Indicative 4 kWp install in Newport: £6,700–£7,850. Region: North / Wales (×0.96). Annual irradiance: ~940 kWh/kWp.
What Newport homeowners actually pay
Newport sits in the same south Wales irradiance band as Cardiff (~935 kWh/kWp/yr) and shares its installer market, which keeps prices competitive. A typical 4 kWp install lands £4,800–£6,200 and produces around 3,740 kWh per year. The trickier postcodes are central NP19 and NP20, where dense Victorian terraces mean rear-only installs and conservation cover around Stow Hill and Maindee adds planning steps for any visible work.
Local notes for Newport
South Wales irradiance ~935 kWh/kWp/yr — comparable to Cardiff and Bristol.
Victorian terraces dominate central Newport (NP19, NP20) — rear-elevation installs are the norm.
Modern estates in Bettws, Rogerstone and Duffryn install fast on standard concrete tiles.
DNO is National Grid Electricity Distribution — G99 sign-off typically 4–6 weeks.
Field notes
Generation ~3,740 kWh/yr from a typical 4 kWp south-facing array.
Shared installer market with Cardiff and Bristol keeps prices keen.
DNO is National Grid Electricity Distribution — G99 typically 4–6 weeks.
Frequently asked questions
Are central Newport terraces harder to install on?
Mostly because of access and roof orientation, not heritage. Many NP19/NP20 terraces have narrow rear access and east–west orientations, so a survey will confirm what kWp actually fits. Conservation areas around Stow Hill add planning steps for front-elevation panels.
What size system fits a typical Newport semi?
4–5 kWp on most Bettws, Rogerstone, Duffryn and Caerleon semis. Larger detached homes often fit 5–6 kWp with battery.