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CarmarthenshireSolar panels in Llanelli,
priced honestly.
Independent guidance on solar and battery storage for Llanelli homes in Carmarthenshire: 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 Llanelli at 1,064 kWh per kWp a year, 14% above our Carmarthenshire county estimate.
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What a roof in Llanelli can generate
Real satellite data for Llanelli, real installed pricing, and the same honest model we run for every place we cover.
How Llanelli compares
Among the places we publish figures for, Llanelli is one of 3 Carmarthenshire towns we track, and it ranks 1st of 3 for solar yield. It is a medium town in the House of Commons Library classification, with 42,685 residents, and its roofs see 2.91 peak sun hours a day across the year. That drives the standard 12 panel model to 6,767 kWh of generation, of which around 5,830 kWh is exported at 12p for £700 a year, with £247 saved on electricity you would otherwise buy at 26.32p.
Treat these as calibration rather than a quote. The calculator below runs the same model, defaulted to Llanelli's own yield, and at Llanelli's 1,064 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.
Planning applications here go through Carmarthenshire; nationally, the House of Commons Library classes Llanelli as a medium 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 Llanelli generates around 6,767 kWh a year, worth around £946 in year one on the 12p export scenario.
Generation is modelled from PVGIS satellite data for Llanelli's own coordinates (51.68399, -4.14172), 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 Llanelli
If a system in Llanelli is underperforming, start with the guides below: repair benchmarks, service scope, and the inverter question.
Common questions about solar in Llanelli
What could a roof in Llanelli generate?
PVGIS puts a roof in Llanelli at 1,064 kWh per kWp a year, 2.91 peak sun hours a day averaged across the seasons.
What does a typical solar system cost in Llanelli?
A typical 12 panel, 6.36 kWp system in Llanelli costs around £6,360 installed, at £1,000 per kWp before any battery.
Would a system in Llanelli 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 Llanelli before anything is booked; our G98 vs G99 guide explains the difference in full.
What could I earn from exporting in Llanelli?
On the 12p export scenario, that 12 panel system sends about 5,830 kWh a year to the grid, worth around £700. 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 Llanelli homeowners
Independent, sourced and dated. 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.
Read the guide →What a battery gateway actually does
Without a gateway your system shuts down when the grid does. Here is what the box actually does.
Read the guide →Three phase and EV charging: what actually changes
Three phase buys 22kW charging. Most cars cannot use it, and load balancing usually solves the real problem.
Read the guide →Are heat pumps worth it? The real 2026 numbers
Electricity costs 3.3x gas per kWh. A heat pump is about 3x as efficient. The numbers nearly cancel out.
Read the guide →The price cap explained, and what it does to solar payback
The cap limits unit rates, not bills. That changes what solar payback means.
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 Llanelli 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 Llanelli |
|---|---|---|---|
| Llanelli | 1,064 | 2.91 | — |
| Gorseinon | 1,040 | 2.85 | -24 kWh |
| Gowerton | 1,063 | 2.91 | -1 kWh |
| Swansea | 1,023 | 2.80 | -41 kWh |
| Ammanford | 969 | 2.65 | -95 kWh |
| Clydach | 981 | 2.69 | -83 kWh |
| Carmarthen | 980 | 2.68 | -84 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 Llanelli: Solar panels in Llanelli from OVO Solar & Battery