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Solar panels for warehouses in Hounslow

A Hounslow warehouse roof sits idle through exactly the hours its occupier buys the most expensive electricity. We start with the covering and the structure, because a roof with five years left in it changes the answer entirely.

910 kWh per kWp a year at this latitude, so a 500 kWp array models at about 455,000 kWh. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.

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96 m phase 1
Drawing Hounslow unit
Roof 96 x 62 m
Array 500 kWp
Yield 455,000 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.

Hounslow / 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.

Logistics solar PV across Greater London

What a roof in Hounslow actually generates

Modelled irradiation at this latitude is 1169 kWh per square metre a year in the plane of a shallow-pitched roof, which works out at 910 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 Hounslow roof makes, month by month

What a Hounslow roof makes, month by month

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

050100Jan: 25 kWh per kWpJanFeb: 39 kWh per kWpFebMar: 73 kWh per kWpMarApr: 105 kWh per kWpAprMay: 120 kWh per kWpMayJun: 125 kWh per kWpJunJul: 126 kWh per kWpJul126 kWh Aug: 107 kWh per kWpAugSep: 83 kWh per kWpSepOct: 52 kWh per kWpOctNov: 31 kWh per kWpNovDec: 22 kWh per kWpDec

Jul produces 5.7 times what Dec does on the same roof. A 500 kWp array here models at about 455,000 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
Jan2512,500
Feb3919,500
Mar7336,500
Apr10552,500
May12060,000
Jun12562,500
Jul12663,000
Aug10753,500
Sep8341,500
Oct5226,000
Nov3115,500
Dec2211,000
Source: EU PVGIS v5.2
FIG. 2 Hounslow against the rest of Greater London
  • Bexley916
  • Woolwich912
  • Fulham910
  • Hammersmith910
  • Hounslow910
  • Richmond910
  • Barking909
  • Ilford909
  • Battersea908

Hounslow ranks 7 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.

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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 Hounslow

How much does a warehouse roof in Hounslow generate?
The model gives 910 kWh for every kWp installed here, so 500 kWp comes out at about 455,000 kWh a year before any shading losses. You need roughly 1,485 sqm of clear roof to fit it. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.
Does the grid around Hounslow have capacity?
UK Power Networks is the distribution network operator for Greater London. Anything above 3.68 kW per phase connects under G99, and the application sets the export limit. We submit it as part of the design.

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