Adding a battery to your solar panel system means you can store electricity generated during the day and use it later, rather than immediately exporting it to the grid. But deciding how much storage you need isn’t as simple as matching a battery to the size of your solar array.
Your household electricity consumption, when you use that electricity and whether you have a smart time-of-use tariff can all affect the overall calculation. What’s more, you may also need to think about future changes, such as installing a heat pump or buying an EV.
