 The pico hydro sites in Kenya won Ashden Awards for Sustainable Energy.Using a pumped-storage system of cisterns and small generators, pico hydro may also be effective for "closed loop" home systems.In Vietnam, several Chinese manufacturers have sold pico-powerplants at prices as low as $20–70 for a powerplant of 300–500 W. However, the devices sold are said to be low in quality and may damage connected equipment if connected improperly.