Caernarfonshire
Solar panels in Caernarfon, priced before anyone visits.
Twelve panels (6.36 kWp) here make about 5,670 kWh a year for £6,360 installed, designed around your roof on a free 30-minute video call.
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 Caernarfon roof makes, month by month
From 21.8 kWh per kWp in December to 120 in May: a roof in Caernarfon makes 5.5 times as much in its best month as in its darkest, and 891 kWh per kWp across the year.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 27.5 |
| February | 45.7 |
| March | 78.4 |
| April | 108 |
| May | 120 |
| June | 117 |
| July | 111 |
| August | 97.1 |
| September | 80.2 |
| October | 52.2 |
| November | 33 |
| December | 21.8 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
Against Great Britain as a whole: Caernarfon makes 891 kWh per kWp a year, and the mean of our 85 county PVGIS estimates (our GB average) is 925, so Caernarfon is 4% below it.
How Caernarfon compares
Small towns rarely get published solar figures, so here are the numbers for Caernarfon. It is one of 4 Caernarfonshire towns we track, and it ranks 3rd of 4 for solar yield, a town of 10,299 people in the House of Commons Library settlement data. PVGIS gives its roofs 891 kWh per kWp a year, 2.44 peak sun hours a day averaged across the seasons, and the standard 12 panel model turns that into £815 of year one benefit, £247 of it from your own generation and £568 from export at 12p.
These are starting numbers, not a quote. The calculator below opens on Caernarfon's own PVGIS figure; change the panels, the battery or the export rate and it reruns. The design call replaces every assumption with your roof and your bills.
Any planning application in Caernarfon sits with Gwynedd, and its official House of Commons Library settlement class is 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 Caernarfon's own coordinates (53.14152, -4.2618), 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.
SP Energy Networks and your Caernarfon connection
SP Energy Networks owns and runs the local electricity network in Caernarfon, as part of its North Wales, Merseyside and Cheshire licence area.
What decides the paperwork is the inverter and battery output, not the number of panels. Up to 3.68kW per phase, a system follows G98: SP Energy Networks is notified within 28 days of commissioning and nothing has to be approved first.
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.
Adding a heat pump or an EV charger in Caernarfon
A heat pump in Caernarfon
Heating demand peaks when solar is weakest. In Caernarfon, a 12-panel system makes about 140 kWh in December and 170 kWh in January, a fraction of its 760 kWh in May, which is why a heat pump here is costed on its tariff first.
The Boiler Upgrade Scheme, open in England and Wales, takes £7,500 off an air source or ground source heat pump, or £2,500 off an air-to-air unit. Homes on oil or LPG with no mains gas get £1,500 more until March 2027 (gov.uk, checked 28 September 2026).
Charging an EV in Caernarfon
Summer is where a car earns its place. In May, 12 panels in Caernarfon 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.
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 Caernarfon
If a system in Caernarfon is underperforming, start with the guides below: repair benchmarks, service scope, and the inverter question.
Common questions about solar in Caernarfon
How much energy would 12 solar panels make in Caernarfon?
Caernarfon averages 2.44 peak sun hours a day, which PVGIS turns into 891 kWh per kWp a year. On a 12-panel, 6.36 kWp roof that is about 5,670 kWh, 71% of it between April and September.
What does a typical solar system cost in Caernarfon?
Solar is priced at £1,000 per kWp installed wherever you live, so a 12-panel, 6.36 kWp system costs £6,360 in Caernarfon, exactly as it would anywhere else, before any battery. Location changes what the system makes, not what it costs: here that is about 5,670 kWh a year. The final figure comes from your roof on the design call.
Who is the network operator in Caernarfon, 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 Caernarfon?
Around £568 a year at 12p per kWh, for the roughly 4,730 kWh a 12-panel system in Caernarfon 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 Caernarfon in the winter months?
December is the weakest month in Caernarfon: about 140 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 Caernarfon compares with its neighbours
The six closest towns we publish, run through the identical PVGIS query as Caernarfon.
| Town | kWh per kWp a year | vs Caernarfon |
|---|---|---|
| Caernarfon | 891 | this town |
| Bangor | 808 | −83 kWh |
| Holyhead | 1,074 | +183 kWh |
| Conwy | 933 | +42 kWh |
| Llandudno | 966 | +75 kWh |
| Colwyn Bay | 933 | +42 kWh |
| Abergele | 950 | +59 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 Caernarfon: Solar panels in Caernarfon 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.
0% VAT on solar and batteries: what qualifies, and what does not
Zero VAT until 31 March 2027, then 5% returns. What qualifies, and what it is worth.
Read the guide →Sigenergy SigenStor review: the 5-in-1 tower examined
The 5-in-1 tower reviewed by a site that does not sell it, warranty arithmetic included.
Read the guide →What it really costs to charge an EV at home versus in public
Home off-peak charging costs a fraction of the public price. The arithmetic, and the tariff it depends on.
Read the guide →What are the disadvantages of a heat pump? Six honest ones
Six real disadvantages, worth planning around rather than a reason to rule one out.
Read the guide →Why the best export rates always carry conditions
The top export rates are acquisition offers. Here is how to price the condition.
Read the guide →HIES explained: what the badge actually protects, and when
What HIES protects: deposits up to 25 percent capped at 5,000 pounds, and your workmanship guarantee.
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.