Noon

Noon Energy develops ultra-long duration energy storage systems using groundbreaking reversible electrofuels technology that stores electricity in abundant carbon-based media rather than mined critical metals. The battery system uses reversible solid oxide fuel cell technology to convert between electricity and stored chemical energy, with separate charge and discharge tanks holding carbon-based storage media. Noon delivers 100+ hours of uninterrupted clean power regardless of weather conditions, achieving a system cost below $20/kWh and producing clean firm power at approximately 6 cents per kWh. The technology offers 3x higher energy density than lithium-ion alternatives, requiring a significantly smaller footprint, and uses less than 1% critical materials compared to lithium-ion batteries, ensuring supply chain security and energy independence. The system is modular and scalable for multi-day to seasonal storage applications across commercial and industrial facilities, microgrids and islands seeking decarbonization, and data centers and grid-scale operations requiring resilient energy systems. Founded in 2018 and headquartered in Palo Alto, California, Noon has raised $31 million in Series A funding from investors including Prime Impact Fund, At One Ventures, Clean Energy Ventures, Aramco Ventures, Emerson Collective, and TechEnergy Ventures.