Dunbartonshire
Solar panels in Helensburgh, priced before anyone visits.
A 12-panel roof in Helensburgh makes about 5,300 kWh a year and costs £6,360 installed; a free 30-minute video call sizes it to yours.
Get my free quote
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.
or call 07782 219224
- Free 30-minute video design call
- Priced before anyone visits
- Installed by our MCS-certified, fully insured teams
How much a Helensburgh roof makes, month by month
Helensburgh's best month is May, at 120 kWh per kWp; December manages 17.4. Over the year that comes to 834 kWh per kWp, 1% above our Dunbartonshire county estimate.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 19.6 |
| February | 39.6 |
| March | 69.1 |
| April | 103 |
| May | 120 |
| June | 111 |
| July | 110 |
| August | 96 |
| September | 71.6 |
| October | 48.1 |
| November | 28.9 |
| December | 17.4 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
For scale: 834 kWh per kWp in Helensburgh against 925, our GB average (the mean of our 85 county PVGIS estimates), which puts Helensburgh 10% below it.
How Helensburgh compares
Small towns rarely get published solar figures, so here are the numbers for Helensburgh. It is one of 7 Dunbartonshire towns we track, and it ranks 6th of 7 for solar yield, a town of 14,053 people in the House of Commons Library settlement data. PVGIS gives its roofs 834 kWh per kWp a year, 2.29 peak sun hours a day averaged across the seasons, and the standard 12 panel model turns that into £771 of year one benefit, £247 of it from your own generation and £524 from export at 12p.
Treat these as calibration rather than a quote. The calculator below runs the same model, opened on Helensburgh'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.
Planning applications here go through Argyll and Bute; nationally, the House of Commons Library classes Helensburgh 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.
Generation is modelled from PVGIS satellite data for Helensburgh's own coordinates (56.00393, -4.7334), using the same 26.32p/kWh import value and £1,000 per kWp installed pricing as every Clearline estimate; the methodology is on our help page.
The network operator for Helensburgh
The distribution network operator (DNO) for Helensburgh is SP Energy Networks, which runs the South and Central Scotland licence area.
G98 is the simple route. If the inverter, plus any battery, stays at or under 3.68kW per phase, SP Energy Networks only has to be told within 28 days after the system is commissioned.
Larger systems go through G99 instead, applied for before installation. On timing: 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 Helensburgh
A heat pump in Helensburgh
In December, the darkest month here, 12 panels in Helensburgh make about 110 kWh. That is when a heat pump runs hardest, so its running cost in Helensburgh comes down to the tariff and the flow temperature rather than the roof.
In Scotland, Home Energy Scotland offers a grant of up to £7,500 towards a heat pump, an optional interest-free loan of up to £7,500 on top, and £1,500 more for rural and island homes (Home Energy Scotland, checked 28 September 2026).
Charging an EV in Helensburgh
Summer is where a car earns its place. In May, 12 panels in Helensburgh make about 760 kWh, against roughly 70 kWh a typical home uses in daylight that month on our calculator's typical-use settings, so there is surplus a smart charger can put into the car instead of exporting it.
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 Helensburgh
If a system in Helensburgh is underperforming, start with the guides below: repair benchmarks, service scope, and the inverter question.
Helensburgh solar questions
How much energy would 12 solar panels make in Helensburgh?
Helensburgh averages 2.29 peak sun hours a day, which PVGIS turns into 834 kWh per kWp a year. On a 12-panel, 6.36 kWp roof that is about 5,300 kWh, 73% of it between April and September.
What does a typical solar system cost in Helensburgh?
Solar is priced at £1,000 per kWp installed wherever you live, so a 12-panel, 6.36 kWp system costs £6,360 in Helensburgh, exactly as it would anywhere else, before any battery. Location changes what the system makes, not what it costs: here that is about 5,300 kWh a year. The final figure comes from your roof on the design call.
Who is the network operator in Helensburgh, and do I need a G99 application?
The operator is SP Energy Networks. Most home systems use the G98 route, a notification within 28 days of switch-on for up to 3.68kW per phase, so nothing waits on the network. Above that, G99 applies and has to be granted 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. Your design call checks which route yours needs.
What happens to the solar I do not use in Helensburgh?
Around £524 a year at 12p per kWh, for the roughly 4,368 kWh a 12-panel system in Helensburgh exports with typical use. Rates vary by supplier and some need their own tariff; the export rates table is dated and sourced.
How does solar perform in Helensburgh in the winter months?
December is the weakest month in Helensburgh: about 110 kWh from 12 panels, against 760 kWh in May. The panels still generate on bright winter days; they just cover a smaller share of what the house uses.
How Helensburgh compares with its neighbours
The six closest towns we publish, run through the identical PVGIS query as Helensburgh.
| Town | kWh per kWp a year | vs Helensburgh |
|---|---|---|
| Helensburgh | 834 | this town |
| Greenock | 820 | −14 kWh |
| Gourock | 820 | −14 kWh |
| Port Glasgow | 810 | −24 kWh |
| Bonhill and Renton | 846 | +12 kWh |
| Dumbarton | 856 | +22 kWh |
| Bishopton | 857 | +23 kWh |
Same PVGIS v5.2 query for every town. Small differences are within year-to-year weather; more than about 30 kWh per kWp apart is geography.
Also for Helensburgh: Solar panels in Helensburgh 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.
Guides worth reading before your call
Sourced, dated and written by us. The same ground we cover on your free call.
How long do solar panels last? 25 to 30 years, in practice
The panels outlast the inverter by a wide margin. Plan for that, not for cleaning.
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 →Smart charge point regulations, explained
Why your charger arrives pre-set to charge overnight, and why it waits before it starts.
Read the guide →Heat pump running costs versus a gas boiler, assumptions shown
Four numbers decide it: seasonal efficiency, flow temperature, tariff and heat demand.
Read the guide →EV tariffs compared: the cheapest overnight windows
Overnight rates of 6.99p to 9p against a 26.32p capped average, compared.
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.