Glamorgan
Solar panels in Ystrad Mynach, with the numbers shown.
A 12-panel roof in Ystrad Mynach makes about 6,300 kWh a year and costs £6,360 installed; a free 30-minute video call sizes it to yours.
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What a roof in Ystrad Mynach can generate
From 33.4 kWh per kWp in December to 124.1 in May: a roof in Ystrad Mynach makes 3.7 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 | 35.5 |
| February | 52.5 |
| March | 87.4 |
| April | 114 |
| May | 124 |
| June | 121 |
| July | 122 |
| August | 106 |
| September | 91.9 |
| October | 61 |
| November | 42.4 |
| December | 33.4 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
For scale: 991 kWh per kWp in Ystrad Mynach against 925, our GB average (the mean of our 85 county PVGIS estimates), which puts Ystrad Mynach 7% above it.
How Ystrad Mynach compares
Small towns rarely get published solar figures, so here are the numbers for Ystrad Mynach. It is one of 32 Glamorgan towns we track, and it ranks joint 20th of 32 for solar yield, a town of 12,322 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.
These are starting numbers, not a quote. The calculator below opens on Ystrad Mynach'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.
Ystrad Mynach 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.
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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.
The figures use PVGIS for the centre of Ystrad Mynach (51.64466, -3.23679), a 26.32p/kWh import price and £1,000 per kWp installed; see the help page for the full method.
Connecting solar to the Ystrad Mynach network
Ystrad Mynach is served by National Grid Electricity Distribution (NGED): the town's centre falls inside its South Wales licence area on NESO's boundary map.
Most home systems stay within 3.68kW per phase of inverter output, which puts them on G98, a notification to NGED within 28 days of switch-on. Panel count does not decide it; the inverter and any battery do.
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 Ystrad Mynach
A heat pump in Ystrad Mynach
Solar and a heat pump pull in opposite directions through the year: Ystrad Mynach's roofs make 1,040 kWh from November to February on a 12-panel system, and 3,010 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 Ystrad Mynach
From April to September, 68% of a Ystrad Mynach 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.
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.
The packages, priced before anyone visits
Every system is designed around your roof on the free call before anything is fitted.
Solar panel servicing and repair in Ystrad Mynach
Guidance is nationwide, so the benchmarks hold in Ystrad Mynach: repair costs, service scope, and when the inverter is the real fault.
Ystrad Mynach solar questions
What could a roof in Ystrad Mynach generate?
PVGIS puts a roof in Ystrad Mynach 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.
What would 12 solar panels cost in Ystrad Mynach?
£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 Ystrad Mynach differs is output: about 6,300 kWh a year from that system.
Do I need permission from the DNO for solar in Ystrad Mynach?
Usually not in advance. NGED, the network operator for Ystrad Mynach, 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 Ystrad Mynach?
It is exported. With typical use and no battery, about 5,366 kWh of the 6,300 kWh a 12-panel system makes in Ystrad Mynach goes to the grid, around £644 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 Ystrad Mynach?
Yes, at a lower level. PVGIS gives Ystrad Mynach 33.4 kWh per kWp in December and 35.5 in January, so a 12-panel system makes about 210 kWh and 230 kWh in those months, against 790 kWh in May. Winter output mostly covers daytime use rather than exporting.
How Ystrad Mynach compares with its neighbours
The six closest towns we publish, run through the identical PVGIS query as Ystrad Mynach.
| Town | kWh per kWp a year | vs Ystrad Mynach |
|---|---|---|
| Ystrad Mynach | 991 | this town |
| Pontllanfraith | 988 | −3 kWh |
| Blackwood | 987 | −4 kWh |
| Bargod | 985 | −6 kWh |
| Newbridge | 999 | +8 kWh |
| Caerphilly | 1,018 | +27 kWh |
| Pontypridd | 997 | +6 kWh |
PVGIS v5.2 for each town centroid, identical assumptions throughout. A few kWh either way is weather-year noise; a spread beyond about 30 kWh per kWp is real geography.
Also for Ystrad Mynach: Solar panels in Ystrad Mynach from OVO Solar & Battery
Also near Ystrad Mynach
See a number before you speak to anyone
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Guides worth reading before your call
Sourced, dated and written by us. The same ground we cover on your free call.
DNO application timescales, network by network: from a G98 notification to a G99 approval
Fit and notify within 28 days, or wait ten working days to 45 for a yes. System size decides which.
Read the guide →Tesla Powerwall 3 vs Duracell Dura16: which fits your home?
The two packages we actually price, compared on the numbers that decide it.
Read the guide →Smart charge point regulations, explained
Why your charger arrives pre-set to charge overnight, and why it waits before it starts.
Read the guide →How much does a heat pump cost? The 2026 numbers, before and after the grant
UK median installed cost around £12,908, before the up to £7,500 grant comes off.
Read the guide →EV tariffs compared: the cheapest overnight windows
Overnight rates of 6.99p to 9p against a 26.32p capped average, compared.
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.