Ore Energy Pilots 100-Hour Iron-Air BESS at EDF Lab in France

Why It Matters

The pilot provides the first real‑world evidence that iron‑air batteries can reliably balance renewable generation over days, a critical gap for European grids seeking cost‑effective decarbonisation.

Key Takeaways

• First European 100‑hour iron‑air pilot completed
• Demonstrated multi‑day storage under real utility conditions
• Uses abundant iron, water, air; no rare‑earths
• Targets long‑duration storage, cheaper than lithium‑ion beyond 12 h
• Ore plans European manufacturing facility by 2027

Pulse Analysis

The 100‑hour iron‑air battery pilot completed by Ore Energy at EDF’s Lab les Renardières marks the first multi‑day long‑duration energy storage (LDES) demonstration in Europe. Over several months the modular container system was grid‑connected, cycled through varied load profiles and seasonal conditions, and proved operable in a live utility environment. The test moves beyond the earlier Dutch installation, shifting focus from basic grid‑connection to real‑world behavior, control strategies, and integration with standard grid‑management tools. Data gathered will feed the EU’s StoRIES program, which seeks scalable solutions for balancing wind and solar output over days rather than hours.

Iron‑air technology stores energy by reducing iron oxide to metallic iron during charging and re‑oxidising it on discharge, using only iron, water and air. This chemistry eliminates rare‑earths and critical minerals, enabling a fully European supply chain from production to end‑of‑life. While round‑trip efficiency figures remain undisclosed, the chemistry is inherently low‑cost for durations beyond 12 hours, where lithium‑ion costs rise linearly with storage time. Analysts expect the levelized cost of storage (LCOS) to undercut lithium‑ion in the multi‑day segment, making iron‑air an attractive option for utilities facing prolonged renewable lulls.

The pilot arrives as Europe accelerates its renewable‑energy targets and seeks to close the multi‑day storage gap. Competitors such as Form Energy in the United States and Ireland’s FuturEnergy are also pursuing iron‑air projects, but Ore Energy is currently the sole European operator with in‑house manufacturing in Amsterdam and plans for a dedicated plant by 2027. Policy frameworks like the EU’s Storage Research Infrastructure and growing utility interest suggest a fertile market for LDES. If the forthcoming performance data confirm reliability and cost advantages, iron‑air could become a cornerstone of Europe’s decarbonisation strategy, complementing short‑duration batteries and emerging hydrogen solutions.