Elestor’s proprietary hydrogen bromine (HBr) flow battery operates a closed system with separate tanks of hydrogen gas and aqueous HBr/Br2 solution interacting through a membrane. The scalable design offers up to 10,000 charge/discharge cycles, uses bromine from seawater for abundant material supply, and integrates with hydrogen production via electrolysis for enhanced efficiency in large-scale, long-duration energy storage.
Elestor’s HBr flow battery systems feature a two-tank configuration with hydrogen and HBr/Br2 solution, delivering up to 10,000 cycles, customizable energy capacities (e.g., 200 kWh to 3,000 kWh), power outputs such as 400 kW with 1 MWh storage, and compatibility with electrolyzers for continuous operation.
In 2024, Elestor activated its first commercial HBr flow battery installation and formed partnerships with Vopak to scale storage capacity from 200 kWh to 3,000 kWh, and with ITMGroup to develop a 400 kW power system with 1 MWh storage.
Elestor B.V. has raised €30M to date from Equinor Ventures, Invest-NL, Royal Vopak (via Vopak Ventures) and Somerset Capital Partners; it is also supported by EIT InnoEnergy and Enfuro Ventures. As of 2022, the company was valued at $132–198M.
