ACCIONA Energía To Add 33 MW Battery Storage Capacity Across Two Spanish Projects

ACCIONA Energía has announced plans to develop two new battery energy storage system (BESS) projects in Spain, strengthening its efforts to support renewable energy integration and improve grid stability. The projects, located in the provinces of Cuenca and Palencia, are expected to be fully operational by the end of 2027.

The first project will have an installed capacity of 20 MW and a storage duration of two hours, providing 40 MWh of energy storage. It will be developed next to the 50 MWp Bolarque solar photovoltaic plant in Villalba del Rey, Cuenca.

The second project will have a capacity of 13 MW and two hours of storage, equivalent to 26 MWh. It will be located near the 22 MW El Cuadrón wind farm, situated across the municipalities of Hornillos de Cerrato and Torquemada in Palencia.

The two projects will allow ACCIONA Energía to store electricity generated during periods of high renewable production and release it when demand increases or renewable generation declines. This capability can help manage the variability of solar and wind power while supporting a more stable and flexible electricity grid.

By placing the battery systems close to existing renewable energy facilities, the company aims to improve the utilization of clean power, reduce dependence on fossil-fuel-based generation and contribute to Spain’s energy security.

ACCIONA Energía has significant experience in battery storage technology. In 2017, the company commissioned Spain’s first grid-connected hybrid battery storage system at a wind farm in Barásoain, Navarre. The company also introduced second-life electric vehicle batteries into its storage operations in 2024 at the Extremadura III solar complex in Almendralejo.

Its international storage portfolio is also expanding. In the United States, ACCIONA Energía operates the 190 MW/380 MWh Cunningham battery storage facility in Texas. In Chile, the company is developing a 200 MW/1 GWh storage system linked to the Malgarida solar plant. It has also announced a 196 MW/980 MWh battery project at the El Romero solar plant, which is expected to begin operations by the end of 2027.

The new projects in Cuenca and Palencia further demonstrate ACCIONA Energía’s strategy of combining renewable generation with energy storage to support the transition toward a more flexible and reliable power system.