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SECI Floats BoS Tender for 70 MW Solar Project with 25 MW/50 MWh BESS in Andhra Pradesh

The Solar Energy Corporation of India has invited bids for the balance of system package of a 70 MW ISTS-connected solar PV project with a 25 MW/50 MWh battery energy storage system at Ramagiri in Andhra Pradesh. Bid submission ends on July 24, 2026.

July 01, 2026. By Mrinmoy Dey

The Solar Energy Corporation of India has floated a Balance of System tender for a 70 MW ISTS-connected solar PV project paired with 25 MW/50 MWh Battery Energy Storage Systems (BESS) at Ramagiri in the Sri Sathya Sai district of Andhra Pradesh.

The scope of work includes design, engineering, supply (excluding solar PV modules), construction, erection, testing, commissioning and maintenance of the solar plus BESS plant. The bidder must also provide comprehensive operation and maintenance (O&M) for 5 years.

Bidders must pay INR 25,000 (plus GST) as a tender processing fee. Further, they need to furnish INR 3,81,24,000 as an earnest money deposit (EMD).

The last date for submission of bids is July 24, 2026 till 2:00 PM. The techno-commercial bids will be opened on the same day at 4:00 PM.

Bidders can qualify through any one of three routes. Under Route I, they must have executed EPC contracts for ground-mounted grid-connected solar PV projects with a cumulative capacity of at least 35 MW over the last seven years, including at least two projects of 7 MW or more each. These projects must have been operational for at least six months before the bid submission date.

Under Route II, bidders can qualify as solar project developers by demonstrating the same experience criteria – a cumulative 35 MW capacity and at least two projects of 7 MW or above, each operational for a minimum of six months.

Under Route III, bidders must have executed a single industrial project worth at least INR 95.31 crore in sectors such as power, steel, oil and gas, petrochemicals, fertilisers, cement, coal mining, infrastructure or other process industries, along with at least one 33 kV or higher electrical substation project. The industrial project and substation project may be separate, but both must have been in successful operation for at least six months prior to bid submission.

As for financial eligibility, the bidder must have a minimum average annual turnover (MAAT) of INR 57.18 crore in the last three financial years. Additionally, the bidder must have a minimum working capital of INR 40.85 crore or produce a bank-confirmed line of credit of at least INR 40.85 crore to meet the working capital requirement of the project.

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Solar PV

Solar Energy Corporation of India

SECI Invites Bids

SECI BoS tender

Solar plus BESS tender

Solar plus BESS projects in Andhra Pradesh