Wiltshire, England
Solar panels across Wiltshire, designed on a free call.
A 12-panel roof in Wiltshire makes about 6,610 kWh a year and costs £6,360 installed; a free 30-minute video call sizes it to yours.
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
Sunlight in Wiltshire, in numbers
PVGIS puts Wiltshire at 1,039 kWh per kWp a year, 12% above the mean of our 85 county estimates. 67% of it arrives between April and September, peaking in May.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 40.8 |
| February | 54.9 |
| March | 92.7 |
| April | 118 |
| May | 126 |
| June | 123 |
| July | 125 |
| August | 112 |
| September | 97.2 |
| October | 66.4 |
| November | 46.9 |
| December | 36.8 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
For scale: 1,039 kWh per kWp in Wiltshire against 925, our GB average (the mean of our 85 county PVGIS estimates), which puts Wiltshire 12% above it.
How Wiltshire compares
Wiltshire ranks joint 7th of the 85 counties we track for solar yield, which puts export income near the top of the country. On the 12p scenario a 12 panel system here sends about 5,671 kWh to the grid a year on top of the £247 it saves you directly, so oversizing the array is usually the right call.
Treat these as calibration rather than a quote. The calculator below opens on Wiltshire's own PVGIS yield and prices a 12 panel system at £6,360 installed before any battery; your free design call reworks every number for your roof.
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 from PVGIS v5.2 (European Commission JRC, SARAH3), retrieved August 2026 for a representative point in Wiltshire (51.3147, -1.9298), 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.
SSEN and your Wiltshire connection
The centre of Wiltshire sits in Scottish and Southern Electricity Networks' Southern England licence area on NESO's boundary map, as does every town we cover there, so SSEN is the network operator (DNO) a system here is registered with.
Most home systems stay within 3.68kW per phase of inverter output, which puts them on G98, a notification to SSEN within 28 days of switch-on. Panel count does not decide it; the inverter and any battery do.
Larger systems go through G99 instead, applied for before installation. On timing: 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.
Heat pumps and EV charging in Wiltshire
A heat pump in Wiltshire
In December, the darkest month here, 12 panels in Wiltshire make about 230 kWh. That is when a heat pump runs hardest, so its running cost in Wiltshire comes down to the tariff and the flow temperature rather than the roof.
In England, the Boiler Upgrade Scheme pays £7,500 towards an air source or ground source heat pump and £2,500 towards an air-to-air one, with £1,500 more until March 2027 for homes heated by oil or LPG with no mains gas (gov.uk, checked 28 September 2026).
Charging an EV in Wiltshire
Summer is where a car earns its place. In May, 12 panels in Wiltshire make about 800 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 in Wiltshire: your questions answered
How much electricity do solar panels make in Wiltshire?
About 6,610 kWh a year from 12 panels (6.36 kWp), on PVGIS satellite data for Wiltshire: 1,039 kWh per kWp, or 2.85 peak sun hours a day on average. May is the strongest month, at about 800 kWh.
What does a typical solar system cost in Wiltshire?
Solar is priced at £1,000 per kWp installed wherever you live, so a 12-panel, 6.36 kWp system costs £6,360 in Wiltshire, exactly as it would anywhere else, before any battery. Location changes what the system makes, not what it costs: here that is about 6,610 kWh a year. The final figure comes from your roof on the design call.
Which DNO covers Wiltshire, and what does it need from me?
Scottish and Southern Electricity Networks (SSEN) covers Wiltshire. A home system of up to 3.68kW per phase is notified to SSEN within 28 days of commissioning under G98, and nothing waits on approval. Larger outputs need a G99 application before work starts. 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.
What happens to the solar I do not use in Wiltshire?
Around £681 a year at 12p per kWh, for the roughly 5,671 kWh a 12-panel system in Wiltshire 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 Wiltshire get in December?
December is the low point: about 230 kWh from a 12-panel system in Wiltshire, on PVGIS data, rising to 800 kWh in May. From November to February the same system makes about 1,140 kWh in total, which is why a battery charged off-peak does more of the work in winter.
Towns we cover in Wiltshire
20 Wiltshire towns have their own page, each with PVGIS figures, a network operator and a monthly curve for its own location.
Nearby in England
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.
Reading for Wiltshire homeowners
The same guidance we would talk through on your call, written down and sourced.
Do solar panels need direct sunlight? Not really, and here is why
No. Solar cells respond to light hitting them, not to a clear line of sight to the sun.
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 →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 →Heat pump running costs versus a gas boiler, assumptions shown
Four numbers decide it: seasonal efficiency, flow temperature, tariff and heat demand.
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 →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.