To support large regions increasingly dependent on intermittent renewable energy, Stanford scientists are creating advances in fuel cells, hydrogen storage, flow batteries, and traditional battery cells for grid-scale and long-duration energy storage. . Energy from fossil or nuclear power plants and renewable sources is stored for use by customers. Grid energy storage, also known as large-scale energy storage, is a set of technologies connected to the electrical power grid that store energy for later use. These systems help balance supply and. . Large scale battery energy storage systems (BESS) are centralized energy storage installations, typically ranging from several megawatt-hours (MWh) to gigawatt-hours (GWh), designed to store electrical energy and discharge it back to the power grid when needed. As the world rapidly transitions towards cleaner energy sources, the need for efficient storage solutions has become increasingly critical.