A solar panel on the roof, absorbs light from the sun to produce electricity, sufficient to power the home, and charge a battery in a generator. When rain clouds impede the sunlight or when nightfalls, the battery powered generator is automatically switched on, to power the home, and also power-up its own battery, so that if solar light for some reason does not happen to reach the home’s solar panel for a very long time, the generator can keep going.
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