How Home Battery Storage Works

A home battery quietly stores electricity so you can use it at the moment that suits you best. It charges up when energy is cheap or free — from your solar panels during the day, or from the grid during off-peak hours — and then powers your home later, when electricity would otherwise cost more.

Everything happens automatically in the background. There is nothing for you to switch on or off; your home simply draws on the stored energy first before buying anything from the grid.

If you have solar panels, they often generate more electricity during the day than your home is using. Without a battery, that surplus is simply sent back to the grid. A home battery stores it instead, so you can use your own free energy in the evening and overnight rather than buying it back at a higher price.

Through the cheaper hours — whether that is a sunny afternoon with your solar panels, or the early hours on an off-peak tariff — your battery quietly fills up. Then, as the day goes on and energy gets more expensive, your home draws on that stored power instead of the grid. It is a simple cycle that lowers your bills a little every single day, without you having to think about it.