Monmouthshire
Solar panels in Risca, sized to your roof.
About 6,300 kWh a year from 12 panels in Risca, £6,360 installed, with your system designed on a free 30-minute video call.
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 Risca can generate
From 29.1 kWh per kWp in December to 125.7 in May: a roof in Risca makes 4.3 times as much in its best month as in its darkest, and 991 kWh per kWp across the year.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 33.1 |
| February | 51.8 |
| March | 85.4 |
| April | 114 |
| May | 126 |
| June | 124 |
| July | 125 |
| August | 108 |
| September | 93.2 |
| October | 60.9 |
| November | 40.4 |
| December | 29.1 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
Against Great Britain as a whole: Risca makes 991 kWh per kWp a year, and the mean of our 85 county PVGIS estimates (our GB average) is 925, so Risca is 7% above it.
How Risca compares
Small towns rarely get published solar figures, so here are the numbers for Risca. It is one of 16 Monmouthshire towns we track, and it ranks 8th of 16 for solar yield, a town of 15,128 people in the House of Commons Library settlement data. PVGIS gives its roofs 991 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 £891 of year one benefit, £247 of it from your own generation and £644 from export at 12p.
Treat these as calibration rather than a quote. The calculator below runs the same model, opened on Risca's own yield, and 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.
Risca 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.
Modelled for Risca at 51.61105, -3.10247 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 Risca network
Risca is served by National Grid Electricity Distribution (NGED): the town's centre falls inside its South Wales licence area on NESO's boundary map.
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.
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.
Heat pumps and EV charging in Risca
A heat pump in Risca
Solar and a heat pump pull in opposite directions through the year: Risca's roofs make 980 kWh from November to February on a 12-panel system, and 3,070 kWh from May to August. The heating season leans on the grid, so off-peak rates do the heavy lifting.
Grant support in Wales comes from the Boiler Upgrade Scheme: £7,500 for an air source or ground source heat pump, £2,500 for air-to-air, and an extra £1,500 until March 2027 where the home is heated by oil or LPG off the gas grid (gov.uk, checked 28 September 2026).
Charging an EV in Risca
A 12-panel roof in Risca makes about 800 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.
If you rent, or own a flat, and have private off-street parking, the government chargepoint grant covers 75% of the cost, capped at £500 a socket, until 31 March 2027 (gov.uk, checked 28 September 2026). The calculator above prices 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 Risca
Guidance is nationwide, so the benchmarks hold in Risca: repair costs, service scope, and when the inverter is the real fault.
Solar in Risca: your questions answered
What could a roof in Risca generate?
PVGIS puts a roof in Risca at 991 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 6,300 kWh a year, most of it between April and September.
How much are solar panels in Risca?
The price does not move by postcode. At £1,000 per kWp installed, 12 panels (6.36 kWp) come to £6,360 in Risca before a battery. What Risca changes is the return, about 6,300 kWh a year from that system, and your design call prices your actual roof.
Do I need permission from the DNO for solar in Risca?
Usually not in advance. NGED, the network operator for Risca, 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 Risca?
With typical use and no battery, a 12-panel system in Risca exports about 5,366 kWh a year. At 12p per kWh that is roughly £644; 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 Risca?
Yes, at a lower level. PVGIS gives Risca 29.1 kWh per kWp in December and 33.1 in January, so a 12-panel system makes about 190 kWh and 210 kWh in those months, against 800 kWh in May. Winter output mostly covers daytime use rather than exporting.
How Risca 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 Risca |
|---|---|---|
| Risca | 991 | this town |
| Rogerstone | 1,016 | +25 kWh |
| Cwmbrân | 1,022 | +31 kWh |
| Newbridge | 999 | +8 kWh |
| Pontllanfraith | 988 | −3 kWh |
| Newport | 1,029 | +38 kWh |
| Caerphilly | 1,018 | +27 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 Risca: Solar panels in Risca 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.
Further reading for Risca
Sourced, dated and written by us. The same ground we cover on your free call.
East, west or south facing: what your roof direction really costs you
An east west split gives up about a fifth of the annual total, and can still be worth more than south.
Read the guide →Which battery size band does your home fall into?
Where UK homes actually land, why oversizing costs you, and what shifts the band.
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 →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 →Which tariffs are actually built for battery charging
A battery buys cheap and uses dear. The tariff decides how much that is worth.
Read the guide →G98 or G99: which one applies, what the application involves, and how long it takes
The G98 line sits at 3.68kW per phase. Above it, your network operator has to say yes first.
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.