Net metering, or net energy metering (NEM) is a billing mechanism that enables you to send extra solar energy your solar panels generate beyond what your home can consume at the moment back into the electric grid. In return, you earn credit that you can use to offset the cost of electricity you pull from the grid in the future. The value of the credit depends on how electricity rates and net metering policies are structured in your utility.
The vast majority of Pennsylvania residents receive electricity from investor-owned utilities. These utility companies are required by state regulations to offer 1-to-1 net metering credits. This means the credit received from solar panels in PA is the same value the utility charges you for electricity. However, competitive electric suppliers are not required to offer net metering credits. It’s recommended to return to your utility provider (PECO, Duquesne, PPL, MetEd, etc) for supply if installing solar to maximize savings.