Tools
Free calculators that use current UK prices and Ofgem's price cap, so you can see what solar, a battery, a heat pump or air con would cost and save in your home. Nothing to sign up for.
Solar Payback Calculator
Estimate how long a rooftop solar system takes to pay for itself.
Balcony Solar Savings Calculator
See the yearly saving and payback of an 800W plug-in balcony kit.
Plug-in Solar Registration Checker
Find your network operator and how to register your plug-in solar kit, free, within 28 days.
Heat Pump Running Cost Calculator
Compare a heat pump's yearly running cost against your gas boiler.
Heat Pump Suitability Checker
Check your home's EPC-based heat-pump suitability and £7,500 grant eligibility.
Battery Sizing Calculator
Find the right home battery size and estimate off-peak savings.
Power Station Sizing Calculator
See which portable power stations can run your appliances, and for how long.
Air Con Sizing Calculator
Work out the BTU your room needs and which portable and split units cover it.
Air Con Running Cost Calculator
See what an air conditioner costs to run per hour, per day and across a summer.