Net metering is a program offered by some utilities, like SCE, SDG&E, and other public utilities, which allows grid users to send unused electricity to the grid, then reclaim that energy when they need it, such as during the night or in the winter. Net metering uses a crediting system in which you earn energy credits for excess solar that you send to the grid, and your meter will “spin backwards”. Once a month, your utility company will review the energy that you use from the grid, and if there are any credits in your energy bank they will be shown on your bill and can be carried over to the next month. Many homes generate extra credits in the spring and summer, which can be stored in your energy bank and used to cover your bills through the winter months when your system does not produce as much energy.