Wiltshire
Solar panels in Marlborough, sized to your roof.
A 12-panel roof in Marlborough makes about 6,470 kWh a year and costs £6,360 installed; a free 30-minute video call sizes it to yours.
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What a roof in Marlborough can generate
Marlborough's best month is May, at 123.9 kWh per kWp; December manages 35.6. Over the year that comes to 1,017 kWh per kWp, 2% below our Wiltshire county estimate.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 38.6 |
| February | 51.8 |
| March | 89.5 |
| April | 115 |
| May | 124 |
| June | 122 |
| July | 124 |
| August | 110 |
| September | 95.9 |
| October | 65.3 |
| November | 45.5 |
| December | 35.6 |
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: Marlborough makes 1,017 kWh per kWp a year, and the mean of our 85 county PVGIS estimates (our GB average) is 925, so Marlborough is 10% above it.
How Marlborough compares
Small towns rarely get published solar figures, so here are the numbers for Marlborough. It is one of 20 Wiltshire towns we track, and it ranks 18th of 20 for solar yield, a town of 8,817 people in the House of Commons Library settlement data. PVGIS gives its roofs 1,017 kWh per kWp a year, 2.79 peak sun hours a day averaged across the seasons, and the standard 12 panel model turns that into £911 of year one benefit, £247 of it from your own generation and £664 from export at 12p.
Treat these as calibration rather than a quote. The calculator below runs the same model, opened on Marlborough'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.
Marlborough sits within Wiltshire, its local planning authority, and the House of Commons Library classes it as a 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 Marlborough (51.41983, -1.73082), a 26.32p/kWh import price and £1,000 per kWp installed; see the help page for the full method.
Connecting solar to the Marlborough network
Marlborough sits in Scottish and Southern Electricity Networks' Southern England licence area, so SSEN is the network operator (DNO) any solar panels or battery here are registered with.
G98 is the simple route. If the inverter, plus any battery, stays at or under 3.68kW per phase, SSEN only has to be told within 28 days after the system is commissioned.
A bigger inverter or battery output needs a G99 application in advance. 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 Marlborough
A heat pump in Marlborough
Solar and a heat pump pull in opposite directions through the year: Marlborough's roofs make 1,090 kWh from November to February on a 12-panel system, and 3,050 kWh from May to August. The heating season leans on the grid, so off-peak rates do the heavy lifting.
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 Marlborough
A 12-panel roof in Marlborough makes about 790 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.
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.
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 Marlborough
Guidance is nationwide, so the benchmarks hold in Marlborough: repair costs, service scope, and when the inverter is the real fault.
Marlborough solar questions
What could a roof in Marlborough generate?
PVGIS puts a roof in Marlborough at 1,017 kWh per kWp a year, 2.79 peak sun hours a day averaged across the seasons. A 12-panel, 6.36 kWp system makes about 6,470 kWh a year, most of it between April and September.
How much are solar panels in Marlborough?
The price does not move by postcode. At £1,000 per kWp installed, 12 panels (6.36 kWp) come to £6,360 in Marlborough before a battery. What Marlborough changes is the return, about 6,470 kWh a year from that system, and your design call prices your actual roof.
Do I need permission from the DNO for solar in Marlborough?
Usually not in advance. SSEN, the network operator for Marlborough, only needs a G98 notification within 28 days of commissioning for systems up to 3.68kW per phase. Bigger inverter or battery outputs need G99 approval 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. "See our DNO explainer.
How much can I earn from exporting solar in Marlborough?
With typical use and no battery, a 12-panel system in Marlborough exports about 5,531 kWh a year. At 12p per kWh that is roughly £664; a supplier paying more, or a battery that keeps more for the evening, changes the figure. See the export rates table.
Do solar panels work in winter in Marlborough?
Yes, at a lower level. PVGIS gives Marlborough 35.6 kWh per kWp in December and 38.6 in January, so a 12-panel system makes about 230 kWh and 250 kWh in those months, against 790 kWh in May. Winter output mostly covers daytime use rather than exporting.
How Marlborough compares with its neighbours
How the towns nearest Marlborough compare on the same PVGIS settings, closest first.
| Town | kWh per kWp a year | vs Marlborough |
|---|---|---|
| Marlborough | 1,017 | this town |
| Wroughton | 1,019 | +2 kWh |
| Swindon | 1,018 | +1 kWh |
| Royal Wootton Bassett | 1,018 | +1 kWh |
| Stratton St Margaret | 1,020 | +3 kWh |
| Calne | 1,013 | −4 kWh |
| Devizes | 1,025 | +8 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 Marlborough: Solar panels in Marlborough 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.
Reading for Marlborough homeowners
Sourced, dated and written by us. The same ground we cover on your free call.
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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.