Solar Panels in St Austell, Cornwall
This coastal community in Cornwall has a solar yield of 1078 kWh/kWp (among the highest in the UK). A 4kWp system generates approximately 4,312 kWh annually, covering 113% of average household electricity use and saving an estimated £1207+ per year. With 0% VAT on installation, a typical 3-4kWp system costs £5,000–£8,000 with payback in 6–8 years.
St Austell solar irradiance and generation figures
| Solar Metric | Value |
|---|---|
| Solar Yield | 1078 kWh/kWp |
| 4kWp System Output | 4,312 kWh/yr |
| Sunshine Hours | 1,890 hrs/yr |
| Est. Annual Savings | £1207+ |
| Household Coverage | 113% of avg use |
Solar yield calculated for St Austell (50.34°N, 4.79°W) using PVGIS satellite data. Actual output varies by roof orientation, shading, and system specification.
St Austell at a Glance
| Area Data | Value |
|---|---|
| Population | 35,000 (Census 2021) |
| Elevation | 80 metres |
| Postcode Area | PL25 |
| Location | Coastal |
| Coordinates | 50.3390°N, 4.7872°W |
Population and housing data: ONS Census 2021.
Renewable Energy Potential in St Austell
St Austell is a town in Cornwall with a population of 35,000 (ONS Census 2021). St Austell's coastal position means good exposure to sunlight, though installations should account for higher wind loads and salt air. The postcode area for St Austell is PL25. You'll need your full postcode when getting quotes from MCS-certified installers. Based on satellite data for this location, a 4kWp solar system generates approximately 4,312 kWh per year (1078 kWh/kWp). Cornwall ranks #1 in the UK for solar yield, making St Austell an excellent location for solar panels.
Why Go Solar in St Austell?
Save on Electricity Bills
Homeowners in St Austell can save an estimated £1207+ per year on electricity with a 4kWp solar system generating 4,320 kWh annually.
0% VAT on Installation
Residential solar panel installations are zero-rated for VAT in the UK, saving you hundreds of pounds on a typical system.
MCS Certified Quality
All installations use MCS-certified installers, ensuring high standards and eligibility for the Smart Export Guarantee (SEG).
Earn from Excess Energy
Sell surplus electricity at 3-15p/kWh through the Smart Export Guarantee (SEG). Your energy supplier pays you for every unit exported to the grid.
Coastal Location Advantage
St Austell's coastal position often means fewer obstructions and clearer horizons for solar exposure. Modern panels are designed to withstand coastal conditions including salt air.
25+ Year Lifespan
A system installed in St Austell today will generate clean electricity for 25-30 years with minimal maintenance.
Solar Panel Costs for St Austell Residents
Homeowners in St Austell, Cornwall benefit from 0% VAT on solar panel installations. Typical system costs for 2026:
| System Size | Typical Cost (incl. 0% VAT) | Est. Payback |
|---|---|---|
| 2 kWp | £3,000 - £4,500 | 7-8 years |
| 3-4 kWp | £5,000 - £8,000 | 6-8 years |
| 5-6 kWp | £7,000 - £10,000 | 6-7 years |
Solar Installers in Cornwall
MCS-certified solar panel installers covering Cornwall.
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St Austell solar panel questions answered
How much do solar panels cost in St Austell?
A 3-4kWp system in St Austell typically costs £5,000-£8,000 with 0% VAT. The system generates approximately 4,320 kWh/year, paying for itself in 6-8 years.
How do I get the best deal on solar panels in St Austell?
Get at least 3 quotes from MCS-certified installers. Check they are registered with MCS at mcscertified.com. Compare pricing, equipment brands, and warranties. Ensure your installer handles the DNO notification (G98/G99 application).
What happens to my solar panels if I move house in St Austell?
Solar panels stay with the property as a permanent fixture. They add value to your home for the next buyer. Your installer can transfer monitoring accounts to the new owner.
Can I get solar panels on an east or west facing roof in St Austell?
Yes. East or west-facing roofs still produce 80-85% of the output of a south-facing roof. Many installers recommend splitting panels across east and west to spread generation throughout the day, which can actually improve self-consumption.
Do solar panels work in winter in Cornwall?
Yes, solar panels generate electricity all year round. While output is lower in winter, Cornwall still receives usable daylight hours even in December. Annual generation figures (4,320 kWh for a 4kWp system) already account for seasonal variation.
Do solar panels increase property value in St Austell?
Yes. Solar panels improve your EPC rating and can increase property value by up to 4%. Buyers increasingly look for energy-efficient homes with lower running costs. A solar system in St Austell is a long-term investment in your property.
Can I add a battery to my solar system?
Yes. A home battery (typically 5-10 kWh) stores excess solar electricity for evening use. This increases your self-consumption from around 30-40% to 60-80%. Batteries currently cost £3,000-£6,000 and also benefit from 0% VAT.
Sources
- MCS — Microgeneration Certification Scheme
- MCS — Find a Certified Installer
- Ofgem — Smart Export Guarantee (SEG)
- PVGIS — EU Joint Research Centre (solar irradiance data)
- ONS — Census 2021
- Met Office — Climate Data
Last updated: March 2026
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
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