Solar costs
What should a solar quote
actually explain?
A useful quote connects system size and exact equipment to the work your property needs. Headline averages cannot capture that scope.
Illustrative model
Three usage levels, one consistent method.
These are calculator outputs for south-facing, unshaded examples—not market averages or offers. Your postcode, roof and survey will change them.
| Monthly electricity spend | Indicative array | Panels | Generation | Indicative installed cost |
|---|---|---|---|---|
| £70 | 3.96 kWp | 9 | 3,683 kWh/yr | £5,200–£6,500 |
| £120 | 6.6 kWp | 15 | 6,138 kWh/yr | £7,400–£9,300 |
| £200 | 10.12 kWp | 23 | 9,412 kWh/yr | £10,500–£13,000 |
Price drivers
The roof is only the beginning.
Roof access
Scaffolding, roof height, conservatories and access constraints can materially change labour and equipment cost.
Array design
Panel count, split roof faces, optimisers and cable routes affect both hardware and installation time.
Electrical work
Consumer-unit condition, earthing, meter location and grid-connection requirements must be checked.
Equipment
Panel, inverter and mounting specifications differ in warranty, capability, aesthetics and price.
Compare well
Ask what is included—and what is not.
Check scaffolding, mounting, electrical upgrades, monitoring, grid paperwork, warranties, expected timescale and payment terms before comparing totals.