How an Off Grid Solar
OFF GRID refers to a power system
that generates electricity such as a solar array.
The energy produced is stored in batteries and the
energy system isn't connected to the utility power
ON GRID refers to a energy power system that's
connected to the utility power grid. In the case of
a solar energy system, excess power from the solar
array, not used by the home/business is fed into the
utility grid and the utility meter records the power
excess as a credit. This excess is then used when
solar power is not available. Batteries aren't
needed in a on grid system.
GRID TIE WITH BATTERY BACKUP refers to a system that has all the advantages of both a grid tie system and an off grid system. When utility grid power is available the system works just like a standard grid tie system and sells excess power back to the utility. But unlike a standard grid tie system, when the utility power fails the battery backup allows the solar array to continue to supply the home with power during the day, and the batteries can supply select circuits within the home during the night. Once the utility grid starts up again the system automatically switches back to normal operation.