⚡ Quick Read
- What happened: ACME Solar Holdings has commissioned 155 MW/470.25 MWh of battery energy storage systems (BESS) in Rajasthan, bringing its total operational storage capacity to 951.74 MWh.
- Why it matters: These merchant-operated projects demonstrate a viable business model for BESS by leveraging peak and off-peak price differentials to enhance grid stability.
- Watch: ACME’s aggressive scaling, with 3,114.64 MWh of storage planned in Rajasthan and a target of 2 GWh of total capacity by Q4 FY 2026.
Background and Context
Gurgaon-based independent power producer ACME Solar Holdings has significantly expanded its footprint in the energy storage sector. The company has officially commissioned 155 MW/470.25 MWh of battery storage projects in Rajasthan. This milestone is a critical component of ACME’s broader strategy to transition from a pure-play solar developer to a diversified renewable energy player capable of providing firm and dispatchable renewable energy (FDRE).
Key Details
Following this commissioning, ACME’s total operational battery storage capacity now stands at 297.67 MW/951.74 MWh. The newly commissioned projects are connected to the existing interstate transmission system (ISTS) and are specifically designed for merchant operations. By charging during off-peak hours and discharging during peak-demand periods, the company aims to capitalize on price differentials, providing a new revenue stream while simultaneously supporting grid stability.
ACME’s pipeline remains robust, with 835 MW/3,114.64 MWh of battery storage projects planned within Rajasthan alone. On a national scale, the company manages a diversified portfolio of 8,071 MW. Its construction pipeline includes 5,093 MW of projects, featuring approximately 16 GWh of battery energy storage installations. Notably, in February 2026, ACME secured 301 MW at a tariff of ₹6.28/kWh under the Solar Energy Corporation of India’s (SECI) auction for assured peak supply.
What This Means for EPCs and Developers
For the Indian EPC and developer ecosystem, ACME’s move validates the merchant storage business model. Developers are increasingly looking beyond simple generation to storage-integrated solutions to mitigate curtailment risks and improve project bankability. The successful debt tie-up of ₹47.2 billion secured by ACME last year—including ₹27.1 billion from the Power Finance Corporation—highlights that Indian financial institutions are becoming more comfortable financing large-scale storage projects, provided they are backed by strong FDRE or hybrid configurations.
What Happens Next
ACME has revised its internal targets, now aiming to commission approximately 2 GWh of storage capacity by Q4 FY 2026, doubling its previous expectation of 1 GWh. As the company continues to execute its 16 GWh construction pipeline, the industry will closely monitor the operational performance of these merchant-based storage assets. The ability to maintain grid stability while ensuring profitability through price arbitrage will likely set the benchmark for future large-scale storage tenders in India.
