Metropolitan Industries’ DST50 is a three-phase, AC power, battery back-up system that provides stand-by power to a duplex pumping system or can be adapted for any three-phase motor application up to 5 hp. It is adaptable to run industrial loads related to pumping applications, machinery, manufacturing or anywhere that three-phase stand-by power is required. The DST50 utilizes line power until the system deems it unusable or a power outage occurs, then it will automatically switch to reserve power.