Solar PV for Devon & Cornwall Homes

Generate your own electricity, reduce your energy bills, and understand what’s realistic for your property.

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Why homeowners install solar

Lower electricity bills

Generate your own power and reduce how much you buy from the grid.

Earn from excess energy

Get paid through the Smart Export Guarantee (SEG) for electricity you export to the grid.

Increase home value

Homes with solar panels are often more attractive to buyers.

How does solar work?

Solar panels convert sunlight into electricity. This power can be used in your home, stored in a battery, or exported to the grid for payment.

Devon and Cornwall generally have excellent solar potential due to good sunlight hours.

[ Image: How Solar PV Works ]

Roof suitability

Best roofs for solar

  • • South-facing (ideal)
  • • South-east or south-west facing (very good)
  • • Minimal shading from trees or buildings
  • • Good roof condition and structural integrity

What if my roof isn’t perfect?

East or west-facing roofs can still work well. Flat roofs are also possible using mounting frames.

Should you add battery storage?

A battery stores excess electricity generated during the day so you can use it in the evening. This significantly increases how much of your own solar power you actually use.

While batteries add cost, they are becoming more popular — especially for homeowners who want to maximise self-consumption and reduce reliance on the grid.

[ Image: Solar Panels on a South West Home ]

Costs and potential savings

Typical costs (2026)

  • • 4kW system: £6,000 – £8,500
  • • 6kW system: £8,000 – £11,000
  • • Battery (5–10kWh): £4,000 – £8,000

Potential savings

A typical 4–6kW system in Devon or Cornwall can generate between 3,800 – 5,700 kWh per year. Many households see a reduction in electricity bills when including SEG export payments.

Government Incentives

Want to know what solar could do for your home?

Use our Solar Estimator to see estimated system size, generation, and savings. Or try the Combined Estimator if you're also considering a heat pump and underfloor heating.

Use the Solar Estimator Try the Combined Estimator