Monmouthshire
Solar panels in Pontllanfraith, with the numbers shown.
About 6,280 kWh a year from 12 panels in Pontllanfraith, £6,360 installed, with your system designed on a free 30-minute video call.
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- Free 30-minute video design call
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What a roof in Pontllanfraith can generate
From 31.2 kWh per kWp in December to 124.2 in May: a roof in Pontllanfraith makes 4 times as much in its best month as in its darkest, and 988 kWh per kWp across the year.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 34.6 |
| February | 52.3 |
| March | 86.2 |
| April | 113 |
| May | 124 |
| June | 122 |
| July | 123 |
| August | 107 |
| September | 92.5 |
| October | 60.9 |
| November | 41.5 |
| December | 31.2 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
For scale: 988 kWh per kWp in Pontllanfraith against 925, our GB average (the mean of our 85 county PVGIS estimates), which puts Pontllanfraith 7% above it.
How Pontllanfraith compares
Small towns rarely get published solar figures, so here are the numbers for Pontllanfraith. It is one of 16 Monmouthshire towns we track, and it ranks 9th of 16 for solar yield, a town of 9,481 people in the House of Commons Library settlement data. PVGIS gives its roofs 988 kWh per kWp a year, 2.71 peak sun hours a day averaged across the seasons, and the standard 12 panel model turns that into £889 of year one benefit, £247 of it from your own generation and £642 from export at 12p.
These are starting numbers, not a quote. The calculator below opens on Pontllanfraith's own PVGIS figure; change the panels, the battery or the export rate and it reruns. The design call replaces every assumption with your roof and your bills.
Pontllanfraith sits within Caerphilly, its local planning authority, and the House of Commons Library classes it 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.
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.
Generation is modelled from PVGIS satellite data for Pontllanfraith's own coordinates (51.6543, -3.19301), using the same 26.32p/kWh import value and £1,000 per kWp installed pricing as every Clearline estimate; the methodology is on our help page.
Connecting solar to the Pontllanfraith network
National Grid Electricity Distribution (NGED) owns and runs the local electricity network in Pontllanfraith, as part of its South Wales licence area.
What decides the paperwork is the inverter and battery output, not the number of panels. Up to 3.68kW per phase, a system follows G98: NGED is notified within 28 days of commissioning and nothing has to be approved first.
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.
Adding a heat pump or an EV charger in Pontllanfraith
A heat pump in Pontllanfraith
Solar and a heat pump pull in opposite directions through the year: Pontllanfraith's roofs make 1,020 kWh from November to February on a 12-panel system, and 3,030 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 Pontllanfraith
From April to September, 69% of a Pontllanfraith roof's yearly output arrives, peaking at about 790 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.
What the named kit costs, installed
Every system is designed around your roof on the free call before anything is fitted.
Solar panel servicing and repair in Pontllanfraith
Guidance is nationwide, so the benchmarks hold in Pontllanfraith: repair costs, service scope, and when the inverter is the real fault.
Common questions about solar in Pontllanfraith
What could a roof in Pontllanfraith generate?
PVGIS puts a roof in Pontllanfraith at 988 kWh per kWp a year, 2.71 peak sun hours a day averaged across the seasons. A 12-panel, 6.36 kWp system makes about 6,280 kWh a year, most of it between April and September.
What would 12 solar panels cost in Pontllanfraith?
£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 Pontllanfraith differs is output: about 6,280 kWh a year from that system.
Do I need permission from the DNO for solar in Pontllanfraith?
Usually not in advance. NGED, the network operator for Pontllanfraith, 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 would export pay on a system in Pontllanfraith?
It is exported. With typical use and no battery, about 5,347 kWh of the 6,280 kWh a 12-panel system makes in Pontllanfraith goes to the grid, around £642 a year at 12p. A battery keeps more of it for the evening; the export rates table shows what suppliers pay.
Do solar panels work in winter in Pontllanfraith?
Yes, at a lower level. PVGIS gives Pontllanfraith 31.2 kWh per kWp in December and 34.6 in January, so a 12-panel system makes about 200 kWh and 220 kWh in those months, against 790 kWh in May. Winter output mostly covers daytime use rather than exporting.
How Pontllanfraith compares with its neighbours
How the towns nearest Pontllanfraith compare on the same PVGIS settings, closest first.
| Town | kWh per kWp a year | vs Pontllanfraith |
|---|---|---|
| Pontllanfraith | 988 | this town |
| Blackwood | 987 | −1 kWh |
| Ystrad Mynach | 991 | +3 kWh |
| Newbridge | 999 | +11 kWh |
| Bargod | 985 | −3 kWh |
| Risca | 991 | +3 kWh |
| Caerphilly | 1,018 | +30 kWh |
Each row is a PVGIS v5.2 run at that town's centre with the same settings. Treat gaps of a few kWh as noise and gaps over about 30 kWh per kWp as real differences in sunshine.
Also for Pontllanfraith: Solar panels in Pontllanfraith 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 Pontllanfraith homeowners
Sourced, dated and written by us. The same ground we cover on your free call.
Are solar panels worth it in 2026? Here is the actual maths
Roughly £1,000 per kWp installed, offsetting electricity at 26.32p a unit. The real arithmetic.
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 →Home EV charger types and speeds, explained properly
Granny cable, 7kW wall unit or 22kW three phase. What each adds per hour, and which you need.
Read the guide →How an air source heat pump actually works
It moves heat rather than making it. The cycle, the efficiency numbers and the trade-offs.
Read the guide →What the Smart Export Guarantee actually is
The scheme obliges suppliers to pay above zero, and leaves the rate to them.
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 →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.