en.Wedoany.com Reported - Mahatma Phule Renewable Energy and Infrastructure Technology Limited (MAHAPREIT) has issued a tender to develop a total of 100 MW of rooftop solar projects in Maharashtra. These behind-the-meter (BTM) facilities will be developed under the RESCO model, with an option to include battery energy storage systems (BESS). The tender document costs INR 10,000 plus 18% GST, and the bid submission deadline is June 23, 2026.

The successful bidder will be responsible for the design and engineering of the solar photovoltaic system (including BESS) and must comply with the guidelines of the Ministry of New and Renewable Energy (MNRE), the Central Electricity Authority (CEA), the Maharashtra Electricity Regulatory Commission (MERC), the Maharashtra State Electricity Distribution Company Limited (MAHAVITARAN/DISCOM), and the Maharashtra Renewable Energy Policy 2025-36.

Bidders are required to undertake the design, engineering, financing, supply, installation, testing, and commissioning of the total 100 MW rooftop solar photovoltaic projects. The scope of work also includes comprehensive operation and maintenance (O&M) services for a period of 25 years. The projects will be developed under the behind-the-meter model in Maharashtra, with or without battery energy storage systems.

The tender is categorized into four segments based on capacity and storage configuration: Category A1-S covers 20–100 kW solar-only projects with an aggregate capacity of 25 MW; Category A1-B covers 20–100 kW solar projects with 30% BESS and two-hour storage, totaling 25 MW; Category A2-S covers 101–250 kW solar-only projects with an aggregate capacity of 25 MW; and Category A2-B covers 101–250 kW solar projects with 50% BESS and two-hour storage, totaling 25 MW.

The scope of work also involves the procurement and supply of all system components, including ALMM-compliant solar modules, inverters or hybrid inverters, BESS (where applicable), balance of system (BOS) components, metering equipment, and SCADA/monitoring systems. Before commencing installation, the RESCO developer must assist the procurer in submitting an online pre-notification through the renewable energy portal of MAHAVITARAN or the respective distribution company, which constitutes a mandatory advance notice.

The RESCO developer must also obtain and upload the CEA safety compliance certificate, the electrical inspector's charging permit, or the certificate of a licensed electrical contractor for systems below 200 kW (as applicable) during the online application process. The BESS must be fully integrated with the solar photovoltaic system to provide behind-the-meter energy supply and be designed to discharge at rated power for at least two hours.

The BESS capacity requirement is 30% of the installed solar capacity (in kW) for two hours (in kWh) under Category A1-B, and 50% of the installed solar capacity (in kW) for two hours (in kWh) under Category A2-B. The RESCO developer must guarantee that the BESS capacity retention rate is not less than 80% at the end of the 10th year and not less than 70% at the end of the 15th year from the commercial operation date (CoD). Any battery cell or module replacement required to meet these performance guarantees shall be the responsibility of the developer and must be covered in the quoted fixed tariff. The scope of work also includes comprehensive O&M of the BESS for 25 years, covering preventive maintenance, firmware updates, and replacement of battery cells or modules as needed. The project must achieve a minimum capacity utilization factor (CUF) of 19% annually.

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