A power supply is an electrical device that supplies electric power to an electrical load. ... The source of power may come from the electric power grid, such as an electrical outlet, energy storage devices such as batteries or fuel cells, generators or alternators, solar power converters, or another power supply . Specifications: Output Frequency : 47-63Hz Model Number: HRP-600-24 Is allocated: Yes Output Type : One Output power : 648W Output Current : 0-27A Output Voltage : 24V Dimension : 218 * 105 * 63.5mm (L * W * H) Package Includes: 1 x 24V 27A Single Output AC DC Switching Power Supply