Offset your electricity costs
When your solar power system generates more electricity than your home can immediately use, your excess power flows back to the utility grid and your meter literally spins backward! Most utility companies will pay or credit you for this electricity.
Your solar power system produces the most electricity during the middle of the day, during "peak" hours when the utility rates are at their highest. This is to your advantage, because you can sell excess electricity at high peak rates in the afternoon, and buy electricity back at lower "off-peak" rates at night. You buy low and sell high! This is referred to as "net metering" and can lower your electricity bill even furthe