This system normally uses batteries to store electricity for nighttime usages like lights and fans. The larger the system, the more items you can power for your home or more electricity you can store in batteries for later use usually at night when the solar panels are not able to produce electricity.

You rely completely on the solar system to produce all your electricity. If you don’t create enough, you are in the dark, so be sure to assess your needs prior to installing your system. It is better to have some extra electricity in the batteries than not enough.