Is there enough sun around Borehamwood to make this work?

Modelled at 895 kWh per kWp a year for a shallow-pitched roof at this latitude, which puts a 500 kWp array at roughly 448,000 kWh a year before shading. That array needs about 1,485 sqm of clear roof once ridge vents and walkways are allowed for. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.

Who do we apply to for export near Borehamwood?

Only UK Power Networks can answer it for your connection, and on rural feeders the answer varies farm to farm. An export-limited offer usually still works, because a holding with grain drying, cooling or ventilation uses most of what it makes.

Do we need planning permission in Hertsmere?

In most cases no, because panels on the roof of an agricultural building usually sit within permitted development. The exceptions are listed buildings, conservation areas, protected landscapes and arrays that stand proud of the roof. We check with Hertsmere either way.

Has anyone near WD6 already done this?

The planning database records 0 ground mounted and 4 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.

Solar panels for farms in Borehamwood

Most holdings around Borehamwood already own the best generating site they will ever have, and it is the roof of the shed they built for something else. The survey starts on the covering: fibre cement or steel, its remaining life, the purlin spacing and what the frame will carry.

895 kWh per kWp a year at this latitude, so a 500 kWp array models at about 448,000 kWh. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.

Book a roof survey in Borehamwood

Drawing Borehamwood unit

Roof 96 x 62 m

Array 500 kWp

Yield 448,000 kWh/yr

Scale 1:500 / Rev A / WD6

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

Borehamwood / Hertfordshire

Eastern arable farmland with solar arrays on farm buildings — Industrial stock of the kind we survey across East of England.

Solar for agricultural buildings across Hertfordshire

What a farm roof near Borehamwood generates

Modelled irradiation at this latitude is 1150 kWh per square metre a year in the plane of a shallow-pitched roof, which works out at 895 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.

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

Surveys run across WD postcodes, WD6 outward.

Hertsmere 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 Borehamwood roof makes, month by month

Jul produces 5.9 times what Dec does on the same roof. A 500 kWp array here models at about 448,000 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

Month	kWh per kWp	500 kWp array
Jan	25	12,500
Feb	39	19,500
Mar	73	36,500
Apr	103	51,500
May	118	59,000
Jun	123	61,500
Jul	124	62,000
Aug	105	52,500
Sep	82	41,000
Oct	51	25,500
Nov	30	15,000
Dec	21	10,500

Source: EU PVGIS v5.2

FIG. 2 Borehamwood against the rest of Hertfordshire

Stevenage901
St Albans901
Hatfield901
Hertford901
Welwyn Garden City899
Watford898
Harpenden896
Hemel Hempstead895
Borehamwood895

Borehamwood ranks 10 of 10 towns we cover in Hertfordshire on modelled yield, against a national mean of 886 kWh per kWp. The county runs from 895 to 911, a spread of 16 kWh per kWp. Within Hertfordshire 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 UK Power Networks

Connections around Borehamwood 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 farm uses most of what the roof makes during the working day.

Across Hertfordshire the planning database records 119 solar schemes totalling 844 MW, of which 12 are operational (REPD Q1 2026).

Solar already consented near WD6

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
Unit 2, York Crescent - Solar Panels	Panattoni UK Developments Limited	0.22 MW	Roof	Awaiting Construction
Elstree Film And TV Studios, Shenley Road - Solar Panels And ASHPs	Hertsmere Borough Council	n/a	Roof	Application Withdrawn
Elstree Film And TV Studios, Shenley Road - Solar Panels	Sky Studios	3 MW	Roof	Operational
Centennial Park, Centennial Avenue - Solar Panels	Spire Healthcare Group PLC	0.17 MW	Roof	Awaiting Construction

Book the survey

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.

Questions about solar in Borehamwood

Is there enough sun around Borehamwood to make this work?: Modelled at 895 kWh per kWp a year for a shallow-pitched roof at this latitude, which puts a 500 kWp array at roughly 448,000 kWh a year before shading. That array needs about 1,485 sqm of clear roof once ridge vents and walkways are allowed for. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.
Who do we apply to for export near Borehamwood?: Only UK Power Networks can answer it for your connection, and on rural feeders the answer varies farm to farm. An export-limited offer usually still works, because a holding with grain drying, cooling or ventilation uses most of what it makes.
Do we need planning permission in Hertsmere?: In most cases no, because panels on the roof of an agricultural building usually sit within permitted development. The exceptions are listed buildings, conservation areas, protected landscapes and arrays that stand proud of the roof. We check with Hertsmere either way.
Has anyone near WD6 already done this?: The planning database records 0 ground mounted and 4 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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