Tools
Commercial Solar Calculator
Draw your roof on a map, get an AI-generated solar feasibility report and downloadable PDF in under 90 seconds. No login, no obligation.
Commercial solar, modelled in 90 seconds
Rooftop solar is one of the most direct ways for a UK business to cut its exposure to grid electricity prices. This tool gives you a fast, no-obligation feasibility estimate for your own premises before you commit to a survey or a quote.
Draw your roof, add your consumption if you have it, and you get an indicative system size, annual generation and a downloadable report. Our team can then model the numbers precisely against your actual usage and your energy contract.
What your report includes
- Usable roof area and an indicative panel capacity
- An estimated annual generation figure for your site
- A first look at how much grid import solar could offset
- A downloadable PDF you can keep or share internally
Related business energy tools
Solar works best alongside the right supply contract. Check who currently supplies your site, then we can tender your renewal:
Solar calculator: frequently asked questions
What does the commercial solar calculator do?
It gives a fast feasibility estimate for solar on your business premises. You draw your roof on a map, and the tool models the usable area, an indicative panel capacity and a likely annual generation figure, then produces a downloadable report. It is a first-look feasibility check, not a formal engineering design.
Is the solar calculator free to use?
Yes. It is free, needs no login and carries no obligation. You can run it for any UK commercial site as many times as you like.
Do I need my electricity bill to use it?
No. You can run a feasibility check from your address and roof outline alone. Adding your annual electricity consumption from a recent bill makes the self-consumption and payback estimates more accurate, but it is optional.
Will solar lower my business electricity bills?
Solar generates electricity on site during daylight hours, which offsets units you would otherwise import from the grid at your contract rate. How much you save depends on your roof, your consumption pattern and your tariff, so the report gives an indicative figure and our team can model it precisely against your actual usage.
Does my roof suit solar panels?
Most flat roofs and south-facing pitched roofs on commercial buildings are suitable. The calculator accounts for the area you draw and its orientation. Shading, roof age and structural loading also matter, and a full survey confirms these after the feasibility stage.
What happens after I get my solar report?
The report is yours to keep, with no obligation to proceed. If you want to take it further, our team can arrange a detailed survey, model the financials against your energy contract and advise on procurement.
Can I combine solar with a better electricity contract?
Yes, and the two work together. Solar reduces the volume you buy from the grid, while a well-timed electricity contract reduces the price of what you still import. Use our business electricity and gas supplier finders to confirm who currently supplies your site, and we can tender your renewal across our supplier panel.
Turn your solar report into a plan
Get your feasibility estimate, then talk to our team about a survey, the financials and a supply contract that works with on-site generation.