Solar panels in Portsmouth

Excellent yields. Coastal salt air is worth mentioning to installers for mounting choices.

Yield in Portsmouth

1020

kWh per kWp a year

A 4 kWp system

4,080

kWh generated

Worth per year

£839

saved plus exported

Payback

6.7

years, south-facing

Portsmouth sits in the South Coast solar region, at roughly 97% of what the same panels would produce in Cornwall and Devon. Brighton to Bournemouth — very close to the best yields in Britain.

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

6.7 years

£839 a year in South Coast, against about £5,600 installed. Over 25 years you would be roughly £15,366 ahead.

Generated per year

4,080 kWh

1020 kWh per kWp here

Used at home

2,040 kWh

£533 off your bill

Exported

2,040 kWh

£306 earned

Solar in other cities

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

Or see the South Coast regional page.