Devon
Solar panels in Cullompton, designed on a free call.
Twelve panels (6.36 kWp) here make about 6,530 kWh a year for £6,360 installed, designed around your roof 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
Sunlight in Cullompton, in numbers
Cullompton's best month is May, at 124.4 kWh per kWp; December manages 35.4. Over the year that comes to 1,026 kWh per kWp, 5% above our Devon county estimate.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 39 |
| February | 56.4 |
| March | 91.5 |
| April | 120 |
| May | 124 |
| June | 122 |
| July | 122 |
| August | 108 |
| September | 95.3 |
| October | 66 |
| November | 46.1 |
| December | 35.4 |
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: Cullompton makes 1,026 kWh per kWp a year, and the mean of our 85 county PVGIS estimates (our GB average) is 925, so Cullompton is 11% above it.
How Cullompton compares
Small towns rarely get published solar figures, so here are the numbers for Cullompton. It is one of 23 Devon towns we track, and it ranks 17th of 23 for solar yield, a town of 9,320 people in the House of Commons Library settlement data. PVGIS gives its roofs 1,026 kWh per kWp a year, 2.81 peak sun hours a day averaged across the seasons, and the standard 12 panel model turns that into £918 of year one benefit, £247 of it from your own generation and £671 from export at 12p.
Treat these as calibration rather than a quote. The calculator below runs the same model, opened on Cullompton'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.
Any planning application in Cullompton sits with Mid Devon, 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.
The figures use PVGIS for the centre of Cullompton (50.85684, -3.39563), a 26.32p/kWh import price and £1,000 per kWp installed; see the help page for the full method.
NGED and your Cullompton connection
The distribution network operator (DNO) for Cullompton is National Grid Electricity Distribution (NGED), which runs the South West England licence area.
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.
Above that, G99 means applying before the work is booked. 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.
Heat pumps and EV charging in Cullompton
A heat pump in Cullompton
Heating demand peaks when solar is weakest. In Cullompton, a 12-panel system makes about 230 kWh in December and 250 kWh in January, a fraction of its 790 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 Cullompton
Cullompton's May output, about 790 kWh from 12 panels, is several times the 70 kWh or so a typical home uses in daylight that month on our calculator's settings. Daytime charging turns that surplus into miles.
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 Cullompton
If a system in Cullompton is underperforming, start with the guides below: repair benchmarks, service scope, and the inverter question.
Cullompton solar questions
How much energy would 12 solar panels make in Cullompton?
Cullompton averages 2.81 peak sun hours a day, which PVGIS turns into 1,026 kWh per kWp a year. On a 12-panel, 6.36 kWp roof that is about 6,530 kWh, 67% of it between April and September.
Is solar more expensive in Cullompton?
Prices on this site are the same everywhere: £1,000 per kWp installed, which puts a 12-panel system at £6,360 in Cullompton, and a Duracell Dura16 installed with solar at £4,450 on top. The local part is generation, about 6,530 kWh a year here, which is what drives payback.
Who is the network operator in Cullompton, and do I need a G99 application?
The operator is National Grid Electricity Distribution (NGED). 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. NGED's guaranteed standards give 45 working days for a low voltage generation quotation, with £80 paid for each working day late. Your design call checks which route yours needs.
What could I earn from exporting in Cullompton?
On the 12p export scenario, a 12-panel system in Cullompton sends about 5,589 kWh a year to the grid, worth around £671. The export rates table compares what each supplier pays.
How does solar perform in Cullompton in the winter months?
December is the weakest month in Cullompton: about 230 kWh from 12 panels, against 790 kWh in May. The panels still generate on bright winter days; they just cover a smaller share of what the house uses.
How Cullompton compares with its neighbours
How the towns nearest Cullompton compare on the same PVGIS settings, closest first.
| Town | kWh per kWp a year | vs Cullompton |
|---|---|---|
| Cullompton | 1,026 | this town |
| Tiverton | 1,017 | −9 kWh |
| Honiton | 1,060 | +34 kWh |
| Exeter | 1,060 | +34 kWh |
| Wellington | 1,008 | −18 kWh |
| Crediton | 1,020 | −6 kWh |
| Sidmouth | 1,080 | +54 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 Cullompton: Solar panels in Cullompton from OVO Solar & Battery
See a number before you speak to anyone
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Reading for Cullompton homeowners
Sourced, dated and written by us. The same ground we cover on your free call.
Do you need planning permission for solar panels? Usually not
Usually not, provided the installation stays within the limits updated on 27 August 2026.
Read the guide →Tesla Powerwall 3 vs Duracell Dura16: which fits your home?
The two packages we actually price, compared on the numbers that decide it.
Read the guide →How time of use charging windows actually work
How a cheap overnight window is metered and billed, and what a battery does inside it.
Read the guide →How much does a heat pump cost? The 2026 numbers, before and after the grant
UK median installed cost around £12,908, before the up to £7,500 grant comes off.
Read the guide →Why tariff choice moves payback more than kit choice
Identical kit, five times the export income. The tariff decision worked through with August 2026 rates.
Read the guide →What MCS certification actually is, and why your export payments depend on it
The badge that decides whether your solar earns export payments. It cannot be added later.
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.