Surrey
Solar panels in Southwark, sized to your roof.
About 6,540 kWh a year from 12 panels in Southwark, £6,360 installed, with your system designed 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
Southwark's solar year
PVGIS puts Southwark at 1,029 kWh per kWp a year, 1% above our Surrey county estimate. 68% of it arrives between April and September, peaking in July.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 39.4 |
| February | 52.6 |
| March | 88.1 |
| April | 115 |
| May | 122 |
| June | 123 |
| July | 126 |
| August | 112 |
| September | 96.5 |
| October | 68.3 |
| November | 47.2 |
| December | 37.5 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
For scale: 1,029 kWh per kWp in Southwark against 925, our GB average (the mean of our 85 county PVGIS estimates), which puts Southwark 11% above it.
How Southwark compares
Southwark is one of 47 Surrey towns we track, and it ranks joint 12th of 47 for solar yield. The House of Commons Library settlement classification puts it in the core city class, with a population of 314,195, which makes it one of the largest places we publish figures for. Scale changes nothing about the physics: PVGIS gives a roof here 1,029 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 £673.
Treat these as calibration rather than a quote. The calculator below runs the same model, opened on Southwark'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.
Planning applications in Southwark go to its own council, and the House of Commons Library classes it as a 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 Southwark's own coordinates (51.47498, -0.07542), 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.
Who runs the grid in Southwark
Southwark 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.
A bigger inverter or battery output needs a G99 application in advance. 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 Southwark
A heat pump in Southwark
A heat pump does most of its work from November to February. Over those four months, 12 panels in Southwark make about 1,120 kWh, against 3,080 kWh from May to August, so winter heating runs mostly on grid electricity and the tariff matters more than the roof.
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 Southwark
A 12-panel roof in Southwark 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.
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 Southwark
Faults, servicing and ageing inverters follow the same economics in Southwark as anywhere else, and the guides below price them plainly.
Solar in Southwark: your questions answered
What does a solar panel system produce in Southwark?
Each kWp of panels in Southwark makes 1,029 kWh a year on PVGIS figures, so a typical 12-panel system produces around 6,540 kWh, from about 240 kWh in December up to 800 kWh in July.
How much are solar panels in Southwark?
The price does not move by postcode. At £1,000 per kWp installed, 12 panels (6.36 kWp) come to £6,360 in Southwark before a battery. What Southwark changes is the return, about 6,540 kWh a year from that system, and your design call prices your actual roof.
Would a system in Southwark need approval from the network operator?
Southwark is on UK Power Networks' network (London licence area). Systems up to 3.68kW per phase of inverter output follow G98: UK Power Networks is notified within 28 days of commissioning, with no approval needed first. Anything larger needs a G99 application before installation. 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. Our G98 vs G99 guide explains both routes.
How much can I earn from exporting solar in Southwark?
With typical use and no battery, a 12-panel system in Southwark exports about 5,608 kWh a year. At 12p per kWh that is roughly £673; a supplier paying more, or a battery that keeps more for the evening, changes the figure. See the export rates table.
Is solar worth it in Southwark in winter?
It works, but the year is lopsided. 68% of a Southwark roof's output lands between April and September; the four months from November to February give about 1,120 kWh on a 12-panel system. Payback is worked out on the whole year, not the winter.
How Southwark compares with its neighbours
The six closest towns we publish, run through the identical PVGIS query as Southwark.
| Town | kWh per kWp a year | vs Southwark |
|---|---|---|
| Southwark | 1,029 | this town |
| Lambeth | 1,028 | −1 kWh |
| City and County of the City of London | 1,026 | −3 kWh |
| Lewisham | 1,026 | −3 kWh |
| Tower Hamlets | 1,023 | −6 kWh |
| City of Westminster | 1,026 | −3 kWh |
| Wandsworth | 1,030 | +1 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 Southwark: Solar panels in Southwark 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.
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 →Does a standalone battery actually pay back?
No panels means one job: buy cheap, use later. The tariff decides whether it pays.
Read the guide →Home EV charger types and speeds, explained properly
Granny cable, 7kW wall unit or 22kW three phase. What each adds per hour, and which you need.
Read the guide →Sizing a heat pump: what a proper survey covers
Sized by calculation, not by rule of thumb. What the survey covers, and what guessing costs.
Read the guide →Will energy prices keep rising, and by how much
The January forecasts jumped fast. What is confirmed, what is guessed, and whether solar is a real hedge.
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.