Is there enough sun around Dorchester to make this work?

Modelled at 985 kWh per kWp a year for a shallow-pitched roof at this latitude, which puts a 500 kWp array at roughly 493,000 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 Dorchester?

Only Scottish and Southern Electricity 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 Dorset?

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 Dorset either way.

Has anyone near DT1 already done this?

The planning database records 0 ground mounted and 5 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 Dorchester

Most holdings around Dorchester already own the best generating site they will ever have, and it is the roof of the shed they built for something else. Each survey records the sheet type and condition, the usable area once rooflights and vents come out, and whether the supply is single or three phase.

985 kWh per kWp a year at this latitude, so a 500 kWp array models at about 493,000 kWh. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.

Book a roof survey in Dorchester

Drawing Dorchester unit

Roof 96 x 62 m

Array 500 kWp

Yield 493,000 kWh/yr

Scale 1:500 / Rev A / DT1

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

Dorchester / Dorset

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

Farm building solar PV across Dorset

What a farm roof near Dorchester generates

Modelled irradiation at this latitude is 1258 kWh per square metre a year in the plane of a shallow-pitched roof, which works out at 985 kWh for every kWp installed (EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss). That is around 11 percent above the mean across the areas we cover, which is as strong as UK farm rooftop gets outside the south coast.

5 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 Dorchester is higher than the record shows.

We survey holdings across the DT postcode area, starting from DT1.

Dorset 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 Dorchester 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 493,000 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	27	13,500
Feb	43	21,500
Mar	80	40,000
Apr	115	57,500
May	133	66,500
Jun	135	67,500
Jul	136	68,000
Aug	115	57,500
Sep	88	44,000
Oct	53	26,500
Nov	33	16,500
Dec	23	11,500

Source: EU PVGIS v5.2

FIG. 2 Dorchester against the rest of Dorset

Weymouth1006
Dorchester985
Christchurch981
Bournemouth971
Bridport971
Poole965
Wimborne964
Sherborne924

Dorchester ranks 2 of 8 towns we cover in Dorset on modelled yield, against a national mean of 886 kWh per kWp. The county runs from 924 to 1006, a spread of 82 kWh per kWp. On a 500 kWp array that is about 41,000 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 Scottish and Southern Electricity Networks

Scottish and Southern Electricity 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.

Across Dorset the planning database records 149 solar schemes totalling 1078 MW, of which 47 are operational (REPD Q1 2026).

Solar already consented near DT1

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
Dorchesters Corn Exchange - Solar Panels & Biomass Boiler	Dorchester Town Council	n/a	Roof	Under Construction
High East - Solar Panels	21st Century Homes	0.26 MW	Roof	Awaiting Construction
Prince Of Wales Road - Solar Photovoltaic Equipment	Solar South West Limited	0.2 MW	Roof	Awaiting Construction
Damers First School - Solar Panels	Solar Options for Schools Limited	0.19 MW	Roof	Awaiting Construction
Thomas Hardye School - Solar Panels	Solar Options for Schools Limited	0.59 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 Dorchester

Is there enough sun around Dorchester to make this work?: Modelled at 985 kWh per kWp a year for a shallow-pitched roof at this latitude, which puts a 500 kWp array at roughly 493,000 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 Dorchester?: Only Scottish and Southern Electricity 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 Dorset?: 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 Dorset either way.
Has anyone near DT1 already done this?: The planning database records 0 ground mounted and 5 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.

Nearby

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