Glamorgan
Solar panels in Rhondda, sized to your roof.
A 12-panel roof in Rhondda makes about 5,610 kWh a year and costs £6,360 installed; a free 30-minute video call sizes it to yours.
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Rhondda's solar year
Rhondda's best month is May, at 122.6 kWh per kWp; December manages 7.4. Over the year that comes to 882 kWh per kWp, 6% below our Glamorgan county estimate.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 9.9 |
| February | 41.5 |
| March | 85.2 |
| April | 114 |
| May | 123 |
| June | 118 |
| July | 118 |
| August | 103 |
| September | 89.7 |
| October | 55.6 |
| November | 17.8 |
| December | 7.4 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
For scale: 882 kWh per kWp in Rhondda against 925, our GB average (the mean of our 85 county PVGIS estimates), which puts Rhondda 5% below it.
How Rhondda compares
Small towns rarely get published solar figures, so here are the numbers for Rhondda. It is one of 32 Glamorgan towns we track, and it ranks 32nd of 32 for solar yield, a town of 13,398 people in the House of Commons Library settlement data. PVGIS gives its roofs 882 kWh per kWp a year, 2.42 peak sun hours a day averaged across the seasons, and the standard 12 panel model turns that into £808 of year one benefit, £247 of it from your own generation and £561 from export at 12p.
Treat these as calibration rather than a quote. The calculator below runs the same model, opened on Rhondda'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.
Rhondda Cynon Taf is the planning authority covering Rhondda, which the House of Commons Library classes 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 Rhondda at 51.6434, -3.4731 on PVGIS data, with imports valued at 26.32p/kWh and solar at £1,000 per kWp installed. Sources and assumptions: help page.
Who runs the grid in Rhondda
Rhondda 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.
G98 is the simple route. If the inverter, plus any battery, stays at or under 3.68kW per phase, NGED only has to be told within 28 days after the system is commissioned.
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 Rhondda
A heat pump in Rhondda
A heat pump does most of its work from November to February. Over those four months, 12 panels in Rhondda make about 490 kWh, against 2,930 kWh from May to August, so winter heating runs mostly on grid electricity and the tariff matters more than the roof.
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 Rhondda
A 12-panel roof in Rhondda makes about 780 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 Rhondda
Faults, servicing and ageing inverters follow the same economics in Rhondda as anywhere else, and the guides below price them plainly.
Solar in Rhondda: your questions answered
What does a solar panel system produce in Rhondda?
Each kWp of panels in Rhondda makes 882 kWh a year on PVGIS figures, so a typical 12-panel system produces around 5,610 kWh, from about 50 kWh in December up to 780 kWh in May.
How much are solar panels in Rhondda?
The price does not move by postcode. At £1,000 per kWp installed, 12 panels (6.36 kWp) come to £6,360 in Rhondda before a battery. What Rhondda changes is the return, about 5,610 kWh a year from that system, and your design call prices your actual roof.
Would a system in Rhondda need approval from the network operator?
Rhondda is on National Grid Electricity Distribution's network (South Wales licence area). Systems up to 3.68kW per phase of inverter output follow G98: NGED is notified within 28 days of commissioning, with no approval needed first. Anything larger needs a G99 application before installation. NGED's guaranteed standards give 45 working days for a low voltage generation quotation, with £80 paid for each working day late. Our G98 vs G99 guide explains both routes.
How much can I earn from exporting solar in Rhondda?
With typical use and no battery, a 12-panel system in Rhondda exports about 4,673 kWh a year. At 12p per kWh that is roughly £561; a supplier paying more, or a battery that keeps more for the evening, changes the figure. See the export rates table.
Is solar worth it in Rhondda in winter?
It works, but the year is lopsided. 75% of a Rhondda roof's output lands between April and September; the four months from November to February give about 490 kWh on a 12-panel system. Payback is worked out on the whole year, not the winter.
How Rhondda 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 Rhondda |
|---|---|---|
| Rhondda | 882 | this town |
| Treorchy | 925 | +43 kWh |
| Tonypandy | 956 | +74 kWh |
| Porth | 961 | +79 kWh |
| Tonyrefail | 991 | +109 kWh |
| Mountain Ash | 948 | +66 kWh |
| Aberdare | 940 | +58 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 Rhondda: Solar panels in Rhondda from OVO Solar & Battery
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Further reading for Rhondda
Sourced, dated and written by us. The same ground we cover on your free call.
The 0% VAT deadline: what ends on 31 March 2027, and what it costs to miss it
The install deadline is still 31 March 2027. Electricity's 0% VAT was extended to the end of June.
Read the guide →Adding a battery to solar panels you already own
Retrofitting a battery to working solar is straightforward. The paperwork is where people trip up.
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 →Are air source heat pumps any good? What owners actually report
The UK's largest survey found 80% of heat pump owners satisfied, against 70% for gas boilers.
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.