Ore Energy's 1 GWh Dutch storage deal lands as Europe's negative-price season deepens
A Netherlands iron-air storage agreement points at the flexibility Europe still lacks as sub-zero prices spread across renewable-heavy grids.
Ore Energy, a Netherlands-based iron-air storage company, said on 22 June (2026-06-22) it had signed an agreement with Budget Thuis, one of the largest Dutch energy suppliers, to deploy 1 GWh of long-duration storage. The company called it the largest iron-air energy storage deal of its kind.8
The timing is the point. Negative power prices have become a recurring feature of Europe's renewable-heavy grids, and analysts told Montel in the week of 18 May (2026-05-18) that batteries could curb the trend but that "dozens of GW" of units would be needed to make a dent. A single gigawatt-hour project, however large for its technology, sits well short of that.1,8
That gap matters for anyone pricing European power forward. When renewable output overwhelms demand, prices fall below zero and generators pay to keep running or curtail. Germany printed EUR -499.99/MWh on 1 May (2026-05-01), and Montel reported the country was likely to see more of the same during periods of solar surplus and low demand, with the swings posing challenges for grid operators.2
Andre Bosschaart, head of analytics at Montel EnAppSys, described the stretch as a season of sub-zero prices two months in, as renewables deployment continued to outpace demand growth across the continent. The pattern is not uniform.7
Italy is unlikely to see widespread negative prices before 2030, analysts told Montel in the week of 4 May (2026-05-04), because market and system factors keep prices above zero even after regulatory changes allowed them. The divergence underlines how much the negative-price story depends on local grid structure and the renewable share, not a single European trend.6
Yet the same system that dumps power below zero on sunny, windy days has been producing multi-year highs at the other extreme. CNBC reported on 18 May (2026-05-18) that a benchmark contract had risen more than 250% since January, with French and German power contracts both doubling, and British day-ahead electricity up nearly 19% to GBP 475 on Wednesday (2026-05-13), according to Reuters. Low wind, strong commodities and firm carbon did the work.4
That volatility is the trading case for storage, and it is why the money going into grids dwarfs any single battery deal. TenneT, the sole Dutch transmission operator and the biggest in Germany, plans to spend around EUR 200bn by 2034, according to the Economist. ENTSO-E puts the total needed to meet EU electrification goals by 2050 at roughly EUR 800bn.5
Germany alone has spent about USD 200bn over two decades promoting cleaner electricity, the New York Times reported, and the negative prices are in part the bill for that build-out arriving faster than the wires and flexibility to absorb it.3,5
The queue tells the same story. Some 500 GW of battery projects have applied for grid connections in Germany, more than 20 times current capacity, though the Economist cautioned that a first-come, first-served hook-up rule encourages speculative filings that will not all be built. Applications are not megawatts on the ground.5
For now the price signal points down at the front. German power traded near EUR 101/MWh in weekend quotes as of 11 July (2026-07-11), with TTF gas around EUR 48.80/MWh, levels that leave thermal plant squeezed on the days renewables run hard. Storage economics improve as the spread between those sub-zero hours and the winter peaks widens, and that spread has been widening.4
The unresolved question is one of pace. Iron-air and other long-duration systems shift surplus across days rather than hours, which is closer to what a solar-heavy grid needs than the four-hour lithium fleet. But Ore Energy's 1 GWh is a first, not a fleet. Until storage additions start closing the "dozens of GW" gap analysts flagged, negative prices remain the market's clearing mechanism for surplus renewables, and the next batch of German connection approvals will show whether the queue is turning into steel.1,82