Solar panels in South West
Bristol, Somerset and Wiltshire — comfortably above the UK average.
Yield here
990
kWh per kWp per year
A 4 kWp system
3,960
kWh generated a year
Typical payback
6.9
years, south-facing
That is about 6% below Cornwall and Devon, the sunniest part of the UK — which sounds worse than it is. A 4 kWp system here still returns roughly £814 a year and pays for itself in 6.9 years.
Work out your own roof
4 kWp is about 10 panels
50% typical, 75% with a battery
Pays for itself in
6.9 years
£814 a year in South West, against about £5,600 installed. Over 25 years you would be roughly £14,749 ahead.
Generated per year
3,960 kWh
990 kWh per kWp here
Used at home
1,980 kWh
£517 off your bill
Exported
1,980 kWh
£297 earned