Independent · For UK homes · Free
Home Energy Savings Calculator
A neutral, independent calculator for UK home energy investments: solar, battery, EV charging, hot water, heat pump and air-to-air aircon. Model real payback and ROI for one technology or any combination, including how they interact.
If an option won't pay for itself within 25 years, the results say so.
Start your calculationFree to use. No installer bias: the calculation never favours a partner.
- Solar panels
- Home battery
- EV charging
- Hot water
- Heat pump
- Air-to-air aircon
How it works
- 1
Tell us about your home
Your roof, your tariff and how you heat your home. A postcode can fill in the roof for you.
- 2
Pick what to model
One technology or any mix of them. The calculator works out how they share your solar and cheap-rate power.
- 3
See what pays back
Every combination ranked by what it saves over 25 years, including the ones that don't pay for themselves.