Indicative 4 kWp install in Exeter: £6,750–£7,900. Region: UK average (×0.98). Annual irradiance: ~1010 kWh/kWp.
What Exeter homeowners actually pay
Exeter combines strong south-west irradiance with relatively straightforward housing in its outer suburbs, making it one of the better English cities for solar payback. A typical 4 kWp install lands £5,400–£7,000 and produces around 3,860 kWh per year. The catch is central Exeter — much of EX1 and EX4 sits inside conservation areas around the Cathedral Close, where front-elevation panels usually need planning consent. Suburban EX2 and EX4 (Pinhoe, Whipton, Pennsylvania) install much faster.
Local notes for Exeter
Strong south-west irradiance ~965 kWh/kWp/yr — comfortably above the UK average.
Large central conservation area (Cathedral Close, St Leonard's) restricts front-elevation panels.
Heavily Victorian and Edwardian housing in St Leonard's and Newtown — many slate roofs.
DNO is NGED — G99 sign-off typically 4–6 weeks in Exeter postcodes.
Field notes
Generation ~3,860 kWh/yr from a typical 4 kWp south-facing array.
Slate roofs common in EX4 — adds ~half a day of labour vs tile.
DNO is NGED — typical G99 sign-off in 4–6 weeks.
Frequently asked questions
Can I install solar on a St Leonard's Victorian?
Yes on rear elevations as permitted development. Front-roof installs in the St Leonard's conservation area need a planning application to Exeter City Council and typically take 8 weeks. All-black panels are usually a condition of approval.
What system size suits a typical Exeter home?
3–4 kWp on most Heavitree or St Leonard's terraces. Suburban semis in Pinhoe, Whipton and Topsham often fit 4–6 kWp with battery.