SHINE

Elestor develops SHINE, a hydrogen–iron redox flow battery for long-duration energy storage (LDES). SHINE is designed to meet Europe’s rapidly evolving procurement, regulatory, policy and technical requirements whilst being cost-effective. Storage tenders and demand-side instruments increasingly require reduced dependence on critical raw materials (CRMs), PFAS-free designs, recyclability, European supply-chain resilience and longer storage durations. Incumbent technologies are inherently unable to meet this combination of requirements. SHINE directly addresses this emerging procurement gap with a scalable, European-made storage technology. The technology integrates a hydrogen (H2) gas circuit with a liquid iron-based electrolyte (FeSO4) circuit in a reversible electrochemical stack, combining the ultra-low marginal energy cost and scalability of abundant H2 and Fe with high roundtrip efficiency (≥75%). This architecture decouples energy & power, enabling economically attractive storage durations from multi-hour to multi-day, without dependence on scarce CRMs, use of PFAS and geographical or geopolitical constraints. After 12+ years of deep-tech R&D, Elestor has reached TRL 6 with HYRON, an integrated grid-connected pilot system (November 2025). Elestor is transitioning to first-of-a-kind (FOAK) and market-ready systems, supported by a manufacturability and cost-down technology roadmap, targeting a potential of 15€/kWh CAPEX and 0.02€/kWh LCoS. Elestor has attracted strategic and climate-focused investors, including Equinor Ventures, Vopak, InnoEnergy and InvestNL, and is building strong market pull with an active funnel of >144 GWh in the Hybrid PPA market and multiple contracted engagements. EIC support will accelerate the next demonstrator and FOAK deployments, certification readiness and manufacturability—closing the bankability gap, unlocking follow-on private capital, and enabling the scale-up of a European LDES champion that meets all procurement requirements.