Most home solar systems are “grid-tied” meaning that the solar system, home electrical system, and local utility grid are all interconnected, typically through the main electrical service panel.
Connecting these systems means you can power your home with solar electricity during the day and grid electricity at night. It also means your solar system can push excess electricity onto the local grid to power surrounding systems, like your neighbor’s house.
Through net metering, you earn credit for excess solar production that can be used to offset the grid electricity you use at night.