Surrey
Solar panels in Wandsworth, designed on a free call.
Twelve panels (6.36 kWp) here make about 6,550 kWh a year for £6,360 installed, designed around your roof on a free 30-minute video call.
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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
How much a Wandsworth roof makes, month by month
From 37.1 kWh per kWp in December to 126.5 in July: a roof in Wandsworth makes 3.4 times as much in its best month as in its darkest, and 1,030 kWh per kWp across the year.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 40.1 |
| February | 52.5 |
| March | 88.7 |
| April | 116 |
| May | 123 |
| June | 123 |
| July | 127 |
| August | 111 |
| September | 97 |
| October | 68.4 |
| November | 47.2 |
| December | 37.1 |
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: Wandsworth makes 1,030 kWh per kWp a year, and the mean of our 85 county PVGIS estimates (our GB average) is 925, so Wandsworth is 11% above it.
How Wandsworth compares
Wandsworth is one of 47 Surrey towns we track, and it ranks joint 10th of 47 for solar yield. The House of Commons Library settlement classification puts it in the core city class, with a population of 335,328, which makes it one of the largest places we publish figures for. Scale changes nothing about the physics: PVGIS gives a roof here 1,030 kWh per kWp a year, 2.82 peak sun hours a day averaged across the seasons, and on the 12p scenario about £247 of the year one benefit comes from solar you use yourself, with export income adding £674.
Treat these as calibration rather than a quote. The calculator below runs the same model, opened on Wandsworth'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.
Wandsworth is its own local planning authority area, and its House of Commons Library settlement class is core 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 Wandsworth's own coordinates (51.45173, -0.18438), 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 Wandsworth
On NESO's licence-area map, Wandsworth is in London, which UK Power Networks operates. That makes UK Power Networks the network operator for any system fitted here.
Most home systems stay within 3.68kW per phase of inverter output, which puts them on G98, a notification to UK Power Networks within 28 days of switch-on. Panel count does not decide it; the inverter and any battery do.
Above that, G99 means applying before the work is booked. Ofgem's guaranteed standard for a low voltage generation connection quotation is 45 working days, with £80 paid for each working day late, and it binds UK Power Networks as it does every network operator.
Sources: NESO DNO licence areas (3 May 2024); Ofgem, Distributed Generation Standards Direction guidance, checked 27 September 2026. G98 vs G99, explained.
Heat pumps and EV charging in Wandsworth
A heat pump in Wandsworth
In December, the darkest month here, 12 panels in Wandsworth make about 240 kWh. That is when a heat pump runs hardest, so its running cost in Wandsworth comes down to the tariff and the flow temperature rather than the roof.
Grant support in England comes from the Boiler Upgrade Scheme: £7,500 for an air source or ground source heat pump, £2,500 for air-to-air, and an extra £1,500 until March 2027 where the home is heated by oil or LPG off the gas grid (gov.uk, checked 28 September 2026).
Charging an EV in Wandsworth
Wandsworth's July output, about 800 kWh from 12 panels, is several times the 70 kWh or so a typical home uses in daylight that month on our calculator's settings. Daytime charging turns that surplus into miles.
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.
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 Wandsworth
If a system in Wandsworth is underperforming, start with the guides below: repair benchmarks, service scope, and the inverter question.
Solar in Wandsworth: your questions answered
How much energy would 12 solar panels make in Wandsworth?
Wandsworth averages 2.82 peak sun hours a day, which PVGIS turns into 1,030 kWh per kWp a year. On a 12-panel, 6.36 kWp roof that is about 6,550 kWh, 68% of it between April and September.
Is solar more expensive in Wandsworth?
Prices on this site are the same everywhere: £1,000 per kWp installed, which puts a 12-panel system at £6,360 in Wandsworth, and a Duracell Dura16 installed with solar at £4,450 on top. The local part is generation, about 6,550 kWh a year here, which is what drives payback.
Who is the network operator in Wandsworth, and do I need a G99 application?
The operator is UK Power Networks. 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. Ofgem's guaranteed standard for a low voltage generation connection quotation is 45 working days, with £80 paid for each working day late, and it binds UK Power Networks as it does every network operator. Your design call checks which route yours needs.
What could I earn from exporting in Wandsworth?
On the 12p export scenario, a 12-panel system in Wandsworth sends about 5,614 kWh a year to the grid, worth around £674. The export rates table compares what each supplier pays.
How does solar perform in Wandsworth in the winter months?
December is the weakest month in Wandsworth: about 240 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 Wandsworth compares with its neighbours
How the towns nearest Wandsworth compare on the same PVGIS settings, closest first.
| Town | kWh per kWp a year | vs Wandsworth |
|---|---|---|
| Wandsworth | 1,030 | this town |
| Lambeth | 1,028 | −2 kWh |
| Merton | 1,022 | −8 kWh |
| Hammersmith and Fulham | 1,031 | +1 kWh |
| Kensington and Chelsea | 1,026 | −4 kWh |
| City of Westminster | 1,026 | −4 kWh |
| Southwark | 1,029 | −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 Wandsworth: Solar panels in Wandsworth 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 Wandsworth homeowners
Sourced, dated and written by us. The same ground we cover on your free call.
Aiko vs LONGi for a UK roof: Neostar 3 or Hi-MO X10?
Datasheet against datasheet, with a verdict by roof type and the warranty by series.
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 →What are the disadvantages of a heat pump? Six honest ones
Six real disadvantages, worth planning around rather than a reason to rule one out.
Read the guide →Why tariff choice moves payback more than kit choice
Identical kit, five times the export income. The tariff decision worked through with August 2026 rates.
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.