Glamorgan
Solar panels in Gorseinon, sized to your roof.
A 12-panel roof in Gorseinon makes about 6,610 kWh a year and costs £6,360 installed; a free 30-minute video call sizes it to yours.
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Gorseinon's solar year
Gorseinon's best month is May, at 131.6 kWh per kWp; December manages 33.1. Over the year that comes to 1,040 kWh per kWp, 11% above our Glamorgan county estimate.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 36.1 |
| February | 56.5 |
| March | 91.2 |
| April | 121 |
| May | 132 |
| June | 130 |
| July | 127 |
| August | 112 |
| September | 95.3 |
| October | 63.5 |
| November | 42.8 |
| December | 33.1 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
For scale: 1,040 kWh per kWp in Gorseinon against 925, our GB average (the mean of our 85 county PVGIS estimates), which puts Gorseinon 12% above it.
How Gorseinon compares
Small towns rarely get published solar figures, so here are the numbers for Gorseinon. It is one of 32 Glamorgan towns we track, and it ranks 11th of 32 for solar yield, a town of 14,517 people in the House of Commons Library settlement data. PVGIS gives its roofs 1,040 kWh per kWp a year, 2.85 peak sun hours a day averaged across the seasons, and the standard 12 panel model turns that into £928 of year one benefit, £247 of it from your own generation and £681 from export at 12p.
Treat these as calibration rather than a quote. The calculator below runs the same model, opened on Gorseinon'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.
Swansea is the planning authority covering Gorseinon, 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 Gorseinon at 51.66867, -4.04358 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 Gorseinon
Gorseinon 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.
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 Gorseinon
A heat pump in Gorseinon
A heat pump does most of its work from November to February. Over those four months, 12 panels in Gorseinon make about 1,070 kWh, against 3,180 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 Gorseinon
A 12-panel roof in Gorseinon makes about 840 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.
Renters and flat owners with private off-street parking can get 75% off a chargepoint and its installation, up to £500 per socket, until 31 March 2027 (gov.uk, checked 28 September 2026). The calculator above adds 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 Gorseinon
Faults, servicing and ageing inverters follow the same economics in Gorseinon as anywhere else, and the guides below price them plainly.
Solar in Gorseinon: your questions answered
What does a solar panel system produce in Gorseinon?
Each kWp of panels in Gorseinon makes 1,040 kWh a year on PVGIS figures, so a typical 12-panel system produces around 6,610 kWh, from about 210 kWh in December up to 840 kWh in May.
How much are solar panels in Gorseinon?
The price does not move by postcode. At £1,000 per kWp installed, 12 panels (6.36 kWp) come to £6,360 in Gorseinon before a battery. What Gorseinon changes is the return, about 6,610 kWh a year from that system, and your design call prices your actual roof.
Would a system in Gorseinon need approval from the network operator?
Gorseinon 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 Gorseinon?
With typical use and no battery, a 12-panel system in Gorseinon exports about 5,678 kWh a year. At 12p per kWh that is roughly £681; 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 Gorseinon in winter?
It works, but the year is lopsided. 69% of a Gorseinon roof's output lands between April and September; the four months from November to February give about 1,070 kWh on a 12-panel system. Payback is worked out on the whole year, not the winter.
How Gorseinon compares with its neighbours
How the towns nearest Gorseinon compare on the same PVGIS settings, closest first.
| Town | kWh per kWp a year | vs Gorseinon |
|---|---|---|
| Gorseinon | 1,040 | this town |
| Gowerton | 1,063 | +23 kWh |
| Llanelli | 1,064 | +24 kWh |
| Swansea | 1,023 | −17 kWh |
| Clydach | 981 | −59 kWh |
| Ammanford | 969 | −71 kWh |
| Neath | 996 | −44 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 Gorseinon: Solar panels in Gorseinon from OVO Solar & Battery
See a number before you speak to anyone
Answer a few questions about your roof and usage and see an instant solar and battery estimate. No email needed to see the result.
Reading for Gorseinon homeowners
Sourced, dated and written by us. The same ground we cover on your free call.
How to clean solar panels, and whether you need to at all
Cleaning is oversold and pigeon mesh is undersold. The numbers behind both.
Read the guide →GivEnergy in administration: what owners should do now
The sourced timeline, the warranty position, and the owner's checklist for this month.
Read the guide →How time of use charging windows actually work
How a cheap overnight window is metered and billed, and what a battery does inside it.
Read the guide →Sizing a heat pump: what a proper survey covers
Sized by calculation, not by rule of thumb. What the survey covers, and what guessing costs.
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 →Your MCS certificate: what it shows, when it arrives, and how a Smart Export Guarantee supplier uses it
The document your export payments hang on. Who issues it, what it shows, and how to get a copy.
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.