Patent ID: 7687936
Filing Date: 2010-03-30
Classification: H02J

Abstract:
1. An uninterruptible power supply comprising: an input connector for receiving AC power; a charger circuit coupled to the input connector and operable to produce a DC output; a battery coupled to the charger circuit; an inverter coupled to the battery and configured to produce an AC power; a first electrical outlet for delivering AC power; a second electrical outlet for delivering AC power; a first switch for selectively coupling the first electrical outlet to the input connector and the inverter; a second switch for selectively coupling the second electrical outlet to the input connector and the inverter; a controller configured to determine the existence of an interruption in a supply of AC power to the input connector, to detect the depletion of energy stored in the battery, to determine a restoration of the supply of AC power to the input connector, and to control the first switch and the second switch such that AC power is provided to the second electrical outlet a predetermined amount of time after AC power is provided to the first electrical outlet, the predetermined amount of time equal to ten or more seconds; and a housing configured to fit within a structured wiring box, wherein the housing encloses the charger circuit, the battery, the inverter, the first switch, the second switch, and the controller.