A plug-in battery stores the surplus energy from your solar panels so that you can use it later when the sun isn’t shining.
During the day, when your panels produce more than you use, that energy is stored in the battery. In the evening or on cloudy days, you simply use your own stored electricity.
The big advantage? You make the most of your own solar energy and avoid feeding it into the grid only to buy it back later. This means you don’t pay any distribution costs or grid tariffs on the electricity you’ve generated yourself.
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