Abstract: An apparatus and method for supplying alternating current power to electrical devices wherein a subpanel having a plurality of switches allows a user to preset selected electrical devices for either automatic or manual load pick up by a battery during a utility power loss. Battery power is supplied only to predetermined electrical devices so as to avoid overload of the battery.
Abstract: A power supply system for a sump pump including a transformerless inverter circuit with a plurality of MOSFET transistors for powering the pump using either available utility-supplied power or stored power from a battery.