Monmouthshire
Solar panels in Cwmbrân, sized to your roof.
A 12-panel roof in Cwmbrân makes about 6,500 kWh a year and costs £6,360 installed; a free 30-minute video call sizes it to yours.
Get my free quote
Three details. We call or text within one working day to book your free 30-minute design call, on video or by phone if you prefer.
or call 07782 219224
- Free 30-minute video design call
- Priced before anyone visits
- Installed by our MCS-certified, fully insured teams
What a roof in Cwmbrân can generate
Cwmbrân's best month is May, at 126.7 kWh per kWp; December manages 34.7. Over the year that comes to 1,022 kWh per kWp, 2% above our Monmouthshire county estimate.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 37.2 |
| February | 54.3 |
| March | 87.9 |
| April | 115 |
| May | 127 |
| June | 126 |
| July | 126 |
| August | 110 |
| September | 95.7 |
| October | 64 |
| November | 43.5 |
| December | 34.7 |
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 1,022, Cwmbrân is 10% above it.
How Cwmbrân compares
Among the places we publish figures for, Cwmbrân is one of 16 Monmouthshire towns we track, and it ranks 4th of 16 for solar yield. It is a medium town in the House of Commons Library classification, with 48,107 residents, and its roofs see 2.80 peak sun hours a day across the year. That drives the standard 12 panel model to 6,500 kWh of generation, of which around 5,563 kWh is exported at 12p for £668 a year, with £247 saved on electricity you would otherwise buy at 26.32p.
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 Cwmbrân's own yield.
Cwmbrân sits within Torfaen, its local planning authority, and the House of Commons Library classes it as a medium 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.
Price this for your roof
Three details. We call or text within one working day to book your free 30-minute design call, on video or by phone if you prefer.
Modelled for Cwmbrân at 51.6497, -3.02757 on PVGIS data, with imports valued at 26.32p/kWh and solar at £1,000 per kWp installed. Sources and assumptions: help page.
Connecting solar to the Cwmbrân network
Cwmbrân sits in National Grid Electricity Distribution's South Wales licence area, so NGED is the network operator (DNO) any solar panels or battery here are registered with.
Below 3.68kW per phase of inverter and battery output, the G98 route applies: the installation is notified to NGED within 28 days of commissioning, with no prior approval.
Anything bigger is a G99 case and is applied for first. 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 Cwmbrân
A heat pump in Cwmbrân
Solar and a heat pump pull in opposite directions through the year: Cwmbrân's roofs make 1,080 kWh from November to February on a 12-panel system, and 3,110 kWh from May to August. The heating season leans on the grid, so off-peak rates do the heavy lifting.
The Boiler Upgrade Scheme, open in England and Wales, takes £7,500 off an air source or ground source heat pump, or £2,500 off an air-to-air unit. Homes on oil or LPG with no mains gas get £1,500 more until March 2027 (gov.uk, checked 28 September 2026).
Charging an EV in Cwmbrân
A 12-panel roof in Cwmbrân makes about 810 kWh in May. A typical home uses around 70 kWh of that in daylight (the calculator's typical-use settings), which leaves most of the month's output for an EV or for export.
The calculator above includes a 7.4kW smart charger from £1,100 installed. Renters and flat owners with off-street parking can claim 75% of a chargepoint's cost, up to £500 per socket, until 31 March 2027 (gov.uk, checked 28 September 2026).
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 Cwmbrân
Guidance is nationwide, so the benchmarks hold in Cwmbrân: repair costs, service scope, and when the inverter is the real fault.
Solar in Cwmbrân: your questions answered
What could a roof in Cwmbrân generate?
PVGIS puts a roof in Cwmbrân at 1,022 kWh per kWp a year, 2.80 peak sun hours a day averaged across the seasons. A 12-panel, 6.36 kWp system makes about 6,500 kWh a year, most of it between April and September.
How much are solar panels in Cwmbrân?
The price does not move by postcode. At £1,000 per kWp installed, 12 panels (6.36 kWp) come to £6,360 in Cwmbrân before a battery. What Cwmbrân changes is the return, about 6,500 kWh a year from that system, and your design call prices your actual roof.
Do I need permission from the DNO for solar in Cwmbrân?
Usually not in advance. NGED, the network operator for Cwmbrân, only needs a G98 notification within 28 days of commissioning for systems up to 3.68kW per phase. Bigger inverter or battery outputs need G99 approval first. NGED's guaranteed standards give 45 working days for a low voltage generation quotation, with £80 paid for each working day late. "See our DNO explainer.
How much can I earn from exporting solar in Cwmbrân?
With typical use and no battery, a 12-panel system in Cwmbrân exports about 5,563 kWh a year. At 12p per kWh that is roughly £668; a supplier paying more, or a battery that keeps more for the evening, changes the figure. See the export rates table.
Do solar panels work in winter in Cwmbrân?
Yes, at a lower level. PVGIS gives Cwmbrân 34.7 kWh per kWp in December and 37.2 in January, so a 12-panel system makes about 220 kWh and 240 kWh in those months, against 810 kWh in May. Winter output mostly covers daytime use rather than exporting.
How Cwmbrân compares with its neighbours
How the towns nearest Cwmbrân compare on the same PVGIS settings, closest first.
| Town | kWh per kWp a year | vs Cwmbrân |
|---|---|---|
| Cwmbrân | 1,022 | this town |
| Pontypool | 993 | −29 kWh |
| Rogerstone | 1,016 | −6 kWh |
| Risca | 991 | −31 kWh |
| Newport | 1,029 | +7 kWh |
| Newbridge | 999 | −23 kWh |
| Abersychan | 958 | −64 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 Cwmbrân: Solar panels in Cwmbrân from OVO Solar & Battery
See a number before you speak to anyone
Answer a few questions about your roof and usage and see an instant solar and battery estimate. No email needed to see the result.
Reading for Cwmbrân homeowners
Sourced, dated and written by us. The same ground we cover on your free call.
0% VAT on solar and batteries: what qualifies, and what does not
Zero VAT until 31 March 2027, then 5% returns. What qualifies, and what it is worth.
Read the guide →Whole home backup or partial backup? The runtime arithmetic
Whole home backup sounds obvious until you do the runtime maths. Here is how to choose the right tier.
Read the guide →The main home EV chargers, compared on what actually differs
Eight popular UK home chargers on cable, connectivity, warranty and tariff integration.
Read the guide →Do you need to replace your radiators for a heat pump?
Some change, most do not. The room by room arithmetic that decides which.
Read the guide →EV tariffs compared: the cheapest overnight windows
Overnight rates of 6.99p to 9p against a 26.32p capped average, compared.
Read the guide →MCS, HIES, RECC, NAPIT, TrustMark and Flexi-Orb: which badge does what
Six logos, six different jobs. What each scheme covers, and which are actually required.
Read the guide →Get my free quote
Takes about two minutes. We call or text within one working day to book your free 30-minute video design call at a time that suits you. We design it around your roof and your numbers, and our MCS-certified, fully insured installation teams install it.