Whalesbook
The addition of a new 33.333 MW/160.480 MWh Battery Energy Storage System (BESS) in Rajasthan by ACME Solar Holdings' subsidiary, ACME Sun Power Private Limited, significantly enhances the company's energy storage capabilities. Although the project's Commercial Operation Date (COD) is scheduled for May 6, 2026, its commissioning marks a key step, raising ACME Solar's total operational BESS capacity to 200 MW / 962.940 MWh. This capacity boost is vital for supporting grid stability and optimizing energy use, especially with increasing integration of renewable energy sources.
Company Strategy and Outlook
ACME Solar Holdings is an integrated renewable energy firm active in solar, wind, and storage. The company has been progressively commissioning phases of its BESS projects in Rajasthan and aims to operationalize 10 GWh of BESS capacity by 2027. This strategic expansion is further solidifying its presence in key renewable energy hubs.
Tax Dispute Looms
However, the company is also managing a potential financial challenge. ACME Solar Holdings received a Show-Cause cum Demand Notice alleging a Goods and Services Tax (GST) demand of Rs 149.73 crore, plus interest and penalties. This notice pertains to alleged short payment of GST on solar power generating systems between fiscal years 2021 and 2025. The Rajasthan High Court has issued an interim stay on this notice, offering temporary relief, but the final outcome could still lead to significant financial liabilities.
Market Landscape
In the competitive BESS market, ACME Solar's rivals include Tata Power, a pioneer in BESS since 2019, and JSW Energy, which has secured substantial standalone BESS project orders. India's total BESS capacity reached over 204.5 MW (505.6 MWh) as of September 2025, pointing to rapid sector growth.
Key Investor Watchpoints
Investors will be closely monitoring the progress towards the May 6, 2026 COD for the new Rajasthan project and any further capacity additions. Developments regarding the GST notice and its eventual resolution will also be critical factors.