Monmouthshire
Solar panels in Monmouth, designed on a free call.
About 6,250 kWh a year from 12 panels in Monmouth, £6,360 installed, with your system designed on a free 30-minute video call.
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or call 07782 219224
- Free 30-minute video design call
- Priced before anyone visits
- Installed by our MCS-certified, fully insured teams
How much a Monmouth roof makes, month by month
PVGIS puts Monmouth at 983 kWh per kWp a year, 2% below our Monmouthshire county estimate. 69% of it arrives between April and September, peaking in July.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 36.1 |
| February | 51.5 |
| March | 84.2 |
| April | 113 |
| May | 121 |
| June | 120 |
| July | 124 |
| August | 106 |
| September | 92.6 |
| October | 61.7 |
| November | 41.9 |
| December | 32.4 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
For scale: 983 kWh per kWp in Monmouth against 925, our GB average (the mean of our 85 county PVGIS estimates), which puts Monmouth 6% above it.
How Monmouth compares
Small towns rarely get published solar figures, so here are the numbers for Monmouth. It is one of 16 Monmouthshire towns we track, and it ranks joint 11th of 16 for solar yield, a town of 10,353 people in the House of Commons Library settlement data. PVGIS gives its roofs 983 kWh per kWp a year, 2.69 peak sun hours a day averaged across the seasons, and the standard 12 panel model turns that into £885 of year one benefit, £247 of it from your own generation and £638 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 Monmouth's own yield.
Any planning application in Monmouth sits with Monmouthshire, and its official House of Commons Library settlement class is 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 Monmouth's own coordinates (51.81318, -2.71784), 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.
The network operator for Monmouth
Monmouth 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.
Above that, G99 means applying before the work is booked. 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 Monmouth
A heat pump in Monmouth
Heating demand peaks when solar is weakest. In Monmouth, a 12-panel system makes about 210 kWh in December and 230 kWh in January, a fraction of its 790 kWh in July, which is why a heat pump here is costed on its tariff first.
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 Monmouth
Monmouth's July output, about 790 kWh from 12 panels, is several times the 70 kWh or so a typical home uses in daylight that month on our calculator's settings. Daytime charging turns that surplus into miles.
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.
Installed prices, the same in every town
Every system is designed around your roof on the free call before anything is fitted.
Solar panel servicing and repair in Monmouth
If a system in Monmouth is underperforming, start with the guides below: repair benchmarks, service scope, and the inverter question.
Common questions about solar in Monmouth
How much energy would 12 solar panels make in Monmouth?
Monmouth averages 2.69 peak sun hours a day, which PVGIS turns into 983 kWh per kWp a year. On a 12-panel, 6.36 kWp roof that is about 6,250 kWh, 69% of it between April and September.
Is solar more expensive in Monmouth?
Prices on this site are the same everywhere: £1,000 per kWp installed, which puts a 12-panel system at £6,360 in Monmouth, and a Duracell Dura16 installed with solar at £4,450 on top. The local part is generation, about 6,250 kWh a year here, which is what drives payback.
Who is the network operator in Monmouth, and do I need a G99 application?
The operator is National Grid Electricity Distribution (NGED). Most home systems use the G98 route, a notification within 28 days of switch-on for up to 3.68kW per phase, so nothing waits on the network. Above that, G99 applies and has to be granted first. NGED's guaranteed standards give 45 working days for a low voltage generation quotation, with £80 paid for each working day late. Your design call checks which route yours needs.
What could I earn from exporting in Monmouth?
On the 12p export scenario, a 12-panel system in Monmouth sends about 5,315 kWh a year to the grid, worth around £638. The export rates table compares what each supplier pays.
How does solar perform in Monmouth in the winter months?
December is the weakest month in Monmouth: about 210 kWh from 12 panels, against 790 kWh in July. The panels still generate on bright winter days; they just cover a smaller share of what the house uses.
How Monmouth compares with its neighbours
Same satellite dataset, same assumptions, so the differences are real geography rather than modelling noise.
| Town | kWh per kWp a year | vs Monmouth |
|---|---|---|
| Monmouth | 983 | this town |
| Ross-on-Wye | 981 | −2 kWh |
| Cinderford | 997 | +14 kWh |
| Lydney | 1,024 | +41 kWh |
| Chepstow | 1,032 | +49 kWh |
| Abergavenny | 983 | level |
| Caldicot | 1,023 | +40 kWh |
Same PVGIS v5.2 query for every town. Small differences are within year-to-year weather; more than about 30 kWh per kWp apart is geography.
Also for Monmouth: Solar panels in Monmouth from OVO Solar & Battery
Also near Monmouth
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.
Further reading for Monmouth
Sourced, dated and written by us. The same ground we cover on your free call.
Do solar panels need direct sunlight? Not really, and here is why
No. Solar cells respond to light hitting them, not to a clear line of sight to the sun.
Read the guide →Inside a home battery: capacity, power and losses
Usable capacity, kW output, round trip losses and chemistry, in plain terms.
Read the guide →How solar aware EV charging actually works
The CT clamp, the surplus tracking and the 1.4kW floor that catches people out.
Read the guide →Are heat pumps worth it? The real 2026 numbers
Electricity costs 3.3x gas per kWh. A heat pump is about 3x as efficient. The numbers nearly cancel out.
Read the guide →Why tariff choice moves payback more than kit choice
Identical kit, five times the export income. The tariff decision worked through with August 2026 rates.
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.