Savings calculator
What could you stop paying for?
Move the sliders for a rough annual figure. A real survey gives you the accurate number — this is a starting point, not a quote.
£0
Estimated saving per year
0kWh generated a year
0%of that used at home
£0off a typical month
0kgCO₂ avoided a year
Illustrative only. Based on roughly 950kWh generated per kW installed per year in the UK, and the electricity price you set above. Check your latest bill for your actual unit rate — your survey will give you real figures for your roof.
How the maths works
What's behind the number
GenerationAround 950kWh per kW installed per year, adjusted for orientation and shading.
Self-useRoughly a third of generation is used at home without storage. A battery, iBoost or EV charger pushes that much higher.
ValuePower you use is worth the unit price you'd have paid. Power you export is worth a fraction of that.
Capped honestlyThe figure can never exceed what you actually spend on electricity.
Not a quoteYour roof pitch, shading and usage pattern all move the real number.
Free to check properlyThe survey and design cost nothing.
Free design and survey
Tell us about your property and we'll come back with a system design and an honest set of numbers.