solar electric systems and your utility meter
When you are using electricity from the gird, your meter spins forwards in the normal direction. On the flip side, when you install a grid connected solar electric system and you produce more then you are using, your electric meter will spin backwards! Although before installing you solar electric system be aware of the type of meter you have on your home or business, because some older electric meters records the number of time the meter spins and does not register if the meter is spinning backwards or forwards.
In this case if you do not have a “two-way” meter you would be billed for the power you contribute to the grid, yikes! Most locations have two-way meters although if you are unsure, call your utility company to confirm. If you find out you only have a one-way meter, you can always upgrade your meter.