An apparatus and method for generating combined sources

PURPOSE: A supply apparatus and a method for generating combined sources are provided to reduce the fuel cost and the environmental pollution by generating electrical power through an alternative energy source, such as the lights of sun and wind power. CONSTITUTION: A power controlling unit outputs a generated power using natural energy and converts an AC(Alternating Current) power generated from a diesel generator into a DC(Direct Current) power to output it. A storing unit(84) stores the DC power outputted from the power controlling unit. An inverter(64) controls an additional power supply through the diesel generator according to the DC power outputted from the power controlling unit. An automatic switching unit(66) supplies the power generated through the natural energy to a load via the inverter(64). The automatic switching unit(66) further supplies the additional power to the load.