According to one aspect of the invention, a UPS includes an input configured to be coupled to an AC power source, a DC power source, an output configured to receive power from at least one of the AC power source and the DC power source, a first switched receptacle outlet coupled to the output and configured...http://www.google.es/patents/US8164220?utm_source=gb-gplus-sharePatente US8164220 - Apparatus, system and method for a UPS
