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Solar panels for farms in Keynsham

A Keynsham farm buys electricity at the worst rate of the day in exactly the hours its roof could be generating. The survey starts on the covering: fibre cement or steel, its remaining life, the purlin spacing and what the frame will carry.

902 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 Keynsham unit
Roof 96 x 62 m
Array 500 kWp
Yield 451,000 kWh/yr
Scale 1:500 / Rev A / BS31

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

Keynsham / Bristol
South West pasture and farm buildings carrying rooftop solar
Industrial stock of the kind we survey across South West.

Solar for agricultural buildings across Bristol

What a farm roof near Keynsham 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 902 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.

The planning record lists 1 ground mounted solar scheme in this postcode district, which is a fair guide to how the local network has treated field arrays. The typical consented scheme in this district is about 24.5 MW. Source: Renewable Energy Planning Database, Q1 2026.

1 roof mounted scheme is on record nearby. Roof arrays under a megawatt frequently never reach that database at all, so the real number of farm roofs generating around Keynsham is higher than the record shows.

Surveys run across BS postcodes, BS31 outward.

Bath and North East Somerset is the planning authority for most holdings here, and it is the authority that decides whether an array on an agricultural building falls inside permitted development.

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

What a Keynsham 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: 74 kWh per kWpMarApr: 106 kWh per kWpAprMay: 121 kWh per kWpMayJun: 123 kWh per kWpJunJul: 126 kWh per kWpJul126 kWh Aug: 105 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 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
Jan2512,500
Feb3919,500
Mar7437,000
Apr10653,000
May12160,500
Jun12361,500
Jul12663,000
Aug10552,500
Sep8341,500
Oct5125,500
Nov2914,500
Dec2110,500
Source: EU PVGIS v5.2
FIG. 2 Keynsham against the rest of Bristol
  • Bishopston908
  • Bedminster906
  • Hengrove903
  • Keynsham902
  • Filton895

Keynsham ranks 4 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

Solar already consented near BS31

From the government's Renewable Energy Planning Database, Q1 2026. These are the schemes on record in this postcode district, which is a fair guide to how the local network has been treating export applications.

Scheme Operator Capacity Mounting Status
Wellsway School, Chandag Road - PV Arrays Bath & West Community Energy 0.15 MW Roof Awaiting Construction
Gypsy Lane, Burnett - Solar PV Arrays Conrad Energy (Developments) Limited 24.5 MW Ground Application Refused

Grid connection through National Grid Electricity Distribution

Connections around Keynsham are handled by National Grid Electricity Distribution, 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 farm uses most of what the roof makes during the working day.

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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 Keynsham

How much does a farm roof near Keynsham generate?
The model gives 902 kWh for every kWp installed here, so 500 kWp comes out at about 451,000 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 Keynsham 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.
Is planning permission needed for panels on a farm building near Keynsham?
Usually permitted development covers a roof array. Ground mounted arrays are a different question and are far more likely to need a full application. We put both to Bath and North East Somerset before design sign-off.
Has anyone near BS31 already done this?
The planning database records 1 ground mounted and 1 roof mounted solar schemes in this postcode district. That matters less as proof it works and more as evidence of how the local network has treated export applications. Roof arrays under a megawatt often never appear in the database, so the real figure is higher. Source: Renewable Energy Planning Database, Q1 2026.

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