The APC Universal Transfer Switch (UTS) is a fully automatic transfer switch for use in optional standby systems in homes or small businesses. This unit provides safe, convenient power for up to six circuits in the home or office. Power is derived from one or two independent backup sources with backup sources being a generator, an uninterruptible power supply (UPS), a solar inverter, or another alternative energy source. When connected to home appliances, computers or entertainment equipment, the backup power sources provide power during utility power outages. When a UPS is used in the configuration, connected equipment (load), is protected from utility brownouts, sags, surges, and power outages. The UPS provides continuous power from the internal battery until utility power returns to safe levels or the battery is fully discharged.