Net metering is a policy that allows solar energy customers to receive credits for the surplus energy they produce and feed back into the grid. This is especially beneficial for solar panel owners as it offsets their energy consumption, potentially resulting in zero electricity bills. The credits are usually calculated and adjusted over a billing period, allowing users to draw from the grid when necessary, while selling excess energy produced during peak generation times back to the utility company. This process not only encourages the adoption of renewable energy but also contributes to a more decentralized energy system.