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How Residential Solar Power Works

1. Solar Modules

Solar modules mounted on the roof or grounds of your property convert sunlight into DC power.

2. Inverter

This power is sent to a device called an inverter (or power converter) which converts the DC power from the solar modules to AC power identical to that being sent to you from the utility grid.

3. Electrical Panel

Power travels from the inverter to your electrical service panel (your breaker box). The power from the electrical panel will be distributed to any electrical loads in your home.

4. Utility Meter

When excess power is produced by the solar, the power will flow into the grid through your electric meter. This will cause your meter to run backwards gaining you a credit with the utility company.

5. Utility Grid

The utility grid automatically provides electricity when needed — at night and during the day when your demand exceeds your solar production.

Net Metering

Net metering legislation states that the utility company must credit you at retail rates (the same rate they would have charged you). Therefore, time of use customers will be credited peak rates for power fed into the grid during peak hours (Please note that San Diego does not currently have a time of use rate schedule that benefits SDG&E customers).