A battery only saves money on electricity you would otherwise buy at night. Enter your overnight use, your spare solar and the battery price to see how much it would shift each day and how long it takes to pay back. There is more detail in our guide on sizing a home battery.
What the battery would do
$0
estimated saving in the first year
Solar charging is derated 15% for cloudy days and winter. When a free window is ticked, the battery fills from the grid in the window first and your solar is exported instead. A battery can only shift what you'd otherwise buy at night, so it is capped by your overnight use.