Surrey
Solar panels in Lambeth, designed on a free call.
A 12-panel roof in Lambeth makes about 6,540 kWh a year and costs £6,360 installed; a free 30-minute video call sizes it to yours.
Get my free quote
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 Lambeth roof makes, month by month
Lambeth's best month is July, at 126.4 kWh per kWp; December manages 37.3. Over the year that comes to 1,028 kWh per kWp, level with our Surrey county estimate.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 39.8 |
| February | 52.6 |
| March | 87.7 |
| April | 115 |
| May | 122 |
| June | 123 |
| July | 126 |
| August | 112 |
| September | 96.5 |
| October | 67.9 |
| November | 47.1 |
| December | 37.3 |
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: Lambeth makes 1,028 kWh per kWp a year, and the mean of our 85 county PVGIS estimates (our GB average) is 925, so Lambeth is 11% above it.
How Lambeth compares
Lambeth is one of 47 Surrey towns we track, and it ranks joint 14th of 47 for solar yield. The House of Commons Library settlement classification puts it in the core city class, with a population of 316,342, which makes it one of the largest places we publish figures for. Scale changes nothing about the physics: PVGIS gives a roof here 1,028 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 £672.
These are starting numbers, not a quote. The calculator below opens on Lambeth'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.
Lambeth 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 Lambeth's own coordinates (51.45339, -0.11841), 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.
UK Power Networks and your Lambeth connection
Lambeth is served by UK Power Networks: the town's centre falls inside its London licence area on NESO's boundary map.
What decides the paperwork is the inverter and battery output, not the number of panels. Up to 3.68kW per phase, a system follows G98: UK Power Networks is notified within 28 days of commissioning and nothing has to be approved first.
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.
Adding a heat pump or an EV charger in Lambeth
A heat pump in Lambeth
Heating demand peaks when solar is weakest. In Lambeth, a 12-panel system makes about 240 kWh in December and 250 kWh in January, a fraction of its 800 kWh in July, which is why a heat pump here is costed on its tariff first.
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 Lambeth
Lambeth'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.
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).
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 Lambeth
If a system in Lambeth is underperforming, start with the guides below: repair benchmarks, service scope, and the inverter question.
Lambeth solar questions
How much energy would 12 solar panels make in Lambeth?
Lambeth averages 2.82 peak sun hours a day, which PVGIS turns into 1,028 kWh per kWp a year. On a 12-panel, 6.36 kWp roof that is about 6,540 kWh, 68% of it between April and September.
Is solar more expensive in Lambeth?
Prices on this site are the same everywhere: £1,000 per kWp installed, which puts a 12-panel system at £6,360 in Lambeth, and a Duracell Dura16 installed with solar at £4,450 on top. The local part is generation, about 6,540 kWh a year here, which is what drives payback.
Who is the network operator in Lambeth, 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 Lambeth?
On the 12p export scenario, a 12-panel system in Lambeth sends about 5,601 kWh a year to the grid, worth around £672. The export rates table compares what each supplier pays.
How does solar perform in Lambeth in the winter months?
December is the weakest month in Lambeth: 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 Lambeth compares with its neighbours
The six closest towns we publish, run through the identical PVGIS query as Lambeth.
| Town | kWh per kWp a year | vs Lambeth |
|---|---|---|
| Lambeth | 1,028 | this town |
| Southwark | 1,029 | +1 kWh |
| Wandsworth | 1,030 | +2 kWh |
| Lewisham | 1,026 | −2 kWh |
| City and County of the City of London | 1,026 | −2 kWh |
| Merton | 1,022 | −6 kWh |
| City of Westminster | 1,026 | −2 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 Lambeth: Solar panels in Lambeth 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.
Guides worth reading before your call
Sourced, dated and written by us. The same ground we cover on your free call.
Do solar panels need direct sunlight? Not really, and here is why
No. Solar cells respond to light hitting them, not to a clear line of sight to the sun.
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 →Do you need to replace your radiators for a heat pump?
Some change, most do not. The room by room arithmetic that decides which.
Read the guide →Choosing a tariff when you have solar, a battery and an EV
Solar, battery and EV want different tariffs. How to work out which one to protect.
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.