Explore these tools
Solar and home-energy planning tools. Choose a tool below and enter the details for your task. Each calculator explains its inputs and shows the result in your browser.
Tools and calculators
Solar Panel Calculator
Estimate system size, panel count, cost, SEG income and payback for a UK home.
Solar Battery Calculator
Estimate home battery size, cost, savings, payback and backup time.
Appliance Electricity Cost Calculator
Calculate appliance kWh and running cost per hour, month and year.
Choosing the right calculator
Plan solar production, battery storage and household electricity use. Compare scenarios using your actual consumption and price assumptions.
Compare the available tools before you start. For a useful result, check the units, assumptions and any optional settings in the calculator you choose.