Why solar panels work best in Cornwall
Cornwall receives 1,298 kWh/m² of solar irradiance per year — 19% above the UK national average and the highest of any English county. A typical 4kW system in Truro, St Austell or Newquay will generate 3,800-4,200 kWh/year, compared with 3,200-3,500 kWh for the same system installed in Manchester or Leeds.
Combined with Cornwall's mild coastal climate (solar panels lose efficiency above 25°C) and long daylight hours in summer, the county is the UK's single best location for domestic solar. Pair your panels with battery storage and a time-of-use tariff like Octopus Flux, and you can cut electricity bills by 75-90%.
Solar panel costs in Cornwall (2026 prices)
| System size | Panels | Installed cost (0% VAT) | Annual generation | Best for |
|---|---|---|---|---|
| 3kW | 8 | £5,200-£6,200 | 2,900 kWh | Low-usage household |
| 4kW | 10-11 | £6,500-£7,500 | 3,900 kWh | Typical Cornwall home |
| 6kW | 15-16 | £8,500-£10,000 | 5,800 kWh | Heat pump or EV owner |
| 10kW | 25 | £13,000-£16,000 | 9,700 kWh | Off-grid / holiday let |
Solar panel grants available in Cornwall
- 0% VAT on all domestic solar, battery and heat pump installations until 31 March 2027 — typical saving £1,000-£3,200 off a full system.
- Smart Export Guarantee (SEG) — Octopus Outgoing Flux pays up to 25p/kWh for exported electricity.
- ECO4 funding — up to £14,000 available for eligible low-income households via Cornwall Council partner schemes.
- Boiler Upgrade Scheme — £7,500 grant for air source heat pumps (paired with solar for maximum efficiency).
See all Cornwall solar panel grants →
Areas we cover in Cornwall
We install across the whole of Cornwall — from the Isles of Scilly to Liskeard, from Launceston to Land's End. Our most popular towns:
Cornwall homeowners love their solar
"CCS installed our air source heat pump and the whole process was brilliant from start to finish. They handled the BUS grant application, and our heating bills have dropped significantly. The house is warmer than it ever was with our old oil boiler."
James & Sarah T.
St Austell · Air Source Heat Pump
"Had solar panels installed by CCS and could not be happier. Professional team, tidy work, and they explained everything clearly. Already generating more electricity than we expected, and the Smart Export Guarantee payments are a nice bonus."
David M.
Bodmin · Solar Panels
"Our old boiler gave up in February and CCS had a new Worcester Bosch fitted within days. Excellent service, fair price, and the engineer was polite and thorough. Highly recommend to anyone in Truro and the surrounding area."
Helen P.
Truro · Boiler Installation