Abstract: The object of this application is a solar power supply designed to furnish sinusoidal varying alternating current to a load under normal and emergency conditions. The machine performs at least four different operations including DC to AC power inverting, automatic transfer switching between inverter and incoming AC power, automatic three stage battery charging, battery bank charging. The machine is equipped with solar panels and a power charger that make it usable for extended periods of time both during normal and emergency operations.