ACME Solar Holdings Limited has commissioned a further 17.91 MW / 74.323 MWh of battery energy storage system (BESS) capacity at its Firm and Dispatchable Renewable Energy (FDRE) project in Chittorgarh district, Rajasthan. The company told the stock exchanges on 23 October 2026 that the capacity was commissioned on that day through its wholly owned subsidiary, ACME Sigma Urja Private Limited, and that the commercial operation date (COD) for it is 25 October 2026.
The new capacity is part of a BESS component of 250 MW / 1,069 MWh (discharge capacity) planned for the project. With this addition, ACME Sigma Urja has commissioned a cumulative 71.640 MW / 297.292 MWh of discharge capacity, which is roughly 29 per cent of the planned power rating and about 28 per cent of the planned energy capacity.
What the filing says
The disclosure was made under Regulation 30 of the SEBI Listing Obligations and Disclosure Requirements Regulations, 2015, and was addressed to BSE Limited (scrip code 544283) and the National Stock Exchange of India (symbol ACMESOLAR). It was issued as a continuation of the company’s earlier intimation dated 30 September 2026.
The project is located at Village Neemri, Tehsil Rawatbhata, District Chittorgarh, Rajasthan. The filing describes the commissioned equipment as the BESS component of the FDRE project and gives the discharge capacity in two figures, 17.91 MW and 74.323 MWh.
The filing does not name the buyer of the power, the tariff, the project cost, or the planned dates for the remaining storage capacity. It also does not give the size or the commissioning status of the solar and wind generation that would sit alongside the batteries. Those details were not disclosed and are therefore not covered here.
How the project has been commissioned so far
The Chittorgarh storage is being brought into service in stages. The first phase of 53.73 MW / 222.969 MWh was commissioned on 30 September 2026, with a COD of 2 October 2026. Adding the 17.91 MW now commissioned gives 71.640 MW, and adding 74.323 MWh to 222.969 MWh gives 297.292 MWh, which matches the cumulative figures in the latest filing.
At the time of the first phase, the company indicated that the renewable energy generation component of the project was still under development. The latest filing speaks only about the BESS component. Based on the figures disclosed, about 178 MW and roughly 772 MWh of the planned storage remain to be commissioned.
Why storage is built first
Commissioning the batteries ahead of the generation can look unusual, but it is a practical way to manage a large hybrid build. Battery systems are modular, so containers can be installed, tested and energised in blocks while solar and wind construction continues. Each block that is commissioned gets a COD of its own, which lets the developer start operations on part of the asset instead of waiting for the full 250 MW / 1,069 MWh to be ready.
ACME Solar is building storage-backed projects at several sites. Its subsidiary ACME Greentech Seventh Private Limited, for example, has been commissioning BESS capacity for a 300 MW / 1,200 MWh FDRE project at Bikaner, Rajasthan, and a stock-exchange summary of the company’s 1 October 2026 disclosure lists a further 107.36 MW / 437.49 MWh of storage commissioned that day. Phases of the Chittorgarh and Bikaner projects have therefore been reaching COD within weeks of each other.
What FDRE means
FDRE stands for Firm and Dispatchable Renewable Energy. In an FDRE project, solar and wind generation is combined with a battery system so that the plant can supply power at a committed, steady level over the day instead of only when the sun shines or the wind blows. Central agencies such as SECI, NHPC, NTPC and SJVN have run FDRE tenders as a way to add renewable supply that is closer in character to conventional power, and to cover the evening peak that solar alone cannot serve.
What it means for India’s clean-energy sector
India’s electricity demand peaks in the evening, after solar output has fallen, and grid operators have been looking to batteries to cover that gap. Storage that is already commissioned is useful in a way that storage on paper is not: it adds real capacity that a buyer can schedule, and it gives developers operating data on how large lithium-ion systems perform over time.
For ACME Solar, the latest filing shows steady delivery on a project that is being commissioned in blocks. A cumulative 71.640 MW / 297.292 MWh at Chittorgarh is a meaningful share of the planned size, but most of the build is still ahead. The next filings will show how quickly the remaining capacity is added and whether the generation side of the project follows.
What to watch next
Further commissioning of the remaining BESS capacity at Neemri, the status of the solar and wind component, and the power sale arrangement are the points to watch in the company’s coming disclosures. None of them is covered by this filing.
Official references
1. ACME Solar Holdings Limited, Regulation 30 intimation to BSE Limited and National Stock Exchange of India Ltd, “Update on commissioning of Battery Energy Storage System (BESS) Project”, dated 23 October 2026: https://www.bseindia.com/xml-data/corpfiling/AttachLive/1e6e9e79-b281-4635-8144-42e789d2f7fb.pdf
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