Energy Storage

This is a book on energy storage. Most electrical energy is AC, and is used when generated. Direct current is stored in battery, but there is no such things as an AC battery. There are other ways to store the energy, tho. Solar cells only produce electricity during the day, and we might need there energy at night. Hydro power system generate power when there is a sufficient amount of water flow. Nuclear plants generate power as needed. Power from geothermal wells is generally available 24x7.