Glamorgan
Solar panels in Tonyrefail, designed on a free call.
Twelve panels (6.36 kWp) here make about 6,300 kWh a year for £6,360 installed, designed around your roof on a free 30-minute video call.
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- Free 30-minute video design call
- Priced before anyone visits
- Installed by our MCS-certified, fully insured teams
How much a Tonyrefail roof makes, month by month
PVGIS puts Tonyrefail at 991 kWh per kWp a year, 5% 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 | 32.7 |
| February | 52.2 |
| March | 87 |
| April | 117 |
| May | 126 |
| June | 123 |
| July | 122 |
| August | 107 |
| September | 91.9 |
| October | 60.7 |
| November | 41.1 |
| December | 30.8 |
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: Tonyrefail makes 991 kWh per kWp a year, and the mean of our 85 county PVGIS estimates (our GB average) is 925, so Tonyrefail is 7% above it.
How Tonyrefail compares
Small towns rarely get published solar figures, so here are the numbers for Tonyrefail. It is one of 32 Glamorgan towns we track, and it ranks joint 20th of 32 for solar yield, a town of 10,592 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 Tonyrefail'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.
Planning applications here go through Rhondda Cynon Taf; nationally, the House of Commons Library classes Tonyrefail 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 Tonyrefail's own coordinates (51.58008, -3.43077), 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 Tonyrefail
On NESO's licence-area map, Tonyrefail is in South Wales, which National Grid Electricity Distribution (NGED) operates. That makes NGED the network operator for any system fitted here.
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.
Heat pumps and EV charging in Tonyrefail
A heat pump in Tonyrefail
Heating demand peaks when solar is weakest. In Tonyrefail, a 12-panel system makes about 200 kWh in December and 210 kWh in January, a fraction of its 800 kWh in May, which is why a heat pump here is costed on its tariff first.
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 Tonyrefail
Tonyrefail's May output, about 800 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.
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).
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 Tonyrefail
If a system in Tonyrefail is underperforming, start with the guides below: repair benchmarks, service scope, and the inverter question.
Solar in Tonyrefail: your questions answered
How much energy would 12 solar panels make in Tonyrefail?
Tonyrefail averages 2.71 peak sun hours a day, which PVGIS turns into 991 kWh per kWp a year. On a 12-panel, 6.36 kWp roof that is about 6,300 kWh, 69% of it between April and September.
Is solar more expensive in Tonyrefail?
Prices on this site are the same everywhere: £1,000 per kWp installed, which puts a 12-panel system at £6,360 in Tonyrefail, and a Duracell Dura16 installed with solar at £4,450 on top. The local part is generation, about 6,300 kWh a year here, which is what drives payback.
Who is the network operator in Tonyrefail, 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 Tonyrefail?
On the 12p export scenario, a 12-panel system in Tonyrefail sends about 5,366 kWh a year to the grid, worth around £644. The export rates table compares what each supplier pays.
How does solar perform in Tonyrefail in the winter months?
December is the weakest month in Tonyrefail: about 200 kWh from 12 panels, against 800 kWh in May. The panels still generate on bright winter days; they just cover a smaller share of what the house uses.
How Tonyrefail compares with its neighbours
How the towns nearest Tonyrefail compare on the same PVGIS settings, closest first.
| Town | kWh per kWp a year | vs Tonyrefail |
|---|---|---|
| Tonyrefail | 991 | this town |
| Porth | 961 | −30 kWh |
| Tonypandy | 956 | −35 kWh |
| Llanharan and Brynna | 1,044 | +53 kWh |
| Pontypridd | 997 | +6 kWh |
| Church Village | 1,001 | +10 kWh |
| Rhondda | 882 | −109 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 Tonyrefail: Solar panels in Tonyrefail from OVO Solar & Battery
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Reading for Tonyrefail homeowners
Sourced, dated and written by us. The same ground we cover on your free call.
How many solar panels do I need? The honest way to count
One panel is 2.26 square metres. The rest is measuring your roof honestly.
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Read the guide →What are the disadvantages of a heat pump? Six honest ones
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Read the guide →Choosing a tariff when you have solar, a battery and an EV
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Read the guide →What MCS certification actually is, and why your export payments depend on it
The badge that decides whether your solar earns export payments. It cannot be added later.
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.