Glamorgan
Solar panels in Barry, sized to your roof.
About 6,740 kWh a year from 12 panels in Barry, £6,360 installed, with your system designed on a free 30-minute video call.
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- Free 30-minute video design call
- Priced before anyone visits
- Installed by our MCS-certified, fully insured teams
What a roof in Barry can generate
PVGIS puts Barry at 1,060 kWh per kWp a year, 13% above our Glamorgan county estimate. 69% of it arrives between April and September, peaking in May.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 37.1 |
| February | 56.3 |
| March | 92.3 |
| April | 122 |
| May | 135 |
| June | 132 |
| July | 132 |
| August | 114 |
| September | 98.5 |
| October | 64 |
| November | 42.8 |
| December | 33.7 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
For scale: 1,060 kWh per kWp in Barry against 925, our GB average (the mean of our 85 county PVGIS estimates), which puts Barry 15% above it.
How Barry compares
Among the places we publish figures for, Barry is one of 32 Glamorgan towns we track, and it ranks 2nd of 32 for solar yield. It is a medium town in the House of Commons Library classification, with 58,388 residents, and its roofs see 2.90 peak sun hours a day across the year. That drives the standard 12 panel model to 6,742 kWh of generation, of which around 5,805 kWh is exported at 12p for £697 a year, with £247 saved on electricity you would otherwise buy at 26.32p.
Every figure here assumes a clear, south-facing roof at 35 degrees. Yours will differ, which is what the free design call is for; until then, the calculator below tests panels, batteries and export rates on Barry's own yield.
Barry sits within Vale of Glamorgan, its local planning authority, and the House of Commons Library classes it 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.
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 Barry at 51.40806, -3.26306 on PVGIS data, with imports valued at 26.32p/kWh and solar at £1,000 per kWp installed. Sources and assumptions: help page.
Connecting solar to the Barry network
The distribution network operator (DNO) for Barry is National Grid Electricity Distribution (NGED), which runs the South Wales licence area.
For a typical home the paperwork is light: a system of up to 3.68kW per phase goes through G98, which means NGED is notified within 28 days of switch-on rather than asked beforehand.
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 Barry
A heat pump in Barry
Solar and a heat pump pull in opposite directions through the year: Barry's roofs make 1,080 kWh from November to February on a 12-panel system, and 3,270 kWh from May to August. The heating season leans on the grid, so off-peak rates do the heavy lifting.
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 Barry
A 12-panel roof in Barry makes about 860 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.
The calculator above includes a 7.4kW smart charger from £1,100 installed. Renters and flat owners with off-street parking can claim 75% of a chargepoint's cost, up to £500 per socket, until 31 March 2027 (gov.uk, checked 28 September 2026).
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 Barry
Guidance is nationwide, so the benchmarks hold in Barry: repair costs, service scope, and when the inverter is the real fault.
Solar in Barry: your questions answered
What could a roof in Barry generate?
PVGIS puts a roof in Barry at 1,060 kWh per kWp a year, 2.90 peak sun hours a day averaged across the seasons. A 12-panel, 6.36 kWp system makes about 6,740 kWh a year, most of it between April and September.
How much are solar panels in Barry?
The price does not move by postcode. At £1,000 per kWp installed, 12 panels (6.36 kWp) come to £6,360 in Barry before a battery. What Barry changes is the return, about 6,740 kWh a year from that system, and your design call prices your actual roof.
Do I need permission from the DNO for solar in Barry?
Usually not in advance. NGED, the network operator for Barry, 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 can I earn from exporting solar in Barry?
With typical use and no battery, a 12-panel system in Barry exports about 5,805 kWh a year. At 12p per kWh that is roughly £697; a supplier paying more, or a battery that keeps more for the evening, changes the figure. See the export rates table.
Do solar panels work in winter in Barry?
Yes, at a lower level. PVGIS gives Barry 33.7 kWh per kWp in December and 37.1 in January, so a 12-panel system makes about 210 kWh and 240 kWh in those months, against 860 kWh in May. Winter output mostly covers daytime use rather than exporting.
How Barry compares with its neighbours
Same satellite dataset, same assumptions, so the differences are real geography rather than modelling noise.
| Town | kWh per kWp a year | vs Barry |
|---|---|---|
| Barry | 1,060 | this town |
| Dinas Powis | 1,058 | −2 kWh |
| Penarth | 1,055 | −5 kWh |
| Cardiff | 1,024 | −36 kWh |
| Church Village | 1,001 | −59 kWh |
| Caerphilly | 1,018 | −42 kWh |
| Llanharan and Brynna | 1,044 | −16 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 Barry: Solar panels in Barry from OVO Solar & Battery
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Further reading for Barry
Sourced, dated and written by us. The same ground we cover on your free call.
Best solar panels UK 2026: what the datasheets actually say
One pick per job, the specs behind each, and what moves payback more than the badge.
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 →How an air source heat pump actually works
It moves heat rather than making it. The cycle, the efficiency numbers and the trade-offs.
Read the guide →Which tariffs are actually built for battery charging
A battery buys cheap and uses dear. The tariff decides how much that is worth.
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.