Dutch startup Ore Energy has secured $43 million in Series A funding to commercialize iron-air battery technology capable of delivering multi-day energy storage, a critical missing piece for fully decarbonized grids. The round, backed by investors including Positron Ventures and the European Innovation Council Fund, moves the company from pilot-scale validation toward its first commercial deployments in Europe. Iron-air chemistry — which reversibly rusts and de-rusts iron using air and water — offers a pathway to 100-hour-plus duration at a fraction of lithium-ion’s cost per kilowatt-hour, directly addressing the dunkelflaute problem of extended wind and solar lulls that no four-hour battery can bridge.
The funding positions Ore Energy as Europe’s most credible answer to Form Energy, the Massachusetts-based pioneer that has raised over $1 billion to pursue the same chemistry for the U.S. market. Where Form Energy targets utility-scale projects of 100 megawatts and up, Ore Energy is designing modular 1–10 megawatt systems aimed at industrial users, distribution-grid operators, and renewable developers who need firm capacity without waiting for transmission upgrades. That modularity could accelerate revenue: smaller projects face shorter permitting timelines and can be aggregated into virtual power plants, a model gaining traction across Germany and the Netherlands.
Europe’s policy environment adds urgency. The EU’s Net-Zero Industry Act sets a 2030 target of 200 gigawatt-hours of annual battery manufacturing capacity, but lithium-ion supply chains remain heavily concentrated in China. Iron-air sidesteps critical-mineral dependencies — iron is abundant, recyclable, and already produced at gigaton scale in European steel mills. The European Innovation Council’s participation signals strategic alignment: Brussels wants storage technologies that can be built domestically, at scale, without geopolitical leverage points.
The $43 million will fund a megawatt-scale demonstration plant and the engineering work to drive balance-of-plant costs down — the real determinant of whether iron-air hits its promised $20 per kilowatt-hour at the system level. Investors are betting that Ore Energy’s team, spun out of TU Delft’s electrochemical storage lab, can translate academic rigor into manufacturing discipline. If they succeed, the next funding round won’t be about proving the chemistry; it will be about booking gigawatt-hours of offtake.
Read the full report at Energy Storage News.