A self-contained conveyable power unit for producing 12V/24V, 110V AC, and 220V AC electricity at a desired location independent of external power sources integrates within one weather-resistant molded nonmetallic material based housing a power generating device of a selectable combination of a renewable energy type and power storage devices. Additional optional power generating devices, renewable or of traditional fuel type, can be contained within or coupled to the housing. The system and housing are modular and configured to produce power using any combination of renewable and non-renewable energy resources. Given its molded composite material construction and scaleable design, the appliance may be readily fabricated in a variety of sizes for varied applications. Further, the molded housing of composite material construction is designed for resistance to the elements, light weight and strength.