the unconsumed excess energy that your solar panels produce during the day can be stored and used to power your house at night. The same principle applies to the scheme known as net metering ...

The cell keeps generating electricity, even on cloudy days, until the sun goes down at night. To see solar power in action, check out This Solar House.

We also installed roof jacks (to hold up the solar array) and then a new composite shingle roof. Finally, in July, we put in a whole-house cooling ... and oil for a gas-powered car, would have ...