What would a 500 kWp array produce in Wandsworth?

Yes, and the number matters more than the sunshine. At 908 kWh per kWp a year, a 500 kWp array on a Wandsworth roof models at around 454,000 kWh. What changes the answer is how much of that you use on site rather than export. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.

Which network operator handles the connection in Wandsworth?

Applications go to UK Power Networks, who run the network across Greater London. They decide the export limit, and we handle the G99 paperwork alongside the array design.

Solar panels for warehouses in Wandsworth

Roof space is the one asset a Wandsworth unit already owns and rarely uses. What decides a scheme here is the state of the covering and the load path, which is why the survey starts on the roof rather than in a spreadsheet.

908 kWh per kWp a year at this latitude, so a 500 kWp array models at about 454,000 kWh. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.

Book a roof survey in Wandsworth

Drawing Wandsworth unit

Roof 96 x 62 m

Array 500 kWp

Yield 454,000 kWh/yr

Scale 1:500 / Rev A / Greater London

Illustrative layout for a unit of this size. Your own figures come from the roof survey.

Wandsworth / Greater London

Aerial view of an industrial estate where some warehouse roofs carry solar arrays and others are bare steel — Industrial stock of the kind we survey across Greater London.

Warehouse rooftop solar across Greater London

What a roof in Wandsworth actually generates

Modelled irradiation at this latitude is 1166 kWh per square metre a year in the plane of a shallow-pitched roof, which works out at 908 kWh for every kWp installed (EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss). That sits within a few percent of the mean across the towns we cover, so the case rests on your consumption pattern rather than on the weather.

FIG. 1 What a Wandsworth roof makes, month by month

Jul produces 5.7 times what Dec does on the same roof. A 500 kWp array here models at about 454,000 kWh across the year, but it arrives unevenly, which is why we size against your summer daytime load and then look at whether storage is worth adding for the shoulder months.

Monthly figures as a table

Month	kWh per kWp	500 kWp array
Jan	26	13,000
Feb	38	19,000
Mar	73	36,500
Apr	105	52,500
May	120	60,000
Jun	124	62,000
Jul	126	63,000
Aug	106	53,000
Sep	84	42,000
Oct	53	26,500
Nov	31	15,500
Dec	22	11,000

Source: EU PVGIS v5.2

FIG. 2 Wandsworth against the rest of Greater London

Battersea908
Bromley908
Chelsea908
Havering908
Wandsworth908
Bermondsey907
Brixton906
Clapham906
Notting Hill906

Wandsworth ranks 15 of 50 towns we cover in Greater London on modelled yield, against a national mean of 886 kWh per kWp. The county runs from 847 to 987, a spread of 140 kWh per kWp. On a 500 kWp array that is about 70,000 kWh a year between the strongest and weakest town in the county.

Bars are zero based, so length is proportional to the figure. Where a county is flat, that is the finding: location is not the lever, consumption is. Source: EU PVGIS v5.2, modelled per town

Grid connection through UK Power Networks

UK Power Networks is the network operator here, and their answer on export capacity shapes the design. Any commercial array above 3.68 kW per phase connects under G99 rather than G98, and the application fixes what you are allowed to push back onto the network. If the local network is tight, limiting export rarely breaks the case here: most of the generation is consumed on site while the building is working.

Book the survey

Send us the postcode

Tell us where the unit is and roughly how big the roof is. We come back with what it can carry, what it would generate against your consumption, and the three ways to pay for it.

Lenzie Consulting Ltd arranges the survey and passes your details to our MCS-certified installation partner so they can quote.

Questions about solar in Wandsworth

What would a 500 kWp array produce in Wandsworth?: Yes, and the number matters more than the sunshine. At 908 kWh per kWp a year, a 500 kWp array on a Wandsworth roof models at around 454,000 kWh. What changes the answer is how much of that you use on site rather than export. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.
Which network operator handles the connection in Wandsworth?: Applications go to UK Power Networks, who run the network across Greater London. They decide the export limit, and we handle the G99 paperwork alongside the array design.

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