01
Price per kWp
Dividing the total by solar array capacity creates one comparison measure. DESNZ-reported installation data puts the current UK median around £1,565 per kWp, with most straightforward domestic installs falling between roughly £1,500 and £2,200 per kWp. The measure becomes misleading when battery capacity, roof complexity, scaffolding or electrical work differ between quotes.
02
Scope completeness
The checklist records whether important items appear clear in the written quote. A tick does not judge quality — it simply helps expose what is missing or ambiguous.
03
This tool is a private worksheet
The calculator does not accept files and does not ask for contact details. Read the quote and enter only the few figures or ticks needed for your own browser-only worksheet. If you want quotes from vetted installers to compare against it, use the separate request-quotes form.