How much does a warehouse roof in Weymouth generate?

The model gives 1006 kWh for every kWp installed here, so 500 kWp comes out at about 503,000 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 Weymouth have capacity?

Scottish and Southern Electricity Networks is the distribution network operator for Dorset. 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.

Is planning permission needed for panels on a Weymouth unit?

Usually permitted development covers it. We still put the question to Dorset before design sign-off, and we tell you early if a full application is needed rather than discovering it late.

Has anyone near DT3 already done this?

The planning database records 6 solar schemes in this postcode district, 3 of them roof mounted. That matters less as proof that it works and more as evidence of how the local network has been treating export applications. Source: Renewable Energy Planning Database, Q1 2026.

Solar panels for warehouses in Weymouth

Most of the industrial stock around Weymouth 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.

1006 kWh per kWp a year at this latitude, so a 500 kWp array models at about 503,000 kWh. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.

Book a roof survey in Weymouth

Drawing Weymouth unit

Roof 96 x 62 m

Array 500 kWp

Yield 503,000 kWh/yr

Scale 1:500 / Rev A / DT3

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

Weymouth / Dorset

South West industrial estate on the edge of a market town, with rooftop solar — Industrial stock of the kind we survey across South West.

Distribution centre solar across Dorset

What a roof in Weymouth actually generates

Modelled irradiation at this latitude is 1289 kWh per square metre a year in the plane of a shallow-pitched roof, which works out at 1006 kWh for every kWp installed (EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss). That is around 14 percent above the mean across the towns we cover, which is as good as UK rooftop gets outside the south coast.

We survey across the DT postcode area, starting from DT3.

Dorset is the planning authority for most sites here, and the built-up area holds a population of about 55,535, so the stock here runs to trade counters, light industrial terraces and the occasional larger shed (ONS Census 2021 built-up areas).

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

Jul produces 6.2 times what Dec does on the same roof. A 500 kWp array here models at about 503,000 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	81	40,500
Apr	117	58,500
May	136	68,000
Jun	139	69,500
Jul	142	71,000
Aug	119	59,500
Sep	91	45,500
Oct	54	27,000
Nov	33	16,500
Dec	23	11,500

Source: EU PVGIS v5.2

FIG. 2 Weymouth against the rest of Dorset

Weymouth1006
Dorchester985
Christchurch981
Bournemouth971
Bridport971
Poole965
Wimborne964
Sherborne924

Weymouth ranks 1 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

Solar already consented near DT3

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
NOTTINGTON LANE SOLAR FARM	PS Renewables	5 MW	Ground	Operational
Land at Newlands Farm	British Solar Renewables	5 MW	Ground	Operational
Chickerell Road, Chickerell - Solar Photovoltaics (PV) Equipment	Dorset Council - Assets and Property	n/a	Roof	Operational
Morrisons Supermarket, Dorchester Road - Solar Panels	Morrisons	0.38 MW	Roof	Awaiting Construction
Seaview Holiday Park,Preston Road- Solar Photovoltaics Panels	Bourne Leisure Limited	0.2 MW	Roof	Awaiting Construction
Waterside Holiday Park, Bowleaze Coveway - Solar Arrays	Waterside Holiday Group Ltd	n/a	Ground	Application Submitted

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).

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 Weymouth

How much does a warehouse roof in Weymouth generate?: The model gives 1006 kWh for every kWp installed here, so 500 kWp comes out at about 503,000 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 Weymouth have capacity?: Scottish and Southern Electricity Networks is the distribution network operator for Dorset. 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.
Is planning permission needed for panels on a Weymouth unit?: Usually permitted development covers it. We still put the question to Dorset before design sign-off, and we tell you early if a full application is needed rather than discovering it late.
Has anyone near DT3 already done this?: The planning database records 6 solar schemes in this postcode district, 3 of them roof mounted. That matters less as proof that it works and more as evidence of how the local network has been treating export applications. Source: Renewable Energy Planning Database, Q1 2026.

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