Dunbartonshire
Solar panels in Dumbarton, with the numbers shown.
About 5,440 kWh a year from 12 panels in Dumbarton, £6,360 installed, with your system designed on a free 30-minute video call.
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Dumbarton's solar year
PVGIS puts Dumbarton at 856 kWh per kWp a year, 4% above our Dunbartonshire county estimate. 73% of it arrives between April and September, peaking in May.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 21.7 |
| February | 41.3 |
| March | 70.9 |
| April | 105 |
| May | 120 |
| June | 113 |
| July | 113 |
| August | 98.1 |
| September | 73.8 |
| October | 50.8 |
| November | 30.2 |
| December | 18.2 |
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 856, Dumbarton is 7% below it.
How Dumbarton compares
Small towns rarely get published solar figures, so here are the numbers for Dumbarton. It is one of 7 Dunbartonshire towns we track, and it ranks 2nd of 7 for solar yield, a town of 20,838 people in the House of Commons Library settlement data. PVGIS gives its roofs 856 kWh per kWp a year, 2.35 peak sun hours a day averaged across the seasons, and the standard 12 panel model turns that into £788 of year one benefit, £247 of it from your own generation and £541 from export at 12p.
Treat these as calibration rather than a quote. The calculator below runs the same model, opened on Dumbarton'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.
West Dunbartonshire is the planning authority covering Dumbarton, 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.
The figures use PVGIS for the centre of Dumbarton (55.94566, -4.56671), a 26.32p/kWh import price and £1,000 per kWp installed; see the help page for the full method.
Who runs the grid in Dumbarton
Dumbarton is served by SP Energy Networks: the town's centre falls inside its South and Central Scotland 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 SP Energy Networks 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. Ofgem's guaranteed standard for a low voltage generation connection quotation is 45 working days, with £80 paid for each working day late, and it binds SP Energy Networks as it does every network operator.
Sources: NESO DNO licence areas (3 May 2024); Ofgem, Distributed Generation Standards Direction guidance, checked 27 September 2026. G98 vs G99, explained.
Heat pumps and EV charging in Dumbarton
A heat pump in Dumbarton
A heat pump does most of its work from November to February. Over those four months, 12 panels in Dumbarton make about 710 kWh, against 2,830 kWh from May to August, so winter heating runs mostly on grid electricity and the tariff matters more than the roof.
Scottish homes apply through Home Energy Scotland rather than the Boiler Upgrade Scheme: up to £7,500 in grant for a heat pump, up to £7,500 more as an optional interest-free loan, and a £1,500 uplift for rural and island homes (checked 28 September 2026).
Charging an EV in Dumbarton
From April to September, 73% of a Dumbarton 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.
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).
Installed prices, the same in every town
Every system is designed around your roof on the free call before anything is fitted.
Solar panel servicing and repair in Dumbarton
Faults, servicing and ageing inverters follow the same economics in Dumbarton as anywhere else, and the guides below price them plainly.
Dumbarton solar questions
What does a solar panel system produce in Dumbarton?
Each kWp of panels in Dumbarton makes 856 kWh a year on PVGIS figures, so a typical 12-panel system produces around 5,440 kWh, from about 120 kWh in December up to 770 kWh in May.
How much are solar panels in Dumbarton?
The price does not move by postcode. At £1,000 per kWp installed, 12 panels (6.36 kWp) come to £6,360 in Dumbarton before a battery. What Dumbarton changes is the return, about 5,440 kWh a year from that system, and your design call prices your actual roof.
Would a system in Dumbarton need approval from the network operator?
Dumbarton is on SP Energy Networks' network (South and Central Scotland licence area). Systems up to 3.68kW per phase of inverter output follow G98: SP Energy Networks is notified within 28 days of commissioning, with no approval needed first. Anything larger needs a G99 application before installation. Ofgem's guaranteed standard for a low voltage generation connection quotation is 45 working days, with £80 paid for each working day late, and it binds SP Energy Networks as it does every network operator. Our G98 vs G99 guide explains both routes.
How much can I earn from exporting solar in Dumbarton?
With typical use and no battery, a 12-panel system in Dumbarton exports about 4,507 kWh a year. At 12p per kWh that is roughly £541; 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 Dumbarton in winter?
It works, but the year is lopsided. 73% of a Dumbarton roof's output lands between April and September; the four months from November to February give about 710 kWh on a 12-panel system. Payback is worked out on the whole year, not the winter.
How Dumbarton compares with its neighbours
The six closest towns we publish, run through the identical PVGIS query as Dumbarton.
| Town | kWh per kWp a year | vs Dumbarton |
|---|---|---|
| Dumbarton | 856 | this town |
| Bonhill and Renton | 846 | −10 kWh |
| Bishopton | 857 | +1 kWh |
| Erskine | 861 | +5 kWh |
| Port Glasgow | 810 | −46 kWh |
| Clydebank | 859 | +3 kWh |
| Linwood | 851 | −5 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 Dumbarton: Solar panels in Dumbarton from OVO Solar & Battery
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Guides worth reading before your call
Sourced, dated and written by us. The same ground we cover on your free call.
Solar panel grants and funding in 2026: what actually exists, and what is a sales pitch
No blanket grant exists, and the four supports that do exist are better than most of the adverts.
Read the guide →Inside a home battery: capacity, power and losses
Usable capacity, kW output, round trip losses and chemistry, in plain terms.
Read the guide →How solar aware EV charging actually works
The CT clamp, the surplus tracking and the 1.4kW floor that catches people out.
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 →What the Smart Export Guarantee actually is
The scheme obliges suppliers to pay above zero, and leaves the rate to them.
Read the guide →MCS, HIES, RECC, NAPIT, TrustMark and Flexi-Orb: which badge does what
Six logos, six different jobs. What each scheme covers, and which are actually required.
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.