Check the numbers before you sign
Upload 1–5 commercial solar proposals and we'll independently compare the pricing, projected generation, assumptions, scope, warranties and exclusions.
How it works
- 1. Tell us about the project. Postcode, building ownership, roof condition, electricity usage.
- 2. Upload your proposals. PDF proposals from the installers you've spoken to, plus an electricity bill or half-hourly data if you have it.
- 3. We review them. A reviewer works through the checklist below and, where site information allows, checks generation claims against an independent estimate.
- 4. You get a report. A clear, structured comparison with the questions you should ask each installer before signing.
We'll confirm the expected turnaround once we've reviewed what you've sent. See our full review methodology.
Ready to start?
No obligation to use an installer we introduce you to.
Upload My Solar QuotesWhat we check
System
Size, modules, inverter, mounting, batteries — what's actually specified.
Price
Total cost, £/kWp, what's itemised and what isn't.
Generation
Claimed annual output and specific yield, checked against an independent estimate where site data allows.
Self-consumption & savings
The assumptions behind projected savings, and whether they look conservative or optimistic.
Lifetime costs
Whether O&M, monitoring, inverter replacement and insurance are accounted for.
Scope
What's included and excluded — grid connection, structural work, scaffolding, commissioning and more.
Warranties
Module, inverter, battery and workmanship warranties, exactly as written.
Payment terms
Deposit, staged payments and what triggers final payment.