Home › Coverage › Glamorgan › Mountain Ash
GlamorganSolar panels in Mountain Ash,
priced honestly.
Independent guidance on solar and battery storage for Mountain Ash homes in Glamorgan: a free remote design call first, then an MCS-certified installation team for your area if you decide to go ahead. PVGIS puts a roof in Mountain Ash at 948 kWh per kWp a year, 1% above our Glamorgan county estimate.
Start with your postcode
Free, no obligation. Takes about two minutes, and nobody visits your home.
What a roof in Mountain Ash can generate
Real satellite data for Mountain Ash, real installed pricing, and the same honest model we run for every place we cover.
How Mountain Ash compares
Small towns rarely get published solar figures, so here are the numbers for Mountain Ash. It is one of 32 Glamorgan towns we track, and it ranks 27th of 32 for solar yield, a town of 13,405 people in the House of Commons Library settlement data. PVGIS gives its roofs 948 kWh per kWp a year, 2.60 peak sun hours a day averaged across the seasons, and the standard 12 panel model turns that into £858 of year one benefit, £247 of it from your own generation and £611 from export at 12p.
Treat these as calibration rather than a quote. The calculator below runs the same model, defaulted to Mountain Ash's own yield, and at Mountain Ash's 948 kWh per kWp it 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.
Mountain Ash sits within Rhondda Cynon Taf, 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.
Price this properly, free →Your real roof, your real usage, on a free video call. No obligation.
A 12 panel, 6.36 kWp system in Mountain Ash generates around 6,029 kWh a year, worth around £858 in year one on the 12p export scenario.
Generation is modelled from PVGIS satellite data for Mountain Ash's own coordinates (51.67952, -3.3782), using the same 26.32p/kWh import value and £1,000 per kWp installed pricing as every Clearline estimate, with the full methodology, sourcing and assumptions set out on our help page.
Solar panel servicing and repair in Mountain Ash
Guidance is nationwide, so the benchmarks hold in Mountain Ash: repair costs, service scope, and when the inverter is the real fault.
Common questions about solar in Mountain Ash
What could a roof in Mountain Ash generate?
PVGIS puts a roof in Mountain Ash at 948 kWh per kWp a year, 2.60 peak sun hours a day averaged across the seasons.
What does a typical solar system cost in Mountain Ash?
A typical 12 panel, 6.36 kWp system in Mountain Ash costs around £6,360 installed, at £1,000 per kWp before any battery.
Would a system in Mountain Ash need a G99 application?
Most home solar and battery systems qualify for the simpler G98 notification, made to the network operator (DNO) after installation rather than before. A minority, usually larger systems, need the fuller G99 process instead. Your design call checks which applies in Mountain Ash before anything is booked; our G98 vs G99 guide explains the difference in full.
What could I earn from exporting in Mountain Ash?
On the 12p export scenario, that 12 panel system sends about 5,093 kWh a year to the grid, worth around £611. The tariff guide compares the export rates that could apply to your setup.
Get your free quote
Takes about two minutes. We work out your options, then confirm your free remote design call, on video, at a time that suits you. It starts with your roof and your numbers, and the design is built around them rather than around a product someone needs to shift.
Reading for Mountain Ash homeowners
Independent, sourced and dated. The same ground we cover on your free call.
Single phase or three phase? The sixty-second check that decides your system size
One look at your fuse board sets the ceiling on how much solar you can connect.
Read the guide →Tesla Powerwall 3 against the alternatives, and where each one wins
The strongest single box in the market, and the houses it is still wrong for.
Read the guide →Charging an EV from your own solar
Every surplus kWh is 3.6 to 5 miles. Whether that beats a 7p overnight rate is arithmetic.
Read the guide →What are the disadvantages of a heat pump? Six honest ones
Six real disadvantages, worth planning around rather than a reason to rule one out.
Read the guide →Why the best export rates always carry conditions
The top export rates are acquisition offers. Here is how to price the condition.
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 →How Mountain Ash compares with its neighbours
Same satellite dataset, same assumptions, so the differences are real geography rather than modelling noise.
| Town | kWh per kWp | Peak sun hours | vs Mountain Ash |
|---|---|---|---|
| Mountain Ash | 948 | 2.60 | — |
| Aberdare | 940 | 2.57 | -8 kWh |
| Porth | 961 | 2.63 | +13 kWh |
| Rhondda | 882 | 2.42 | -66 kWh |
| Merthyr Tydfil | 942 | 2.58 | -6 kWh |
| Tonypandy | 956 | 2.62 | +8 kWh |
| Treorchy | 925 | 2.53 | -23 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 Mountain Ash: Solar panels in Mountain Ash from OVO Solar & Battery