Devon, England
Solar panels across Devon, designed on a free call.
Twelve panels (6.36 kWp) here make about 6,240 kWh a year for £6,360 installed, designed around your roof on a free 30-minute video call.
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Devon's solar year
PVGIS puts Devon at 981 kWh per kWp a year, 6% above the mean of our 85 county estimates. 70% of it arrives between April and September, peaking in May.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 30.3 |
| February | 51.7 |
| March | 87.7 |
| April | 116 |
| May | 123 |
| June | 121 |
| July | 122 |
| August | 111 |
| September | 93.9 |
| October | 62.3 |
| November | 39.4 |
| December | 22.7 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
For scale: 981 kWh per kWp in Devon against 925, our GB average (the mean of our 85 county PVGIS estimates), which puts Devon 6% above it.
How Devon compares
Devon ranks joint 31st of the 85 counties we track for solar yield, 2% below the England average of our estimates. At 2.69 peak sun hours a day the sums lean on a healthy mix: £247 of the year one benefit here comes from solar you use yourself, with export at 12p adding £636.
Every figure here assumes a clear, south-facing roof at 35 degrees in the middle of Devon. Yours will differ; the calculator below lets you test panels, batteries and export rates first.
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.
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Generation from PVGIS v5.2 (European Commission JRC, SARAH3), retrieved August 2026 for a representative point in Devon (50.7526, -3.8172), assuming 1 kWp, 14% system loss, 35 degree pitch, due south. Import valued at 26.32p/kWh (Ofgem price cap average, Oct to Dec 2026); off-peak charging at 8.5p/kWh where used (a supplier's published off-peak rate, checked September 2026); export at the scenario you pick, from the dated tariff table. Prices are installed pricing, August 2026, standard installations; 530W LONGi panels at £1,000 per kWp. Estimates for illustration, not a quote: your free design call prices your actual roof.
Who runs the grid in Devon
On NESO's licence-area map, the middle of Devon falls in South West England, which National Grid Electricity Distribution (NGED) operates, and so do all the towns we cover in the county.
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.
Anything bigger is a G99 case and is applied for first. 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 Devon
A heat pump in Devon
A heat pump does most of its work from November to February. Over those four months, 12 panels in Devon make about 920 kWh, against 3,030 kWh from May to August, so winter heating runs mostly on grid electricity and the tariff matters more than the roof.
Grant support in England 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 Devon
A 12-panel roof in Devon makes about 780 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 in Devon: your questions answered
What does a solar panel system produce in Devon?
Each kWp of panels in Devon makes 981 kWh a year on PVGIS figures, so a typical 12-panel system produces around 6,240 kWh, from about 140 kWh in December up to 780 kWh in May.
What would 12 solar panels cost in Devon?
£6,360 for 12 panels (6.36 kWp), the same as in every other place we cover, because solar is priced at £1,000 per kWp installed rather than by area. A battery adds its own installed price on top. Where Devon differs is output: about 6,240 kWh a year from that system.
Would a system in Devon need approval from the network operator?
Devon is on National Grid Electricity Distribution's network (South West England licence area). Systems up to 3.68kW per phase of inverter output follow G98: NGED is notified within 28 days of commissioning, with no approval needed first. Anything larger needs a G99 application before installation. NGED's guaranteed standards give 45 working days for a low voltage generation quotation, with £80 paid for each working day late. Our G98 vs G99 guide explains both routes.
How much would export pay on a system in Devon?
It is exported. With typical use and no battery, about 5,302 kWh of the 6,240 kWh a 12-panel system makes in Devon goes to the grid, around £636 a year at 12p. A battery keeps more of it for the evening; the export rates table shows what suppliers pay.
Is solar worth it in Devon in winter?
It works, but the year is lopsided. 70% of a Devon roof's output lands between April and September; the four months from November to February give about 920 kWh on a 12-panel system. Payback is worked out on the whole year, not the winter.
Towns we cover in Devon
23 Devon towns have their own page, each with PVGIS figures, a network operator and a monthly curve for its own location.
Nearby in England
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Answer a few questions about your roof and usage and see an instant solar and battery estimate. No email needed to see the result.
Reading for Devon homeowners
The same guidance we would talk through on your call, written down and sourced.
How do solar panels work? The full explanation, from photon to plug socket
Light into silicon, DC into AC, AC into your bill. The whole chain, explained.
Read the guide →What a battery gateway actually does
Without a gateway your system shuts down when the grid does. Here is what the box actually does.
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 →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 →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.