Home battery storage ROI calculator

Work out the payback on a home battery in the UK from the unit rates on your own bill.

Enter your day rate, off-peak rate and, if you have solar, what you are paid to export. The calculator then ranks home batteries you can buy in the Kilowatts shop and shows a 10-year return. A 5 percent yearly price rise is assumed. Results are a guide, not a quote.

• Annual electricity use and how much of it falls in the evening
• Solar generation, if you already have panels or you are installing them with the battery
• Day rate, off-peak rate and export rate in pence per kWh
• Shop price, payback year and a year-by-year saving table for the battery you select