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GlamorganSolar panels in Cardiff,
priced honestly.
Independent guidance on solar and battery storage for Cardiff homes in Glamorgan: a free remote design call first, then an MCS-certified installation team for your area if you decide to go ahead. PVGIS puts a roof in Cardiff at 1,024 kWh per kWp a year, 9% above our Glamorgan county estimate.
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Free, no obligation. Takes about two minutes, and nobody visits your home.
What a roof in Cardiff can generate
Real satellite data for Cardiff, real installed pricing, and the same honest model we run for every place we cover.
How Cardiff compares
Cardiff is one of 32 Glamorgan towns we track, and it ranks 14th of 32 for solar yield. The House of Commons Library settlement classification puts it in the core city class, with a population of 367,426, which makes it one of the largest places we publish figures for. Scale changes nothing about the physics: PVGIS gives a roof here 1,024 kWh per kWp a year, 2.80 peak sun hours a day averaged across the seasons, and on the 12p scenario about £247 of the year one benefit comes from solar you use yourself, with export income adding £669.
Treat these as calibration rather than a quote. The calculator below runs the same model, defaulted to Cardiff's own yield, and at Cardiff's 1,024 kWh per kWp it prices a 12 panel system at £6,360 installed before any battery. Your free design call reworks every number for your actual roof, its shading and your usage.
Any planning application in Cardiff sits with Cardiff, and its official House of Commons Library settlement class is core city.
The charger is in the installed price but left out of payback: charging savings depend on your mileage and tariff, which the design call models properly.
Price this properly, free →Your real roof, your real usage, on a free video call. No obligation.
A 12 panel, 6.36 kWp system in Cardiff generates around 6,513 kWh a year, worth around £916 in year one on the 12p export scenario.
Generation is modelled from PVGIS satellite data for Cardiff's own coordinates (51.50191, -3.184), using the same 26.32p/kWh import value and £1,000 per kWp installed pricing as every Clearline estimate, with the full methodology, sourcing and assumptions set out on our help page.
Local detail for Cardiff
Census 2021 data published by the Welsh Government shows Cardiff has the lowest rate of home ownership of any Welsh local authority, at 58.3% against a 66.4% Welsh average, and the highest rate of private renting, at 24.3%, alongside a comparatively high share of one and two-room households. That tenure pattern matters for solar as much as roof shape does: in a city where nearly a quarter of homes are privately rented, the panel decision often sits with a landlord rather than the person paying the electricity bill.
Cardiff sits in National Grid Electricity Distribution territory, on its South Wales licence. National Grid Electricity Distribution's own published Guaranteed Standard is 45 working days for a low voltage generation quotation, with a complete application acknowledged within 10 working days; most single home systems use the quicker 28-day G98 route instead. Cardiff Council is the planning authority for household solar under the same Welsh Government permitted development rules that apply across Wales.
The council's One Planet Cardiff strategy targets carbon neutrality for the city, covering both its own operations and the wider city, by 2030. Cardiff Council has also unanimously approved a 1,000MW battery storage scheme on a former steelworks and sewage treatment site in Tremorfa, Splott, comprising 828 containerised units and reported as the largest battery storage scheme to secure planning permission in the UK so far.
Network operator (DNO): National Grid Electricity Distribution · G99 application
Planning authority: Cardiff Council
mcscertified.com · oneplanetcardiff.co.uk · cardiffcapitalregion.wales
Solar panel servicing and repair in Cardiff
If a system in Cardiff is underperforming, start with the guides below: repair benchmarks, service scope, and the inverter question.
Common questions about solar in Cardiff
What could a roof in Cardiff generate?
PVGIS puts a roof in Cardiff at 1,024 kWh per kWp a year, 2.80 peak sun hours a day averaged across the seasons.
What does a typical solar system cost in Cardiff?
A typical 12 panel, 6.36 kWp system in Cardiff costs around £6,360 installed, at £1,000 per kWp before any battery.
Would a system in Cardiff need a G99 application?
Most home solar and battery systems qualify for the simpler G98 notification, made to the network operator (DNO) after installation rather than before. A minority, usually larger systems, need the fuller G99 process instead. Your design call checks which applies in Cardiff before anything is booked; our G98 vs G99 guide explains the difference in full.
What could I earn from exporting in Cardiff?
On the 12p export scenario, that 12 panel system sends about 5,576 kWh a year to the grid, worth around £669. The tariff guide compares the export rates that could apply to your setup.
Get your free quote
Takes about two minutes. We work out your options, then confirm your free remote design call, on video, at a time that suits you. It starts with your roof and your numbers, and the design is built around them rather than around a product someone needs to shift.
Reading for Cardiff homeowners
Independent, sourced and dated. The same ground we cover on your free call.
What solar actually costs in 2026, and where every pound goes
Around £8,677 average, £1,550 to £1,800 per kW. Where every pound actually goes.
Read the guide →What a battery gateway actually does
Without a gateway your system shuts down when the grid does. Here is what the box actually does.
Read the guide →Charging an EV from your own solar
Every surplus kWh is 3.6 to 5 miles. Whether that beats a 7p overnight rate is arithmetic.
Read the guide →What MCS certification actually buys you on a heat pump job
The gate on the £7,500 grant, the design standard behind your running costs, and the noise sign-off.
Read the guide →Why the best export rates always carry conditions
The top export rates are acquisition offers. Here is how to price the condition.
Read the guide →HIES explained: what the badge actually protects, and when
What HIES protects: deposits up to 25 percent capped at 5,000 pounds, and your workmanship guarantee.
Read the guide →How Cardiff compares with its neighbours
Same satellite dataset, same assumptions, so the differences are real geography rather than modelling noise.
| Town | kWh per kWp | Peak sun hours | vs Cardiff |
|---|---|---|---|
| Cardiff | 1,024 | 2.80 | — |
| Penarth | 1,055 | 2.89 | +31 kWh |
| Dinas Powis | 1,058 | 2.90 | +34 kWh |
| Caerphilly | 1,018 | 2.79 | -6 kWh |
| Barry (Vale of Glamorgan) | 1,060 | 2.90 | +36 kWh |
| Church Village | 1,001 | 2.74 | -23 kWh |
| Rogerstone | 1,016 | 2.78 | -8 kWh |
PVGIS v5.2 for each town centroid, identical assumptions throughout. A few kWh either way is weather-year noise; a spread beyond about 30 kWh per kWp is real geography.
Also for Cardiff: Solar panels in Cardiff from OVO Solar & Battery