About
About this calculator
This site helps UK households make a quick first-pass estimate of whether a home battery could be worth investigating.
What this site does
The calculator estimates the possible saving from charging a home battery using cheaper off-peak electricity and using that stored energy later when electricity is more expensive.
Why it exists
Home batteries can be expensive, and the numbers are not always easy to understand. This tool gives you a quick way to compare tariff rates, battery size, installation cost, efficiency and expected usage.
What it does not do
It does not provide a guaranteed financial forecast, regulated financial advice, a full solar model, or an installer quotation. It is designed to be a simple estimate before you spend more time researching options.