ESS, based in Oregon, has agreed to sell 2 GWh of long-duration batteries to SB Energy, a wholly owned subsidiary of SoftBank Group Corporation. The transaction is valued at least $300 million and the entire agreement will last till 2026. ESS has already delivered the first system at SB Energy’s facility in California. SB Energy plans to set up more such battery systems in Texas and California.

The batteries manufactured by ESS have iron flow systems that utilise iron, salt and water for the electrolyte. This combination eliminates the dangers of fire and explosions. ESS has also recently signed a deal to deliver 17 long-duration iron flow battery systems for a solar project in Spain. These systems will have a combined capacity of 8 MWh.

Recently, Canadian Solar’s majority-owned subsidiary, CSI Solar Co., got a contract to supply a 350 MW/1,400 MWh fully integrated battery storage system to the Crimson stand-alone battery storage project in Riverside County, California. CSI will also provide EPC and long-term maintenance services as part of the contract. A few months back, battery manufacturer Eos Energy Storage signed agreements to deploy 1 GWh of novel aqueous zinc battery energy storage in Texas and 500 MWh in California, marking a massive scale-up in expected installations for the systems.

REGlobal’s Views: The global battery energy storage market has expanded over the recent months owing to a rapid fall in battery prices, increase in project scale and policy drivers. With increasing installation of renewable energy projects, battery storage technology has assumed a central role as a key balancing technology in the power sector.