Middlesex
Solar panels in Ashford (Spelthorne), priced before anyone visits.
Twelve panels (6.36 kWp) here make about 6,510 kWh a year for £6,360 installed, designed around your roof on a free 30-minute video call.
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- Free 30-minute video design call
- Priced before anyone visits
- Installed by our MCS-certified, fully insured teams
How much a Ashford (Spelthorne) roof makes, month by month
Ashford (Spelthorne)'s best month is July, at 125.9 kWh per kWp; December manages 36.2. Over the year that comes to 1,024 kWh per kWp, level with our Middlesex county estimate.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 39.9 |
| February | 52.4 |
| March | 86.9 |
| April | 114 |
| May | 123 |
| June | 124 |
| July | 126 |
| August | 112 |
| September | 96.7 |
| October | 67.4 |
| November | 46.5 |
| December | 36.2 |
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: Ashford (Spelthorne) makes 1,024 kWh per kWp a year, and the mean of our 85 county PVGIS estimates (our GB average) is 925, so Ashford (Spelthorne) is 11% above it.
How Ashford (Spelthorne) compares
Small towns rarely get published solar figures, so here are the numbers for Ashford (Spelthorne). It is one of 23 Middlesex towns we track, and it ranks joint 15th of 23 for solar yield, a town of 24,497 people in the House of Commons Library settlement data. PVGIS gives its roofs 1,024 kWh per kWp a year, 2.81 peak sun hours a day averaged across the seasons, and the standard 12 panel model turns that into £916 of year one benefit, £247 of it from your own generation and £669 from export at 12p.
These are starting numbers, not a quote. The calculator below opens on Ashford (Spelthorne)'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 here go through Spelthorne; nationally, the House of Commons Library classes Ashford (Spelthorne) 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.
Modelled for Ashford (Spelthorne) at 51.43401, -0.46439 on PVGIS data, with imports valued at 26.32p/kWh and solar at £1,000 per kWp installed. Sources and assumptions: help page.
The network operator for Ashford (Spelthorne)
Ashford (Spelthorne) 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.
Below 3.68kW per phase of inverter and battery output, the G98 route applies: the installation is notified to SSEN within 28 days of commissioning, with no prior approval.
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 Ashford (Spelthorne)
A heat pump in Ashford (Spelthorne)
In December, the darkest month here, 12 panels in Ashford (Spelthorne) make about 230 kWh. That is when a heat pump runs hardest, so its running cost in Ashford (Spelthorne) comes down to the tariff and the flow temperature rather than the roof.
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 Ashford (Spelthorne)
Summer is where a car earns its place. In July, 12 panels in Ashford (Spelthorne) 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.
The calculator above includes a 7.4kW smart charger from £1,100 installed. Renters and flat owners with off-street parking can claim 75% of a chargepoint's cost, up to £500 per socket, until 31 March 2027 (gov.uk, checked 28 September 2026).
What the named kit costs, installed
Every system is designed around your roof on the free call before anything is fitted.
Solar panel servicing and repair in Ashford (Spelthorne)
If a system in Ashford (Spelthorne) is underperforming, start with the guides below: repair benchmarks, service scope, and the inverter question.
Common questions about solar in Ashford (Spelthorne)
How much energy would 12 solar panels make in Ashford (Spelthorne)?
Ashford (Spelthorne) averages 2.81 peak sun hours a day, which PVGIS turns into 1,024 kWh per kWp a year. On a 12-panel, 6.36 kWp roof that is about 6,510 kWh, 68% of it between April and September.
What does a typical solar system cost in Ashford (Spelthorne)?
Solar is priced at £1,000 per kWp installed wherever you live, so a 12-panel, 6.36 kWp system costs £6,360 in Ashford (Spelthorne), exactly as it would anywhere else, before any battery. Location changes what the system makes, not what it costs: here that is about 6,510 kWh a year. The final figure comes from your roof on the design call.
Who is the network operator in Ashford (Spelthorne), 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 happens to the solar I do not use in Ashford (Spelthorne)?
Around £669 a year at 12p per kWh, for the roughly 5,576 kWh a 12-panel system in Ashford (Spelthorne) exports with typical use. Rates vary by supplier and some need their own tariff; the export rates table is dated and sourced.
How does solar perform in Ashford (Spelthorne) in the winter months?
December is the weakest month in Ashford (Spelthorne): about 230 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 Ashford (Spelthorne) compares with its neighbours
How the towns nearest Ashford (Spelthorne) compare on the same PVGIS settings, closest first.
| Town | kWh per kWp a year | vs Ashford (Spelthorne) |
|---|---|---|
| Ashford (Spelthorne) | 1,024 | this town |
| Ashford Common | 1,024 | level |
| Stanwell | 1,026 | +2 kWh |
| Staines-upon-Thames | 1,024 | level |
| Sunbury-on-Thames | 1,024 | level |
| Egham | 1,024 | level |
| Chertsey | 1,025 | +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 Ashford (Spelthorne): Solar panels in Ashford (Spelthorne) from OVO Solar & Battery
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Reading for Ashford (Spelthorne) homeowners
Sourced, dated and written by us. The same ground we cover on your free call.
The 0% VAT deadline: what ends on 31 March 2027, and what it costs to miss it
The install deadline is still 31 March 2027. Electricity's 0% VAT was extended to the end of June.
Read the guide →What a battery gateway actually does
Without a gateway your system shuts down when the grid does. Here is what the box actually does.
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 →Which homes suit a heat pump, and which need work first
The trial data says no property type is unsuitable. Design quality decides the outcome.
Read the guide →The price cap explained, and what it does to solar payback
The cap limits unit rates, not bills. That changes what solar payback means.
Read the guide →Your MCS certificate: what it shows, when it arrives, and how a Smart Export Guarantee supplier uses it
The document your export payments hang on. Who issues it, what it shows, and how to get a copy.
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.