Most residential and light commercial grid-tied solar systems need utility power to operate, so they won’t function during a grid outage. This animated video illustrates how Morningstar’s TriStar MPPT 600V Controller with DC Transfer Switch can be used with other components to charge battery systems to provide backup power to run your critical loads when the grid goes down. This is a clean, economical, scalable solution that does not compromise your solar system’s efficiency. You can install this system so that your backup power turns on immediately when an outage occurs. And you can maintain backup power by then switching on the controller to provide charge to your batteries. So your PV array can be used to power your sump pump, refrigerator, TV, cell phone, computer, and the lights that you need.