Wiltshire
Solar panels in Calne, priced before anyone visits.
Twelve panels (6.36 kWp) here make about 6,440 kWh a year for £6,360 installed, designed around your roof on a free 30-minute video call.
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Sunlight in Calne, in numbers
Calne's best month is July, at 124.4 kWh per kWp; December manages 35.4. Over the year that comes to 1,013 kWh per kWp, 3% below our Wiltshire county estimate.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 38.9 |
| February | 52.2 |
| March | 88.3 |
| April | 115 |
| May | 123 |
| June | 121 |
| July | 124 |
| August | 110 |
| September | 95.1 |
| October | 64.8 |
| November | 44.8 |
| December | 35.4 |
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 1,013, Calne is 10% above it.
How Calne compares
Small towns rarely get published solar figures, so here are the numbers for Calne. It is one of 20 Wiltshire towns we track, and it ranks 19th of 20 for solar yield, a town of 20,249 people in the House of Commons Library settlement data. PVGIS gives its roofs 1,013 kWh per kWp a year, 2.77 peak sun hours a day averaged across the seasons, and the standard 12 panel model turns that into £908 of year one benefit, £247 of it from your own generation and £661 from export at 12p.
These are starting numbers, not a quote. The calculator below opens on Calne'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 Calne sits with Wiltshire, 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.
Generation is modelled from PVGIS satellite data for Calne's own coordinates (51.43946, -2.00009), 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.
The network operator for Calne
Calne 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.
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.
Adding a heat pump or an EV charger in Calne
A heat pump in Calne
Heating demand peaks when solar is weakest. In Calne, a 12-panel system makes about 230 kWh in December and 250 kWh in January, a fraction of its 790 kWh in July, which is why a heat pump here is costed on its tariff first.
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 Calne
Summer is where a car earns its place. In July, 12 panels in Calne make about 790 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.
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 Calne
The same sourced benchmarks apply in Calne as everywhere we cover: honest repair pricing and what a service should include.
Calne solar questions
How much electricity do solar panels make in Calne?
About 6,440 kWh a year from 12 panels (6.36 kWp), on PVGIS satellite data for Calne: 1,013 kWh per kWp, or 2.77 peak sun hours a day on average. July is the strongest month, at about 790 kWh.
What does a typical solar system cost in Calne?
Solar is priced at £1,000 per kWp installed wherever you live, so a 12-panel, 6.36 kWp system costs £6,360 in Calne, exactly as it would anywhere else, before any battery. Location changes what the system makes, not what it costs: here that is about 6,440 kWh a year. The final figure comes from your roof on the design call.
Which DNO covers Calne, and what does it need from me?
Scottish and Southern Electricity Networks (SSEN) covers Calne. 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 Calne?
Around £661 a year at 12p per kWh, for the roughly 5,506 kWh a 12-panel system in Calne 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 Calne get in December?
December is the low point: about 230 kWh from a 12-panel system in Calne, on PVGIS data, rising to 790 kWh in July. From November to February the same system makes about 1,090 kWh in total, which is why a battery charged off-peak does more of the work in winter.
How Calne compares with its neighbours
The six closest towns we publish, run through the identical PVGIS query as Calne.
| Town | kWh per kWp a year | vs Calne |
|---|---|---|
| Calne | 1,013 | this town |
| Chippenham | 1,009 | −4 kWh |
| Devizes | 1,025 | +12 kWh |
| Melksham | 1,031 | +18 kWh |
| Corsham | 1,025 | +12 kWh |
| Royal Wootton Bassett | 1,018 | +5 kWh |
| Wroughton | 1,019 | +6 kWh |
Same PVGIS v5.2 query for every town. Small differences are within year-to-year weather; more than about 30 kWh per kWp apart is geography.
Also for Calne: Solar panels in Calne from OVO Solar & Battery
Also near Calne
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Guides worth reading before your call
Sourced, dated and written by us. The same ground we cover on your free call.
Back contact solar panels, explained for a UK roof
What back contact changes on a roof, compared fairly with TOPCon, with the makers' own claims labelled.
Read the guide →Tesla Powerwall 3 vs Duracell Dura16: which fits your home?
The two packages we actually price, compared on the numbers that decide it.
Read the guide →Charging an EV from your own solar
Every surplus kWh is 3.6 to 5 miles. Whether that beats a 7p overnight rate is arithmetic.
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 →NAPIT, NICEIC and competent person schemes: who tells building control about your solar
Solar work is notifiable. A competent person scheme means your installation team notifies, not you.
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.