output must be available under the specified site conditions after application of all manufacturer derating factors, including ambient temperature and altitude. | |
| The generator set(s) must have a Prime Power rating suitable for unlimited annual operating hours at variable load, in accordance with ISO 8528-1 or equivalent. A standby-only generator rating must not be accepted. | |
| Three-phase AC output. | |
| Rated frequency: 50 Hz. | |
| Rated output voltage must be compatible with the proposed electrical architecture, transformers, switchgear, PCS and PV inverter system. Where connection is made to the common LV bus, the nominal voltage must be within the 400–800 V AC range of the overall plant architecture. | |
| Alternator, engine, governor, AVR and generator controller must be designed and coordinated as a complete generating set. | |
| Hybrid minigrid compatibility | |
| The generator set must be specifically suitable for operation in combination with: | |
| a PV inverter system with a total continuous rated AC power of at least 1,250 kVA; | |
| the battery energy storage system and its PCS; | |
| the central EMS/PMS; | |
| the transformers, switchgear and protection system of the hybrid power plant. | |
| The generator must support stable operation with a high proportion of power-electronic generation and must be suitable for operation both with the BESS PCS and the PV inverters connected to the common mini-grid. | |
| The generator controller must permit the EMS/PMS to perform, as applicable: | |
| automatic start and stop; | |
| automatic generator sequencing where more than one generating set is installed; | |
| automatic synchronisation; | |
| active-power set-point control; | |
| reactive-power and/or power-factor control; | |
| voltage and frequency regulation; | |
| load sharing; | |
| minimum-load management; | |
| spinning-reserve management; | |
| controlled loading and unloading before connection or shutdown; | |
| coordination with BESS charging and discharging; | |
| coordination with PV curtailment; | |
| controlled transition between PV/BESS operation and diesel-supported operation. | |
| The generator must be capable of synchronising to an AC bus established by the battery PCS. | |
| The generating system must also be capable of black-starting a de-energised AC bus, unless the bidder demonstrates that black start is performed by the BESS PCS and provides the complete automatic sequence for subsequent generator synchronisation. | |
| Partial-load and hybrid operation | |
| The generator set must be optimised for operation in a PV-diesel-battery hybrid system, where diesel generation may be subject to frequent load variations and extended periods below nominal output. | |
| Stable continuous operation at 25% of rated active power or lower must be possible without abnormal deterioration, subject to the manufacturer's prescribed operating and maintenance procedures. | |
| The bidder must state: | |
| minimum permissible continuous load; | |
| recommended continuous operating load range; | |
| maximum permissible duration below the recommended minimum load; | |
| fuel consumption at 25%, 50%, 75% and 100% of rated active power; | |
| specific fuel consumption in g/kWh at the above load points; | |
| measures implemented to prevent wet stacking, carbon deposits, oil dilution or accelerated engine deterioration during prolonged low-load operation; | |
| any automatic load-management or regeneration procedure required after prolonged operation at low load. | |
| Where a multi-generator configuration is offered, the automatic sequencing strategy must minimise inefficient low-load operation by starting or stopping individual generator sets according to actual demand, BESS state of charge and available PV generation. | |
| Dynamic performance | |
| The generator set must be capable of stable operation under rapid changes in consumer load, PV production and BESS charge/discharge power. | |
| The engine governor and automatic voltage regulator must be suitable for dynamic microgrid operation and interaction with grid-forming and/or grid-following power electronic converters. | |
| The bidder must provide guaranteed data for: | |
| permissible load-step application and rejection; | |
| transient frequency deviation and recovery time; | |
| transient voltage deviation and recovery time; | |
| governor characteristics; | |
| AVR characteristics; | |
| short-circuit contribution; | |
| alternator reactances; | |
| permissible harmonic distortion; | |
| operation with non-linear converter loads. | |
| The generator must comply with the relevant dynamic performance requirements of ISO 8528-5 or equivalent. | |
| The BESS may provide fast transient support and spinning reserve. However, generator stability must not depend on the BESS compensating for fundamentally inadequate engine, governor, alternator or AVR performance. | |
| Protection | |
| The generating system must include, as a minimum, appropriate protection against: | |
| overcurrent and short circuit; | |
| earth fault; | |
| reverse power; | |
| under- and over-voltage; | |
| under- and over-frequency; | |
| overload; | |
| overspeed; | |
| high coolant temperature; | |
| low lubricating-oil pressure; | |
| alternator overheating; | |
| battery/start-system failure; | |
| emergency shutdown. | |
| Protection settings must be coordinated with the overall microgrid protection concept and must be adjustable where required for selective operation. | |
| The generator base frame and complete generating set shall be mechanically designed to withstand the loads and stresses arising during normal operation, short-circuit conditions, overspeed, testing, lifting, handling and transport without permanent deformation or loss of alignment. | |
