Kent
Solar panels in Lewisham, sized to your roof.
About 6,530 kWh a year from 12 panels in Lewisham, £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
Lewisham's solar year
From 36.7 kWh per kWp in December to 126.8 in July: a roof in Lewisham makes 3.5 times as much in its best month as in its darkest, and 1,026 kWh per kWp across the year.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 37.9 |
| February | 51 |
| March | 87.1 |
| April | 116 |
| May | 123 |
| June | 124 |
| July | 127 |
| August | 113 |
| September | 97 |
| October | 67.4 |
| November | 46.1 |
| December | 36.7 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
For scale: 1,026 kWh per kWp in Lewisham against 925, our GB average (the mean of our 85 county PVGIS estimates), which puts Lewisham 11% above it.
How Lewisham compares
Lewisham is one of 44 Kent towns we track, and it ranks 43rd of 44 for solar yield. The House of Commons Library settlement classification puts it in the core city class, with a population of 301,505, which makes it one of the largest places we publish figures for. Scale changes nothing about the physics: PVGIS gives a roof here 1,026 kWh per kWp a year, 2.81 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 £671.
Treat these as calibration rather than a quote. The calculator below runs the same model, opened on Lewisham'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 Lewisham 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 Lewisham's own coordinates (51.44875, -0.02138), 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 Lewisham
Lewisham 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 Lewisham
A heat pump in Lewisham
A heat pump does most of its work from November to February. Over those four months, 12 panels in Lewisham make about 1,090 kWh, against 3,100 kWh from May to August, so winter heating runs mostly on grid electricity and the tariff matters more 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 Lewisham
A 12-panel roof in Lewisham makes about 810 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.
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).
Installed prices, the same in every town
Every system is designed around your roof on the free call before anything is fitted.
Solar panel servicing and repair in Lewisham
Faults, servicing and ageing inverters follow the same economics in Lewisham as anywhere else, and the guides below price them plainly.
Lewisham solar questions
What does a solar panel system produce in Lewisham?
Each kWp of panels in Lewisham makes 1,026 kWh a year on PVGIS figures, so a typical 12-panel system produces around 6,530 kWh, from about 230 kWh in December up to 810 kWh in July.
What would 12 solar panels cost in Lewisham?
£6,360 for 12 panels (6.36 kWp), the same as in every other place we cover, because solar is priced at £1,000 per kWp installed rather than by area. A battery adds its own installed price on top. Where Lewisham differs is output: about 6,530 kWh a year from that system.
Would a system in Lewisham need approval from the network operator?
Lewisham 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 would export pay on a system in Lewisham?
It is exported. With typical use and no battery, about 5,589 kWh of the 6,530 kWh a 12-panel system makes in Lewisham goes to the grid, around £671 a year at 12p. A battery keeps more of it for the evening; the export rates table shows what suppliers pay.
Is solar worth it in Lewisham in winter?
It works, but the year is lopsided. 68% of a Lewisham roof's output lands between April and September; the four months from November to February give about 1,090 kWh on a 12-panel system. Payback is worked out on the whole year, not the winter.
How Lewisham compares with its neighbours
The six closest towns we publish, run through the identical PVGIS query as Lewisham.
| Town | kWh per kWp a year | vs Lewisham |
|---|---|---|
| Lewisham | 1,026 | this town |
| Southwark | 1,029 | +3 kWh |
| Greenwich | 1,036 | +10 kWh |
| Lambeth | 1,028 | +2 kWh |
| Tower Hamlets | 1,023 | −3 kWh |
| Bromley | 1,023 | −3 kWh |
| City and County of the City of London | 1,026 | level |
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 Lewisham: Solar panels in Lewisham 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.
Solar panel grants and funding in 2026: what actually exists, and what is a sales pitch
No blanket grant exists, and the four supports that do exist are better than most of the adverts.
Read the guide →Inside a home battery: capacity, power and losses
Usable capacity, kW output, round trip losses and chemistry, in plain terms.
Read the guide →What it really costs to charge an EV at home versus in public
Home off-peak charging costs a fraction of the public price. The arithmetic, and the tariff it depends on.
Read the guide →Are air source heat pumps any good? What owners actually report
The UK's largest survey found 80% of heat pump owners satisfied, against 70% for gas boilers.
Read the guide →What the Smart Export Guarantee actually is
The scheme obliges suppliers to pay above zero, and leaves the rate to them.
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.