Zero Terrain

Founded in 2009, Zero Terrain is a private company headquartered in Tallinn, Estonia with approximately 11-50 employees specializing in Energy Storage.

Zero Terrain is an EU-based energy infrastructure development company established in Estonia in 2009. The company originates, structures, and develops large-scale pumped hydro energy storage projects that enable the integration of renewable energy into electricity systems. Zero Terrain's proprietary technology creates underground pumped hydro storage facilities with underground lower reservoirs, eliminating the need for specific topography. The company's flagship project, Energiasalv, is a 500 MW underground storage facility in Paldiski, Estonia scheduled to begin operations in 2026. Zero Terrain works with local developers, technical experts, investors, utilities, and industrial customers to deliver bankable energy assets that provide long-duration storage, grid stability, and lower electricity costs.