Glamorgan, Wales
Solar and batteries in Glamorgan, sized to your roof.
About 5,980 kWh a year from 12 panels in Glamorgan, £6,360 installed, with your system designed on a free 30-minute video call.
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or call 07782 219224
- Free 30-minute video design call
- Priced before anyone visits
- Installed by our MCS-certified, fully insured teams
Glamorgan's solar year
From 25.9 kWh per kWp in December to 121.7 in May: a roof in Glamorgan makes 4.7 times as much in its best month as in its darkest, and 940 kWh per kWp across the year.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 28.9 |
| February | 49.7 |
| March | 84.8 |
| April | 113 |
| May | 122 |
| June | 116 |
| July | 115 |
| August | 100 |
| September | 88.2 |
| October | 58.1 |
| November | 37.8 |
| December | 25.9 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
Our GB average is 925 kWh per kWp a year, the mean of the 85 county PVGIS estimates we publish; at 940, Glamorgan is 2% above it.
How Glamorgan compares
Glamorgan ranks 40th of the 85 counties we track for solar yield, 2% above the Wales average of our estimates. At 2.58 peak sun hours a day the sums lean on a healthy mix: £247 of the year one benefit here comes from solar you use yourself, with export at 12p adding £605.
Every figure here assumes a clear, south-facing roof at 35 degrees in the middle of Glamorgan. Yours will differ; the calculator below lets you test panels, batteries and export rates first.
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.
Generation from PVGIS v5.2 (European Commission JRC, SARAH3), retrieved August 2026 for a representative point in Glamorgan (51.6044, -3.6021), assuming 1 kWp, 14% system loss, 35 degree pitch, due south. Import valued at 26.32p/kWh (Ofgem price cap average, Oct to Dec 2026); off-peak charging at 8.5p/kWh where used (a supplier's published off-peak rate, checked September 2026); export at the scenario you pick, from the dated tariff table. Prices are installed pricing, August 2026, standard installations; 530W LONGi panels at £1,000 per kWp. Estimates for illustration, not a quote: your free design call prices your actual roof.
Who runs the grid in Glamorgan
On NESO's licence-area map, the middle of Glamorgan falls in South Wales, which National Grid Electricity Distribution (NGED) operates, and so do all the towns we cover in the county.
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.
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.
Beyond the panels: heating and car charging in Glamorgan
A heat pump in Glamorgan
A heat pump does most of its work from November to February. Over those four months, 12 panels in Glamorgan make about 910 kWh, against 2,880 kWh from May to August, so winter heating runs mostly on grid electricity and the tariff matters more than the roof.
Grant support in Wales comes from the Boiler Upgrade Scheme: £7,500 for an air source or ground source heat pump, £2,500 for air-to-air, and an extra £1,500 until March 2027 where the home is heated by oil or LPG off the gas grid (gov.uk, checked 28 September 2026).
Charging an EV in Glamorgan
From April to September, 70% of a Glamorgan roof's yearly output arrives, peaking at about 770 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.
Installed prices, the same across Glamorgan
Every system is designed around your roof on the free call before anything is fitted.
Common questions about solar in Glamorgan
What does a solar panel system produce in Glamorgan?
Each kWp of panels in Glamorgan makes 940 kWh a year on PVGIS figures, so a typical 12-panel system produces around 5,980 kWh, from about 160 kWh in December up to 770 kWh in May.
What would 12 solar panels cost in Glamorgan?
£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 Glamorgan differs is output: about 5,980 kWh a year from that system.
Would a system in Glamorgan need approval from the network operator?
Glamorgan 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 would export pay on a system in Glamorgan?
It is exported. With typical use and no battery, about 5,042 kWh of the 5,980 kWh a 12-panel system makes in Glamorgan goes to the grid, around £605 a year at 12p. A battery keeps more of it for the evening; the export rates table shows what suppliers pay.
Is solar worth it in Glamorgan in winter?
It works, but the year is lopsided. 70% of a Glamorgan roof's output lands between April and September; the four months from November to February give about 910 kWh on a 12-panel system. Payback is worked out on the whole year, not the winter.
Towns we cover in Glamorgan
32 Glamorgan towns have their own page, each with PVGIS figures, a network operator and a monthly curve for its own location.
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 Glamorgan homeowners
The same guidance we would talk through on your call, written down and sourced.
Do solar panels increase home value? What the actual data shows
The largest UK study found a 6.1% to 7.1% sale price premium. Here is the full picture.
Read the guide →Does a standalone battery actually pay back?
No panels means one job: buy cheap, use later. The tariff decides whether it pays.
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 →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 →How to check an MCS certificate is genuine, before the deposit leaves your account
A logo proves nothing. Certification is business specific, technology specific and checkable.
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.