Solar panels in Cardiff

Around the UK average, with south Wales doing noticeably better than the north.

Yield in Cardiff

900

kWh per kWp a year

A 4 kWp system

3,600

kWh generated

Worth per year

£740

saved plus exported

Payback

7.6

years, south-facing

Cardiff sits in the Wales solar region, at roughly 86% of what the same panels would produce in Cornwall and Devon. Around the UK average, with the south coast doing better than the north.

Work out your own roof

System size (kWp)

4 kWp is about 10 panels

Roof faces

Your electricity use (kWh/year)

Used at home (%)

50% typical, 75% with a battery

Pays for itself in

7.6 years

£740 a year in Wales, against about £5,600 installed. Over 25 years you would be roughly £12,900 ahead.

Generated per year

3,600 kWh

900 kWh per kWp here

Used at home

1,800 kWh

£470 off your bill

Exported

1,800 kWh

£270 earned

Solar in other cities

London Manchester Birmingham Leeds Glasgow Edinburgh Bristol Liverpool Sheffield Newcastle Nottingham Leicester Southampton Portsmouth Brighton Plymouth

Or see the Wales regional page.