What happens during a blackout?

Grid-tied
A grid tied solar electric system with no batteries will automatically shut down in the event of a utility outage.You will not have backup power.Once utility power is restored the solar system will automatically reconnect to the grid and start to produce power when the sun shines. This is a fully automatic operation.

Battery Based Grid tie
This is a grid-tied system with a battery backup. This system will give you limited backup power in the event of a utility outage. The system charges the batteries from the sun,wind,utility,etc. When the batteries are fully charged the excess power will feed into the grid and spin your meter backwards.   With a battery based system the duration of the backup capacity is dependent upon the size of the battery bank, the state-of-charge at the time of the blackout.