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Dutch startup Ore Energy has closed a $43 million Series A led by Plural and HV Capital to manufacture iron-air batteries capable of storing renewable power for up to 100 hours, targeting AI data centers as Europe's grid buckles under surging electricity demand.
Key Takeaways
- Ore Energy raised $43M Series A led by Plural and HV Capital, with Positron Ventures participating; total funding now $61M.
- Its iron-air batteries store renewable electricity for 24-100 hours at roughly one-tenth the per-unit cost of lithium-ion.
- A 1 GWh agreement with Dutch supplier Budget Thuis - with a committed first phase of 400 MWh due in 2028 - anchors commercial traction.
Lead
Amsterdam-based Ore Energy announced a $43 million Series A on August 4, 2026, co-led by Plural and HV Capital, with existing investor Positron Ventures returning. The round brings total funding to $61 million, implying a prior raise of roughly $18 million. The company is developing modular iron-air battery systems for long-duration grid storage, aiming to begin gigawatt-hour-scale manufacturing by 2028.
How Does Iron-Air Storage Actually Work?
The core mechanism is controlled rusting. Iron electrodes oxidize on discharge - releasing electrons as iron converts to iron oxide - and the process reverses on charge when electricity is applied. The inputs are iron, water, and air: no lithium, no cobalt, no supply chain drama. That chemical simplicity is the cost argument. Ore Energy puts its cost per unit of capacity at roughly one-tenth that of lithium-ion storage, though independent verification of that figure is not yet public.
The discharge window of 24 to 100 hours is the key differentiator. Lithium-ion systems are typically designed for two to four hours of storage, adequate for daily demand smoothing but not for periods of low wind or solar output spanning days. Multi-day storage, if it can be built cheaply enough, changes the economics of running a grid on intermittent renewables.
Why Are AI Data Centers Driving This?
European grid operators are staring at an uncomfortable arithmetic problem. Data center electricity demand across Europe is projected to rise by 45 terawatt-hours by 2030, driven in large part by AI infrastructure buildout. AI data centers alone are expected to more than quadruple their consumption in the same period globally. That demand is nearly constant - these facilities run around the clock, seven days a week - which sits awkwardly alongside a power grid increasingly reliant on wind and solar, both of which vary by hour and season.
The other side of the equation is waste. Europe's grid already curtails an estimated 72 terawatt-hours of renewable electricity annually because generation exceeds what transmission infrastructure can absorb in real time. Long-duration storage is the mechanism that can hold excess renewable output and release it when generation dips. Ore Energy's pitch to data center operators and grid utilities is essentially: we can supply firm, renewable-backed power without the cost floor imposed by lithium-ion capacity limits.
Commercial Progress
The company's most concrete commercial signal is a deal signed in June 2026 with Budget Energie, which operates the Budget Thuis brand in the Netherlands. The agreement covers up to 1 gigawatt-hour of iron-air storage, with a committed first phase of 400 megawatt-hours scheduled for delivery in 2028. Ore Energy has also disclosed a collaboration with French utility EDF, though the financial terms and scale of that arrangement have not been made public.
The 2028 delivery timeline for the Budget Thuis commitment aligns with the company's stated goal of reaching gigawatt-hour-scale manufacturing capacity by that year. Ore Energy currently employs 50 people, and the Series A proceeds are earmarked for establishing the company's first manufacturing facility.
What Does the Round Signal for Competitors?
Plural is a European growth-stage firm with previous bets in climate and infrastructure technology. HV Capital is a German venture firm known for consumer internet but has extended into deep tech in recent years. Their co-leadership of this round is a signal that long-duration storage is moving from academic interest to commercial competition. Form Energy, the US-based iron-air competitor backed by Breakthrough Energy Ventures, is further along in production scale, which means Ore Energy faces a credible benchmark in the same chemistry class.
The $18 million implied prior raise - modest relative to the Series A - suggests Ore Energy compressed its early-stage burn and reached its commercial milestones on limited capital.
Outlook
The $61 million total raised positions Ore Energy to begin manufacturing at a meaningful scale, but gigawatt-hour production by 2028 is an ambitious target for a 50-person company. The Budget Thuis commitment provides revenue visibility. The EDF relationship, if it deepens, could open France's substantial utility procurement pipeline. Near-term, the test is whether Ore Energy can execute manufacturing buildout on the timeline it has now publicly committed to, with investor capital that needs to stretch to first commercial deliveries.
