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Solar panels for warehouses in Glastonbury

Most of the industrial stock around Glastonbury carries a large, shallow-pitched roof that was never asked to do anything. Each survey records the cladding profile, the usable area once rooflights and plant are removed, and the export limit worth applying for.

913 kWh per kWp a year at this latitude, so a 500 kWp array models at about 457,000 kWh. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.

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96 m phase 1
Drawing Glastonbury unit
Roof 96 x 62 m
Array 500 kWp
Yield 457,000 kWh/yr
Scale 1:500 / Rev A / Somerset

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

Glastonbury / Somerset
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 Somerset.

Distribution centre solar across Somerset

What a roof in Glastonbury 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 913 kWh for every kWp installed (EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss). That is around 3 percent above the mean across the towns we cover, which is as good as UK rooftop gets outside the south coast.

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

What a Glastonbury 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: 41 kWh per kWpFebMar: 76 kWh per kWpMarApr: 107 kWh per kWpAprMay: 124 kWh per kWpMayJun: 124 kWh per kWpJunJul: 126 kWh per kWpJul126 kWh Aug: 104 kWh per kWpAugSep: 83 kWh per kWpSepOct: 51 kWh per kWpOctNov: 31 kWh per kWpNovDec: 21 kWh per kWpDec

Jul produces 6.0 times what Dec does on the same roof. A 500 kWp array here models at about 457,000 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
Feb4120,500
Mar7638,000
Apr10753,500
May12462,000
Jun12462,000
Jul12663,000
Aug10452,000
Sep8341,500
Oct5125,500
Nov3115,500
Dec2110,500
Source: EU PVGIS v5.2
FIG. 2 Glastonbury against the rest of Somerset
  • Weston-super-Mare934
  • Bridgwater931
  • Yeovil923
  • Glastonbury913
  • Taunton911
  • Bath904
  • Wells899
  • Frome894

Glastonbury ranks 4 of 8 towns we cover in Somerset on modelled yield, against a national mean of 886 kWh per kWp. The county runs from 894 to 934, a spread of 40 kWh per kWp. Within Somerset that difference is small enough to ignore: where the building sits is not what decides this scheme, your consumption pattern is.

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 National Grid Electricity Distribution

National Grid Electricity Distribution operates the distribution network across Somerset, so the export application goes to them. Anything larger than 3.68 kW per phase falls under G99, which means an application before commissioning rather than a notification afterwards. A constrained network is not the end of a scheme. Capping export costs little when the building already absorbs most of what the roof produces.

Across Somerset the planning database records 223 solar schemes totalling 1574 MW, of which 79 are operational (REPD Q1 2026).

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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.

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Questions about solar in Glastonbury

How much does a warehouse roof in Glastonbury generate?
The model gives 913 kWh for every kWp installed here, so 500 kWp comes out at about 457,000 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 Glastonbury have capacity?
National Grid Electricity Distribution is the distribution network operator for Somerset. 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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