What is your roof worth? One building, one number, about thirty seconds.
Enter your building address for an instant, data-backed estimate of system size, annual saving, payback and 25-year value.
Free, and no sign-up to see your estimate
- 438 kWp
- typical warehouse system
- £65k
- average saving a year
- 4–9 yrs
- typical payback
What you get back · illustrative
A 5,000 m² warehouse Leicestershire
- 441 kWp
- system size
- £63,148
- benefit a year
- 6.3 yrs
- payback
- £2.2m
- 25-yr gross benefit
Frequently asked questions
How does the commercial solar savings calculator work?
Enter your building's address and we match it to your building to estimate system size, annual saving, payback and 25-year value. If we can't find it automatically, enter an approximate roof or floor area.
Is the savings calculator free?
Yes. It's free and needs no sign-up to see your estimate. To get matched with local installers for firm quotes, you create a free account.
How accurate is the estimate?
Estimates are modelled from official UK building and energy data using Sunseam's default assumptions (you can change the electricity price, export rate and installed cost in the calculator), then a local installer confirms the exact figures for your building. The avoided-bill saving is capped at your building's own electricity bill, with export income shown separately on top, and self-consumption is modelled per building.
Looking for ranked commercial roofs to target? Explore commercial solar opportunities by region.