Glamorgan
Solar panels in Dinas Powis, with the numbers shown.
Twelve panels (6.36 kWp) here make about 6,730 kWh a year for £6,360 installed, designed around your roof on a free 30-minute video call.
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Dinas Powis' solar year
PVGIS puts Dinas Powis at 1,058 kWh per kWp a year, 13% above our Glamorgan county estimate. 69% of it arrives between April and September, peaking in May.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 36.9 |
| February | 56.3 |
| March | 92.1 |
| April | 122 |
| May | 135 |
| June | 132 |
| July | 132 |
| August | 114 |
| September | 98.6 |
| October | 63.8 |
| November | 42.3 |
| December | 33.8 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
Our GB average is 925 kWh per kWp a year, the mean of the 85 county PVGIS estimates we publish; at 1,058, Dinas Powis is 14% above it.
How Dinas Powis compares
Small towns rarely get published solar figures, so here are the numbers for Dinas Powis. It is one of 32 Glamorgan towns we track, and it ranks joint 5th of 32 for solar yield, a town of 8,095 people in the House of Commons Library settlement data. PVGIS gives its roofs 1,058 kWh per kWp a year, 2.90 peak sun hours a day averaged across the seasons, and the standard 12 panel model turns that into £942 of year one benefit, £247 of it from your own generation and £695 from export at 12p.
Every figure here assumes a clear, south-facing roof at 35 degrees. Yours will differ, which is what the free design call is for; until then, the calculator below tests panels, batteries and export rates on Dinas Powis' own yield.
Vale of Glamorgan is the planning authority covering Dinas Powis, which the House of Commons Library classes as a small town.
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.
Your real roof and usage, worked through on a free 30-minute video call. Use the full form or leave three details below.
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The figures use PVGIS for the centre of Dinas Powis (51.43364, -3.21534), a 26.32p/kWh import price and £1,000 per kWp installed; see the help page for the full method.
Who runs the grid in Dinas Powis
National Grid Electricity Distribution (NGED) owns and runs the local electricity network in Dinas Powis, as part of its South Wales licence area.
For a typical home the paperwork is light: a system of up to 3.68kW per phase goes through G98, which means NGED is notified within 28 days of switch-on rather than asked beforehand.
A bigger inverter or battery output needs a G99 application in advance. NGED's guaranteed standards give 45 working days for a low voltage generation quotation, with £80 paid for each working day late.
Sources: NESO DNO licence areas (3 May 2024); NGED, guaranteed standards of performance table, checked 25 September 2026. G98 vs G99, explained.
Beyond the panels: heating and car charging in Dinas Powis
A heat pump in Dinas Powis
A heat pump does most of its work from November to February. Over those four months, 12 panels in Dinas Powis make about 1,080 kWh, against 3,260 kWh from May to August, so winter heating runs mostly on grid electricity and the tariff matters more than the roof.
In Wales, the Boiler Upgrade Scheme pays £7,500 towards an air source or ground source heat pump and £2,500 towards an air-to-air one, with £1,500 more until March 2027 for homes heated by oil or LPG with no mains gas (gov.uk, checked 28 September 2026).
Charging an EV in Dinas Powis
From April to September, 69% of a Dinas Powis roof's yearly output arrives, peaking at about 860 kWh in May on 12 panels. A car parked at home in daylight can soak up what the house, at around 70 kWh of daytime use that month, cannot.
Renters and flat owners with private off-street parking can get 75% off a chargepoint and its installation, up to £500 per socket, until 31 March 2027 (gov.uk, checked 28 September 2026). The calculator above adds a 7.4kW smart charger from £1,100 installed.
The packages, priced before anyone visits
Every system is designed around your roof on the free call before anything is fitted.
Solar panel servicing and repair in Dinas Powis
Faults, servicing and ageing inverters follow the same economics in Dinas Powis as anywhere else, and the guides below price them plainly.
Solar in Dinas Powis: your questions answered
What does a solar panel system produce in Dinas Powis?
Each kWp of panels in Dinas Powis makes 1,058 kWh a year on PVGIS figures, so a typical 12-panel system produces around 6,730 kWh, from about 210 kWh in December up to 860 kWh in May.
What would 12 solar panels cost in Dinas Powis?
£6,360 for 12 panels (6.36 kWp), the same as in every other place we cover, because solar is priced at £1,000 per kWp installed rather than by area. A battery adds its own installed price on top. Where Dinas Powis differs is output: about 6,730 kWh a year from that system.
Would a system in Dinas Powis need approval from the network operator?
Dinas Powis is on National Grid Electricity Distribution's network (South Wales licence area). Systems up to 3.68kW per phase of inverter output follow G98: NGED is notified within 28 days of commissioning, with no approval needed first. Anything larger needs a G99 application before installation. NGED's guaranteed standards give 45 working days for a low voltage generation quotation, with £80 paid for each working day late. Our G98 vs G99 guide explains both routes.
How much would export pay on a system in Dinas Powis?
It is exported. With typical use and no battery, about 5,792 kWh of the 6,730 kWh a 12-panel system makes in Dinas Powis goes to the grid, around £695 a year at 12p. A battery keeps more of it for the evening; the export rates table shows what suppliers pay.
Is solar worth it in Dinas Powis in winter?
It works, but the year is lopsided. 69% of a Dinas Powis roof's output lands between April and September; the four months from November to February give about 1,080 kWh on a 12-panel system. Payback is worked out on the whole year, not the winter.
How Dinas Powis compares with its neighbours
The six closest towns we publish, run through the identical PVGIS query as Dinas Powis.
| Town | kWh per kWp a year | vs Dinas Powis |
|---|---|---|
| Dinas Powis | 1,058 | this town |
| Penarth | 1,055 | −3 kWh |
| Barry | 1,060 | +2 kWh |
| Cardiff | 1,024 | −34 kWh |
| Church Village | 1,001 | −57 kWh |
| Caerphilly | 1,018 | −40 kWh |
| Pontypridd | 997 | −61 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 Dinas Powis: Solar panels in Dinas Powis from OVO Solar & Battery
Also near Dinas Powis
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Guides worth reading before your call
Sourced, dated and written by us. The same ground we cover on your free call.
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Read the guide →EV tariffs compared: the cheapest overnight windows
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Read the guide →NAPIT, NICEIC and competent person schemes: who tells building control about your solar
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Read the guide →Get my free quote
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