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Solar panels for farms in Hengrove

Around Hengrove the constraint is rarely the roof. It is the incoming supply and what the network will accept back. What decides a farm scheme here is the state of the roof sheets and the incoming supply, which is why the survey looks at both before anyone sizes an array.

903 kWh per kWp a year at this latitude, so a 500 kWp array models at about 452,000 kWh. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.

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96 m phase 1
Drawing Hengrove unit
Roof 96 x 62 m
Array 500 kWp
Yield 452,000 kWh/yr
Scale 1:500 / Rev A / Bristol

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

Hengrove / Bristol
A modern steel framed agricultural building with its roof covered in solar panels, tractor and trailer in the yard, fields beyond
Industrial stock of the kind we survey across Bristol.

Agricultural rooftop solar across Bristol

What a farm roof near Hengrove generates

Modelled irradiation at this latitude is 1154 kWh per square metre a year in the plane of a shallow-pitched roof, which works out at 903 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 areas we cover, so what decides the scheme is your own demand pattern rather than the latitude.

No solar scheme is recorded in this postcode district in the planning database. On a farm that usually means nothing has been built above the reporting threshold rather than that nothing has been built, because a roof array on a shed rarely appears in it.

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

What a Hengrove roof makes, month by month

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

050100Jan: 24 kWh per kWpJanFeb: 39 kWh per kWpFebMar: 73 kWh per kWpMarApr: 107 kWh per kWpAprMay: 123 kWh per kWpMayJun: 123 kWh per kWpJunJul: 126 kWh per kWpJul126 kWh Aug: 104 kWh per kWpAugSep: 83 kWh per kWpSepOct: 51 kWh per kWpOctNov: 29 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 452,000 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
Jan2412,000
Feb3919,500
Mar7336,500
Apr10753,500
May12361,500
Jun12361,500
Jul12663,000
Aug10452,000
Sep8341,500
Oct5125,500
Nov2914,500
Dec2110,500
Source: EU PVGIS v5.2
FIG. 2 Hengrove against the rest of Bristol
  • Bishopston908
  • Bedminster906
  • Hengrove903
  • Keynsham902
  • Filton895

Hengrove ranks 3 of 5 towns we cover in Bristol on modelled yield, against a national mean of 886 kWh per kWp. The county runs from 895 to 908, a spread of 13 kWh per kWp. Within Bristol 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 Bristol, 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.

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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 Hengrove

How much does a farm roof near Hengrove generate?
The model gives 903 kWh for every kWp installed here, so 500 kWp comes out at about 452,000 kWh a year before shading losses. A building of roughly 1,485 sqm of clear roof carries it. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.
Will the rural network around Hengrove take the export?
National Grid Electricity Distribution is the distribution network operator for Bristol. Anything above 3.68 kW per phase connects under G99, and the application sets the export limit. Rural supplies are often the binding constraint, so we ask the question before an array is sized.

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