Iron flow battery company ESS Tech Inc highlighted its recent partnership with Google and the acquisition of VoltStorage GmbH, as profitability remained out of reach in 2025.
In this US news roundup, CC Power signs an agreement with Hydrostor for 400MWh of its Willow Rock LDES project, PowerSecure builds microgrids in New Mexico, and ESS Inc acquires VoltStorage.
Lithium-ion companies have come out as the top-rated suppliers on a new long-duration energy storage (LDES) leaderboard, while CO2 Battery company Energy Dome is the highest non-lithium company.
Energy storage developers are securing significant capital and strategic partnerships, with ESS Inc launching a 50MWh iron flow battery pilot, Energy Vault closing a US$300 million investment, and NineDot obtaining US$175 million in debt financing.
As the US looks to establish reliable battery supply chains, TerraFlow Energy and ESS Tech look beyond lithium-ion for long-duration energy storage solutions.
The CEO of ‘All-iron’ flow battery manufacturer ESS Tech Inc (ESS Inc) has resigned, one of a number of steps the company has taken to ‘position it for the future’ after slower-than-expected growth.
A double-header of big news from Germany, with construction starting on a ‘Grid Booster’ BESS from TransnetBW and Fluence and the EU putting €58 million towards a project that will combine green hydrogen and iron flow battery storage at scale.
