Energy storage is a device or system for the storage of thermal or electrical energy. Currently, energy storages are mainly considered in the context of electricity storage and cooperation with photovoltaic installation. They store excess electricity produced by photovoltaics for use at a later date. The most common storage on the market today is equipped with lithium-ion batteries - efficient and long-lasting compared to other battery types.
Energy storage facilities support grid stability, increase energy independence and allow for more efficient use of renewable energy sources.