Hybrid power systems are designed for the generation and use of electrical power. They are independent of a large, centralized electricity grid and incorporate more than one type of power source. They may range in size from relatively large island grids of many megawatts to individual household power supplies on the order of one kilowatt.
Hybrid power systems that deliver alternating current of fixed frequency are an emerging technology for supplying electric power in remote locations. They can take advantage of the ease of transforming the AC power to higher voltages to minimize power loss in transferring the power over relatively long distances. Isolated AC systems include at least the following: conventional AC diesel generators, an electrical distribution system, and distributed AC loads. A hybrid system could also include additional power sources such as renewables (wind turbines, photovoltaic panels) and storage. Note that storage is actually both a source and a load.