Most solar systems are connected to the electric grid. This allows you to provide power to the grid when your home’s production is greater than your usage and use power from the grid when it isn’t. Net metering is a policy that accounts for this flow of electricity between your home and the electric grid.
Net metering allows you to offset your energy consumption with your energy production. When your solar panel is producing electricity your electric meter runs backwards. When you’re more power than your system generates, your electric meter runs forward. At the end of the month, your final electric bill is your total usage minus the electricity that your solar panels produced. This doesn’t affect surcharges, which everyone has to pay. So if you make more electricity than you use at the end of the month, you should expect your minimum bill to be $13 (the distribution surcharge).
If at the end of the month you have generated more electricity with your solar panels than you have used, you can roll over this credit on your bill to the next month, just like ‘rollover minutes’ for your cell phone. With net metering, you get full credit for periods of excess solar production.