Article

Moonwatt will deploy a sodium-ion battery energy storage system designed for hybrid solar plants at Cleantech Park Arnhem in the Netherlands in 2026. This modular 'string battery' system features passive cooling and is DC-coupled to solar panels via a hybrid inverter, addressing solar plant hybridization challenges, including cost reduction and performance improvement.

The company has secured a €1.15 million DEI+ grant from the Dutch Business Agency, recognizing the innovative nature of its technology. Moonwatt's solution emphasizes scalability, allowing projects to expand from kilowatts to gigawatts. The sodium-ion chemistry provides enhanced thermal stability and longevity, while the passive cooling system minimizes maintenance needs and operational costs.