Wiltshire
Solar panels in Trowbridge, designed on a free call.
Twelve panels (6.36 kWp) here make about 6,500 kWh a year for £6,360 installed, designed around your roof on a free 30-minute video call.
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or call 07782 219224
- Free 30-minute video design call
- Priced before anyone visits
- Installed by our MCS-certified, fully insured teams
Sunlight in Trowbridge, in numbers
From 35 kWh per kWp in December to 125.5 in July: a roof in Trowbridge makes 3.6 times as much in its best month as in its darkest, and 1,022 kWh per kWp across the year.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 39.3 |
| February | 53.1 |
| March | 89.4 |
| April | 116 |
| May | 125 |
| June | 122 |
| July | 126 |
| August | 111 |
| September | 95.6 |
| October | 65.6 |
| November | 45.5 |
| December | 35 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
Our GB average is 925 kWh per kWp a year, the mean of the 85 county PVGIS estimates we publish; at 1,022, Trowbridge is 10% above it.
How Trowbridge compares
Among the places we publish figures for, Trowbridge is one of 20 Wiltshire towns we track, and it ranks 10th of 20 for solar yield. It is a medium town in the House of Commons Library classification, with 43,563 residents, and its roofs see 2.80 peak sun hours a day across the year. That drives the standard 12 panel model to 6,500 kWh of generation, of which around 5,563 kWh is exported at 12p for £668 a year, with £247 saved on electricity you would otherwise buy at 26.32p.
Every figure here assumes a clear, south-facing roof at 35 degrees. Yours will differ, which is what the free design call is for; until then, the calculator below tests panels, batteries and export rates on Trowbridge's own yield.
Planning applications here go through Wiltshire; nationally, the House of Commons Library classes Trowbridge as a medium 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 Trowbridge (51.32151, -2.20481), a 26.32p/kWh import price and £1,000 per kWp installed; see the help page for the full method.
SSEN and your Trowbridge connection
The distribution network operator (DNO) for Trowbridge is Scottish and Southern Electricity Networks (SSEN), which runs the Southern England licence area.
For a typical home the paperwork is light: a system of up to 3.68kW per phase goes through G98, which means SSEN is notified within 28 days of switch-on rather than asked beforehand.
Above that, G99 means applying before the work is booked. SSEN says it can take up to 45 working days to issue a quotation for a generation connection above 3.68kW per phase and up to 50kW.
Sources: NESO DNO licence areas (3 May 2024); SSEN, micro-generation connections page, checked 25 September 2026. G98 vs G99, explained.
Beyond the panels: heating and car charging in Trowbridge
A heat pump in Trowbridge
Heating demand peaks when solar is weakest. In Trowbridge, a 12-panel system makes about 220 kWh in December and 250 kWh in January, a fraction of its 800 kWh in July, 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 Trowbridge
Trowbridge's July output, about 800 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.
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.
The packages, priced before anyone visits
Every system is designed around your roof on the free call before anything is fitted.
Solar panel servicing and repair in Trowbridge
If a system in Trowbridge is underperforming, start with the guides below: repair benchmarks, service scope, and the inverter question.
Solar in Trowbridge: your questions answered
How much energy would 12 solar panels make in Trowbridge?
Trowbridge averages 2.80 peak sun hours a day, which PVGIS turns into 1,022 kWh per kWp a year. On a 12-panel, 6.36 kWp roof that is about 6,500 kWh, 68% of it between April and September.
Is solar more expensive in Trowbridge?
Prices on this site are the same everywhere: £1,000 per kWp installed, which puts a 12-panel system at £6,360 in Trowbridge, and a Duracell Dura16 installed with solar at £4,450 on top. The local part is generation, about 6,500 kWh a year here, which is what drives payback.
Who is the network operator in Trowbridge, and do I need a G99 application?
The operator is Scottish and Southern Electricity Networks (SSEN). 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. SSEN says it can take up to 45 working days to issue a quotation for a generation connection above 3.68kW per phase and up to 50kW. Your design call checks which route yours needs.
What could I earn from exporting in Trowbridge?
On the 12p export scenario, a 12-panel system in Trowbridge sends about 5,563 kWh a year to the grid, worth around £668. The export rates table compares what each supplier pays.
How does solar perform in Trowbridge in the winter months?
December is the weakest month in Trowbridge: about 220 kWh from 12 panels, against 800 kWh in July. The panels still generate on bright winter days; they just cover a smaller share of what the house uses.
How Trowbridge compares with its neighbours
The six closest towns we publish, run through the identical PVGIS query as Trowbridge.
| Town | kWh per kWp a year | vs Trowbridge |
|---|---|---|
| Trowbridge | 1,022 | this town |
| Bradford-on-Avon | 1,020 | −2 kWh |
| Westbury | 1,029 | +7 kWh |
| Melksham | 1,031 | +9 kWh |
| Corsham | 1,025 | +3 kWh |
| Frome | 1,008 | −14 kWh |
| Bath | 1,018 | −4 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 Trowbridge: Solar panels in Trowbridge 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.
Guides worth reading before your call
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 →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 →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 →Choosing a tariff when you have solar, a battery and an EV
Solar, battery and EV want different tariffs. How to work out which one to protect.
Read the guide →G98 or G99: which one applies, what the application involves, and how long it takes
The G98 line sits at 3.68kW per phase. Above it, your network operator has to say yes first.
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.