Gloucestershire
Solar panels in Thornbury, priced before anyone visits.
About 6,510 kWh a year from 12 panels in Thornbury, £6,360 installed, with your system designed 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
How much a Thornbury roof makes, month by month
Thornbury's best month is July, at 127.5 kWh per kWp; December manages 34.7. Over the year that comes to 1,024 kWh per kWp, 2% above our Gloucestershire county estimate.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 38.1 |
| February | 53.3 |
| March | 87.8 |
| April | 117 |
| May | 126 |
| June | 124 |
| July | 128 |
| August | 110 |
| September | 96.2 |
| October | 65.5 |
| November | 44 |
| December | 34.7 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
For scale: 1,024 kWh per kWp in Thornbury against 925, our GB average (the mean of our 85 county PVGIS estimates), which puts Thornbury 11% above it.
How Thornbury compares
Small towns rarely get published solar figures, so here are the numbers for Thornbury. It is one of 24 Gloucestershire towns we track, and it ranks joint 1st of 24 for solar yield, a town of 14,381 people in the House of Commons Library settlement data. PVGIS gives its roofs 1,024 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 £916 of year one benefit, £247 of it from your own generation and £669 from export at 12p.
These are starting numbers, not a quote. The calculator below opens on Thornbury'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 Thornbury sits with South Gloucestershire, 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 Thornbury (51.61122, -2.5173), a 26.32p/kWh import price and £1,000 per kWp installed; see the help page for the full method.
The network operator for Thornbury
Thornbury is served by National Grid Electricity Distribution (NGED): the town's centre falls inside its West Midlands licence area on NESO's boundary map.
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: NGED 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: 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.
Adding a heat pump or an EV charger in Thornbury
A heat pump in Thornbury
In December, the darkest month here, 12 panels in Thornbury make about 220 kWh. That is when a heat pump runs hardest, so its running cost in Thornbury comes down to the tariff and the flow temperature rather than the roof.
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 Thornbury
Summer is where a car earns its place. In July, 12 panels in Thornbury make about 810 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.
If you rent, or own a flat, and have private off-street parking, the government chargepoint grant covers 75% of the cost, capped at £500 a socket, until 31 March 2027 (gov.uk, checked 28 September 2026). The calculator above prices 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 Thornbury
The same sourced benchmarks apply in Thornbury as everywhere we cover: honest repair pricing and what a service should include.
Common questions about solar in Thornbury
How much electricity do solar panels make in Thornbury?
About 6,510 kWh a year from 12 panels (6.36 kWp), on PVGIS satellite data for Thornbury: 1,024 kWh per kWp, or 2.81 peak sun hours a day on average. July is the strongest month, at about 810 kWh.
What does a typical solar system cost in Thornbury?
Solar is priced at £1,000 per kWp installed wherever you live, so a 12-panel, 6.36 kWp system costs £6,360 in Thornbury, exactly as it would anywhere else, before any battery. Location changes what the system makes, not what it costs: here that is about 6,510 kWh a year. The final figure comes from your roof on the design call.
Which DNO covers Thornbury, and what does it need from me?
National Grid Electricity Distribution (NGED) covers Thornbury. A home system of up to 3.68kW per phase is notified to NGED within 28 days of commissioning under G98, and nothing waits on approval. Larger outputs need a G99 application before work starts. NGED's guaranteed standards give 45 working days for a low voltage generation quotation, with £80 paid for each working day late.
What happens to the solar I do not use in Thornbury?
Around £669 a year at 12p per kWh, for the roughly 5,576 kWh a 12-panel system in Thornbury exports with typical use. Rates vary by supplier and some need their own tariff; the export rates table is dated and sourced.
How much solar does Thornbury get in December?
December is the low point: about 220 kWh from a 12-panel system in Thornbury, on PVGIS data, rising to 810 kWh in July. From November to February the same system makes about 1,080 kWh in total, which is why a battery charged off-peak does more of the work in winter.
How Thornbury compares with its neighbours
Same satellite dataset, same assumptions, so the differences are real geography rather than modelling noise.
| Town | kWh per kWp a year | vs Thornbury |
|---|---|---|
| Thornbury | 1,024 | this town |
| Bradley Stoke | 1,009 | −15 kWh |
| Frampton Cotterell and Winterbourne | 1,001 | −23 kWh |
| Patchway | 1,013 | −11 kWh |
| Yate | 1,000 | −24 kWh |
| Chepstow | 1,032 | +8 kWh |
| Stoke Gifford | 1,010 | −14 kWh |
Each row is a PVGIS v5.2 run at that town's centre with the same settings. Treat gaps of a few kWh as noise and gaps over about 30 kWh per kWp as real differences in sunshine.
Also for Thornbury: Solar panels in Thornbury from OVO Solar & Battery
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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.
Further reading for Thornbury
Sourced, dated and written by us. The same ground we cover on your free call.
How many solar panels do I need? The honest way to count
One panel is 2.26 square metres. The rest is measuring your roof honestly.
Read the guide →How much a battery saves by charging on cheap night rates
What charging at 8.5p and using at 26.32p is actually worth over a year.
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 →Are heat pumps worth it? The real 2026 numbers
Electricity costs 3.3x gas per kWh. A heat pump is about 3x as efficient. The numbers nearly cancel 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 →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.