https://www.altestore.com/store/solar-power-systems/grid-tied-solar-power-system-with-backup-c568/
Many people assume that if you have grid-tie solar, you will have power available when the grid goes out. This is usually not the case. If you have a grid-tie solar system, your solar system is required to disconnect itself from the grid to protect the lineworkers fixing the lines. Unless you have an inverter specifically designed to give you back-up power, you will lose power to your house when the grid goes out. We discuss some of the options available to provide backup for you when the lights go out.
Post time: Feb-11-2017