Wiltshire
Solar panels in Swindon, sized to your roof.
Twelve panels (6.36 kWp) here make about 6,470 kWh a year for £6,360 installed, designed around your roof on a free 30-minute video call.
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- Priced before anyone visits
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What a roof in Swindon can generate
From 36.1 kWh per kWp in December to 125.3 in July: a roof in Swindon makes 3.5 times as much in its best month as in its darkest, and 1,018 kWh per kWp across the year.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 39.2 |
| February | 51.9 |
| March | 88.5 |
| April | 115 |
| May | 123 |
| June | 122 |
| July | 125 |
| August | 110 |
| September | 95.9 |
| October | 65.8 |
| November | 45.4 |
| December | 36.1 |
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 1,018, Swindon is 10% above it.
How Swindon compares
Swindon is classed as a city in the House of Commons Library settlement data, home to 191,392 people. It is one of 20 Wiltshire towns we track, and it ranks joint 14th of 20 for solar yield. Its 1,018 kWh per kWp a year works out at 2.79 peak sun hours a day, and running the standard 12 panel model here splits the return into £247 of savings from generation you use yourself and £665 of export income at 12p, with about 5,538 kWh a year going to the grid.
These are starting numbers, not a quote. The calculator below opens on Swindon'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.
Planning applications in Swindon go to its own council, and the House of Commons Library classes it as a city.
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 is modelled from PVGIS satellite data for Swindon's own coordinates (51.5684, -1.79044), using the same 26.32p/kWh import value and £1,000 per kWp installed pricing as every Clearline estimate; the methodology is on our help page.
Connecting solar to the Swindon network
The distribution network operator (DNO) for Swindon 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.
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.
Adding a heat pump or an EV charger in Swindon
A heat pump in Swindon
Solar and a heat pump pull in opposite directions through the year: Swindon's roofs make 1,100 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.
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 Swindon
A 12-panel roof in Swindon makes about 800 kWh in July. 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.
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 Swindon
Guidance is nationwide, so the benchmarks hold in Swindon: repair costs, service scope, and when the inverter is the real fault.
Swindon solar questions
What could a roof in Swindon generate?
PVGIS puts a roof in Swindon at 1,018 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 Swindon?
The price does not move by postcode. At £1,000 per kWp installed, 12 panels (6.36 kWp) come to £6,360 in Swindon before a battery. What Swindon 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 Swindon?
Usually not in advance. SSEN, the network operator for Swindon, 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 Swindon?
With typical use and no battery, a 12-panel system in Swindon exports about 5,538 kWh a year. At 12p per kWh that is roughly £665; 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 Swindon?
Yes, at a lower level. PVGIS gives Swindon 36.1 kWh per kWp in December and 39.2 in January, so a 12-panel system makes about 230 kWh and 250 kWh in those months, against 800 kWh in July. Winter output mostly covers daytime use rather than exporting.
How Swindon compares with its neighbours
How the towns nearest Swindon compare on the same PVGIS settings, closest first.
| Town | kWh per kWp a year | vs Swindon |
|---|---|---|
| Swindon | 1,018 | this town |
| Stratton St Margaret | 1,020 | +2 kWh |
| Wroughton | 1,019 | +1 kWh |
| Royal Wootton Bassett | 1,018 | level |
| Highworth | 1,018 | level |
| Faringdon | 1,030 | +12 kWh |
| Marlborough | 1,017 | −1 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 Swindon: Solar panels in Swindon from OVO Solar & Battery
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 Swindon homeowners
Sourced, dated and written by us. The same ground we cover on your free call.
Why solar panels stop working, and how to work out which one it is
There is an order to this, and it starts at the inverter display rather than the roof.
Read the guide →Adding a battery to solar panels you already own
Retrofitting a battery to working solar is straightforward. The paperwork is where people trip up.
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 →How an air source heat pump actually works
It moves heat rather than making it. The cycle, the efficiency numbers and the trade-offs.
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 →MCS, HIES, RECC, NAPIT, TrustMark and Flexi-Orb: which badge does what
Six logos, six different jobs. What each scheme covers, and which are actually required.
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.