It’s up to the states to decide I guess. In my state, the local power company lets you use what you need and then sell what you don’t use at whole sale rates.

It’s up to the states to decide I guess. In my state, the local power company lets you use what you need and then sell what you don’t use at whole sale rates. They will send you a check if you produce more than you consume. I’m not sure if you had to pay for the meter but they would install one.