Iron is abundant, low-cost, and inherently safe. By pairing iron with ambient oxygen, FeRON enables multi-day energy storage without exotic materials, allowing grids to ride through renewable intermittency at a fraction of lithium-ion or flow battery cost.

Iron-air chemistry: the future of low-cost long-duration storage

Iron-based batteries leverage India's abundant domestic iron supply for grid-native, multi-hour energy storage. FeRON's metal-air architecture avoids lithium import dependency while enabling safe, aqueous chemistry for utility yards and industrial campuses.

India-first supply chain

Built on abundant iron for resilient, local sourcing.

Safer chemistry

Non-flammable, aqueous system with no thermal runaway.

Multi-day duration

Designed for hours-to-days of deep grid backup.

Lower CAPEX

Commodity materials and simple stack architecture reduce cost.

Grid-ready performance

Optimized for renewable smoothing, firming, and black-start.

Making Rust Reversible

Our technology transforms a naturally one-way process into a rechargeable energy storage cycle. During discharge, iron reacts with oxygen and water to form iron hydroxide or rust-like discharge products while releasing electrical energy. During charging, the engineered electrochemical system drives the reaction in reverse, regenerating metallic iron and completing the storage cycle.