| Control, monitoring and communication | |
| The generator controller must communicate with the central EMS/PMS through Modbus TCP/IP, Modbus RTU or an equivalent open and fully documented industrial communication protocol. | |
| The Supplier must provide the complete communication register, addressing information, protocol documentation and any software or configuration files necessary for system integration. | |
| The following information must be available to the EMS/PMS as a minimum: | |
| generator available/not available; | |
| running/stopped; | |
| synchronised; | |
| active power; | |
| reactive power; | |
| apparent power; | |
| power factor; | |
| phase voltages; | |
| phase currents; | |
| frequency; | |
| engine speed; | |
| coolant temperature; | |
| lubricating-oil pressure; | |
| fuel level; | |
| battery voltage; | |
| operating hours; | |
| number of starts; | |
| warnings; | |
| alarms and shutdown conditions. | |
| Remote start/stop and applicable operating set points must be writable by the EMS/PMS. | |
| Fuel tank and autonomy | |
| The generating system must be supplied with an integrated or separate diesel fuel storage system providing a minimum usable fuel capacity sufficient for 10 hours of continuous operation at 100% of the total rated active electrical output, without refuelling. The generator day tank shall be equipped with an electronic fuel level monitoring system. The fuel level and relevant tank alarms shall be made available to the plant EMS system via a potential-free contact, RS485/Modbus interface or another suitable industrial communication interface. The Bidder shall clearly specify the proposed monitoring and communication interface. | |
| Tank sizing must be based on the manufacturer's guaranteed fuel consumption at full rated output and must include an appropriate operational reserve. | |
| The required autonomy must be calculated using usable fuel volume, not nominal geometric tank volume. | |
| The fuel system must include, as applicable: | |
| main storage and/or day tank; | |
| fuel supply and return lines; | |
| shut-off valves; | |
| fuel filtration; | |
| water separator; | |
| filling connection; | |
| drainage connection; | |
| fuel-level measurement; | |
| low-fuel alarm; | |
| high-level and overfill protection; | |
| all pumps and accessories required for automatic operation. | |
| Where several generator sets are proposed, a common fuel storage system may be used provided that it supplies all generators safely and maintains the specified total system autonomy. | |
| A larger bulk diesel storage system and associated civil works and fuel piping will be provided separately as part of the local installation works. The Supplier shall provide all technical interface data required for the proper design and connection of the external fuel storage system, including fuel consumption at relevant load points, required fuel supply pressure, minimum and maximum permissible inlet pressure, required flow rate, connection dimensions, return-flow requirements where applicable, filtration requirements and any other manufacturer-specific requirements for reliable generator operation. | |
| Environmental and groundwater protection | |
| The fuel storage and supply system must be designed to prevent contamination of soil and groundwater by diesel fuel, lubricating oil, coolant or other hazardous liquids. | |
| The main fuel tank must be either: | |
| double-walled with leak monitoring, or | |
| installed within a liquid-tight secondary containment system. | |
| Secondary containment must have a retention capacity of at least 110% of the volume of the largest individual tank. | |
| Fuel filling, drainage and maintenance points must be arranged so that accidental spills can be captured and removed without discharge to the soil. | |
| The installation must include appropriate: | |
| leak protection; | |
| overfill protection; | |
| protected filling points; | |
| drip and spill containment; | |
| safe drainage arrangements. | |
| The engine and auxiliary systems must be mounted so that foreseeable leakage of engine oil, coolant or fuel cannot discharge directly onto the ground. | |
| Outdoor enclosure and climatic protection | |
| The complete generator set must be suitable for permanent outdoor installation under the climatic conditions specified for the project site. The generator enclosure and exhaust silencing system shall be designed so that the sound pressure level does not exceed 75 dB(A) at a distance of 7 m from the generator set under rated operating conditions. The Bidder shall provide the corresponding manufacturer’s noise-emission data. | |
| It must be supplied with a robust, corrosion-resistant, UV-resistant and weatherproof acoustic enclosure or canopy providing protection against: | |
| rain; | |
| direct solar radiation; | |
| wind-driven dust; | |
| insects and small animals; | |
| accidental contact with hot or moving parts. | |
| Ventilation and cooling must permit continuous operation at full rated output at the specified maximum ambient temperature without exceeding manufacturer operating limits. The proposed cooling and ventilation concept shall also be described and shall demonstrate that the required output can be maintained under the specified site conditions. | |
| Air intake and exhaust arrangements must prevent rainwater ingress. | |
| The enclosure must provide safe access for inspection, servicing and replacement of filters and normal consumable parts. | |
| Concrete foundation and vibration isolation | |
