Certain Energy Raises £10 Million Series A For Long-Duration Energy Storage
By Amit Chowdhry ● Sep 2, 2026
Certain Energy, formerly known as RFC Power, has raised £10 million in Series A funding to commercialize its manganese flow battery technology and scale long-duration energy storage systems designed to stabilize electricity grids and support renewable power generation. The round was led by the British Business Bank, which invested £3.5 million, with participation from Centrica, Temasek Trust's Catalytic Capital for Climate and Health, and Ceres Power.