The Kruonis Pumped Storage Plant is a hydroelectric power station located in Lithuania. It plays a crucial role in balancing electricity supply and demand by storing energy. The plant uses two reservoirs: one at a higher elevation and another at a lower elevation. During periods of low electricity demand, excess energy is used to pump water from the lower reservoir to the upper one. When electricity demand increases, the stored water is released back down, driving turbines to generate electricity. This process allows the plant to quickly respond to fluctuations in energy needs, making it an essential component of the Lithuanian energy system.