| The generator set must be designed for installation on a reinforced concrete foundation. | |
| The Supplier must provide all information required for design of the foundation by the installation contractor, including: | |
| generator dimensions; | |
| operating and transport weights; | |
| centre of gravity; | |
| static and dynamic loads; | |
| required foundation dimensions; | |
| anchor-bolt positions; | |
| minimum concrete requirements where applicable; | |
| vibration-isolation requirements; | |
| cable and pipe entry locations; | |
| required clearances for ventilation and maintenance. | |
| Suitable anti-vibration mounts must be included in the supply. | |
| The Supplier's provision of foundation data must not transfer responsibility for civil design or construction of the foundation to the Supplier. | |
| Exhaust system | |
| The complete exhaust system required for safe outdoor operation must be included. | |
| It must comprise, as applicable: | |
| exhaust silencer; | |
| flexible connection; | |
| insulated or protected hot surfaces; | |
| rain cap or equivalent weather protection; | |
| supports and fittings; | |
| all components required between the engine outlet and final exhaust discharge. | |
| Exhaust back pressure must remain within the engine manufacturer's permissible limits. | |
| The exhaust outlet must be located and oriented to minimise recirculation of exhaust gases into cooling-air or combustion-air intakes. | |
| Starting system | |
| Each generator must be equipped with a complete electrical starting system including starter motor, batteries, battery charger and necessary protection. | |
| The starting batteries must permit at least three consecutive start attempts without external charging. | |
| The battery charger must operate from the station auxiliary supply and must maintain the batteries automatically in readiness for EMS/PMS-controlled start commands. | |
| Maintenance and serviceability | |
| The generator must be suitable for long-term operation in a remote or semi-remote power system. | |
| Routine maintenance points, filters, fluid-level indicators, drain points and consumable components must be readily accessible. | |
| The Supplier must provide: | |
| preventive-maintenance schedule; | |
| recommended service intervals; | |
| list of consumables; | |
| list of recommended spare parts for at least five years of operation; | |
| special tools required for maintenance; | |
| diagnostic software and interfaces where required; | |
| workshop manuals; | |
| electrical drawings; | |
| engine and alternator manuals; | |
| controller documentation. | |
| No proprietary software lock, password restriction or unavailable service tool must prevent normal diagnostics and maintenance by appropriately trained operating personnel. | |
| Warranty | |
| The complete generator system, including engine, alternator, controller, starting system, cooling system, fuel system and all supplied auxiliaries, must be covered by a minimum warranty of: | |
| five (5) years or 5,000 operating hours, whichever occurs later. | |
| The warranty period must commence upon successful commissioning and acceptance of the generator as part of the complete hybrid power system. | |
| The warranty must explicitly cover operation under the conditions specified in this procurement, including: | |
| Prime Power operation; | |
| variable loading; | |
| frequent automatic starting and stopping; | |
| prolonged partial-load operation within the manufacturer's specified operating envelope; | |
| automatic operation under EMS/PMS control; | |
| parallel operation with the BESS PCS; | |
| parallel operation with the PV inverter system. | |
| Any exclusions, maintenance conditions or mandatory service interventions required to preserve the warranty must be clearly identified in the offer. | |
| The bidder must confirm the availability of authorised technical support and spare parts throughout the warranty period. | |
| Documentation and system integration | |
| The Supplier must provide all manufacturer documentation required for integration of the generator into the hybrid PV-BESS-diesel system, including: | |
| single-line diagrams; | |
| wiring diagrams; | |
| controller I/O lists; | |
| communication registers; | |
| generator protection settings; | |
| synchronisation requirements; | |
| start/stop sequences; | |
| permissible loading and unloading rates; | |
| minimum-load limitations; | |
| black-start procedure; | |
| interface requirements with the EMS/PMS; | |
| foundation and installation drawings; | |
| fuel-system drawings; | |
| commissioning procedures; | |
| test protocols; | |
| maintenance documentation. | |
| The Supplier must cooperate with the PCS, inverter and EMS/PMS suppliers as reasonably required to ensure correct integration and coordinated operation of the complete hybrid power plant. |
Sites
| Site | Capacity | Unnamed: 2 | Unnamed: 3 | Available Space | Unnamed: 5 | Unnamed: 6 | Unnamed: 7 | Unnamed: 8 | Remaining Shadows | Module | Unnamed: 11 | Grid Connection | Remarks The comparative specification should indicate any deviation from the technical parameters or functional description of the tender documents. If there is no deviation from the technical specification in columns A-M, please indicate "Yes". Otherwise, describe your special features in this column. |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PV | Inverter | Battery | Installation type | Surface available | Agricultural use | Surface Material | Surface Condition | Surface Orientation | Tilt Angle | ||||
| Pala | 2 MWp | min. 1,5 MW | min. 6 MWh | ground | Yes | Horticulture | Soil | Solid | Clouds | South | 10-15 | Isolated grid, 20 kV medium voltage |