Amsterdam Startup Bets $43M That Rust Can Outlast Lithium on Europe's Grid

What Happened

Ore Energy, a roughly 50-person startup based in Amsterdam, has raised $43 million in Series A funding to expand production of iron-air batteries. The round was led by investors Plural and HV, with existing backer Positron Ventures also participating, pushing the company's total funding to $61 million.

The batteries at the center of the round work differently from the lithium-ion cells that dominate today's grid storage market. Ore's design uses electrodes, water, and air rather than lithium and cobalt. Charging the battery runs electricity backward through the system to convert rust back into iron; discharging lets that iron rust again, releasing the stored energy in the process — the mechanism behind the "breathing battery" nickname. Because iron is abundant and doesn't need to be imported the way lithium and cobalt do, Ore says the batteries can be built entirely within Europe.

The headline figure is duration: Ore's batteries can store power for up to 100 hours, compared with the 4-to-12-hour range typical of most grid batteries in use today. At roughly one-tenth the cost of lithium-ion per the company, that combination of long duration and lower cost is the core of Ore's pitch.

Why It Matters

The Numbers

Funding Landscape

What the source does provide is competitive context. Ore's $43 million round is modest next to US-based Form Energy, which has raised more than $1.2 billion at a $3.4 billion valuation and is building a West Virginia factory targeting 500 MW of iron-air production per year by 2028. In Europe, companies including iwell and Terralayr are also working on grid-scale storage, though the source notes they're focused on shorter-duration systems rather than Ore's 100-hour iron-air approach. The source frames Ore's smaller raise as sufficient to buy the company time to scale, rather than a signal of weaker investor confidence.

What's Next / Things to Watch

Ore Energy has laid out two milestones: reaching gigawatt-hour-scale production by 2028, and making iron-air storage a core part of European grid infrastructure by 2035. Near-term, its 1 GWh agreement with Budget Thuis and ongoing pilots with EDF are the concrete commercial signals to watch for progress updates. The broader question the source raises is whether utilities shift away from paying to curtail wind farms or firing up gas turbines during shortfalls, toward buying cheap surplus renewable power and storing it for days at a time — the shift Ore is betting its business on.

FAQs

Endnotes: ⚠️ The supplied source material did not include any external URLs or citation links to attribute here. Two related items were referenced by headline only ("June AI Raises $20M To Automate Enterprise AI Deployment" and "Base Power Raises $1B To Mass Produce Batteries for Homes") but no links were provided for either, so they are not included as sourced endnotes.