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Solar panels for warehouses in Wembley

Roof space is the one asset a Wembley 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.

901 kWh per kWp a year at this latitude, so a 500 kWp array models at about 451,000 kWh. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.

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96 m phase 1
Drawing Wembley unit
Roof 96 x 62 m
Array 500 kWp
Yield 451,000 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.

Wembley / 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 Wembley actually generates

Modelled irradiation at this latitude is 1159 kWh per square metre a year in the plane of a shallow-pitched roof, which works out at 901 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.

Distribution stock around Wembley clusters on North Circular A406 and A40, which is where the large single-let roofs are.

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

What a Wembley roof makes, month by month

Modelled output per kWp installed, for a shallow-pitched south-facing array. Source: EU PVGIS v5.2.

050100Jan: 26 kWh per kWpJanFeb: 39 kWh per kWpFebMar: 74 kWh per kWpMarApr: 104 kWh per kWpAprMay: 119 kWh per kWpMayJun: 123 kWh per kWpJunJul: 124 kWh per kWpJul124 kWh Aug: 105 kWh per kWpAugSep: 83 kWh per kWpSepOct: 52 kWh per kWpOctNov: 31 kWh per kWpNovDec: 22 kWh per kWpDec

Jul produces 5.6 times what Dec does on the same roof. A 500 kWp array here models at about 451,000 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
MonthkWh per kWp500 kWp array
Jan2613,000
Feb3919,500
Mar7437,000
Apr10452,000
May11959,500
Jun12361,500
Jul12462,000
Aug10552,500
Sep8341,500
Oct5226,000
Nov3115,500
Dec2211,000
Source: EU PVGIS v5.2
FIG. 2 Wembley against the rest of Greater London
  • Mayfair902
  • Merton902
  • Tottenham902
  • Westminster902
  • Wembley901
  • Hampstead900
  • Highgate900
  • Kentish Town900
  • Barnet899

Wembley ranks 42 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

Connections around Wembley are handled by UK Power Networks, which sets the export limit for the site. Above 3.68 kW per phase the connection runs under G99, so the export limit is agreed in advance rather than assumed. Where the local network is constrained, an export-limited connection usually still makes the scheme work, because a warehouse uses most of what the roof makes during the working day.

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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.

We pass your details to our MCS-certified installation partner so they can quote. Read the privacy notice.

Questions about solar in Wembley

Is there enough sun in Wembley to make this work?
Modelled at 901 kWh per kWp a year for a shallow-pitched roof at this latitude, which puts a 500 kWp array at roughly 451,000 kWh a year before shading. That array needs about 1,485 sqm of clear roof once walkways and setbacks are allowed for. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.
Who do we apply to for export in Wembley?
Capacity varies street by street, and only UK Power Networks can answer it for your connection. We ask the question early, because an export-limited offer changes the design rather than killing the scheme.

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