Is there enough sun in Gloucester for a commercial roof array?

Modelled at 870 kWh per kWp a year for a low-tilt array at this latitude, a 210 kWp system comes out at roughly 183,000 kWh a year before shading. It needs about 1,390 m² of flat roof once the edge strip, plant and walkways are kept clear. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.

Do we need planning permission for solar on a commercial building in Gloucester?

Usually not a full application. In England, panels on the roof of a non-domestic building are permitted development under Class J of Part 14 of the General Permitted Development Order, with no capacity cap since December 2023. Above 50 kW, which covers most commercial arrays, you must first apply to Gloucester for a determination on prior approval of the design and appearance, in particular glare on neighbouring land. On a flat roof panels may stand no more than 1 metre above the roof and must sit at least 1 metre from its edge, and listed buildings and scheduled monuments are excluded. See our planning permission guide for the detail.

Does solar help a Gloucester landlord meet MEES?

It can. A non-domestic EPC is an asset rating, and on-site generation counts in the calculation, so an array usually lifts the score. Let property in England and Wales must be EPC E or better today. The government's interim response of 18 June 2026 proposes EPC B, where cost effective, from 2031 for let buildings over 1,000 m², and drops the EPC C step once planned for 2027. How far solar moves a particular building depends on its fabric and services, which is why the EPC assessor models it before anything is fitted.

Which network operator handles the connection in Gloucester?

Capacity varies street by street and only National Grid Electricity Distribution can answer it for your connection. We ask early, because an export-limited offer changes the design rather than ending the scheme, and most commercial buildings use most of what they generate anyway.

Commercial building solar panels in Gloucester

A flat commercial roof in Gloucester is usually the largest surface a building owns and the one nobody is asked to manage. We check the covering and the lease together, because a roof with eight years of membrane left and a tenant with a break in three changes the answer.

870 kWh per kWp a year at this latitude, so a 210 kWp array models at about 183,000 kWh. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.

Book a roof survey in Gloucester

Drawing Gloucester commercial roof

Roof 60 x 32 m, 1,920 m²

Array 210 kWp, east-west

Yield 183,000 kWh/yr

Scale 1:400 / Rev A / GL4

Illustrative layout for a flat commercial roof of this size, with plant, shade and access kept clear. Your own figures come from the roof survey.

118,555: people in the Gloucester built-up area (ONS Census 2021)
1,080: office properties on the rating list in Gloucester (VOA, March 2025)
1,060: retail properties, 70 of them large-format (VOA, March 2025)
1: named commercial rooftop scheme on the planning record nearby (REPD, Q1 2026)

The commercial edge of a South West market town, with rooftop solar on several buildings — Commercial stock of the kind we survey across South West. Generated illustration, not a named site.

Solar PV for commercial property across Gloucestershire

What a flat roof in Gloucester generates

Modelled irradiation here is 1,116 kWh per square metre a year on a low-tilt array, which works out at 870 kWh for every kWp installed (EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss). That is within a few percent of the mean across the towns we cover, so the weather is not what decides the case here. Opening hours are.

Commercial stock in Gloucester

Gloucester has 1,080 office premises and 1,060 shops and other retail premises on the non-domestic rating list, according to the Valuation Office Agency. By office stock the district sits above the median of the 318 districts in England and Wales; by retail stock it sits below the median of the 318 districts in England and Wales.

The big roofs are in the 70 large-format retail units, superstores and retail warehouses in the district, about 183,000 square metres of floorspace under largely single storey roofs.

The same list carries 170 hotel, leisure and assembly properties in the district. Leisure centres and hotels run seven days a week, which puts weekend generation to use that an office would export.

Source: Valuation Office Agency, Non-domestic rating: business floorspace, 31 March 2025 (published December 2025), counts and floorspace by special category code and local authority district, England and Wales.

Commercial rooftop solar already planned near Gloucester

The Renewable Energy Planning Database records one roof-mounted scheme on supermarket and retail buildings in this postcode district. These are other organisations' projects, listed from the public record, not ours.

Scheme	Applicant	Type	Capacity	Status
Morrisons Supermarket, Glevum Way	Morrison	retail	n/a	Awaiting Construction

The built-up area holds about 118,555 people, large enough for a retail park or two and a cluster of office buildings (ONS Census 2021 built-up areas).

We arrange surveys across the GL postcode area, starting from GL4.

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

Jul produces 6.4 times what Dec does on the same roof. A 210 kWp array here models at about 183,000 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	210 kWp array
Jan	23	4,830
Feb	37	7,770
Mar	70	14,700
Apr	103	21,630
May	118	24,780
Jun	121	25,410
Jul	122	25,620
Aug	101	21,210
Sep	79	16,590
Oct	48	10,080
Nov	28	5,880
Dec	19	3,990

Source: EU PVGIS v5.2

FIG. 2 Gloucester against the rest of Gloucestershire

Lydney905
Cirencester892
Stroud887
Cheltenham879
Tewkesbury878
Gloucester870

Gloucester ranks 6 of 6 towns we cover in Gloucestershire on modelled yield, against a national mean of 886 kWh per kWp. The county runs from 870 to 905, a spread of 35 kWh per kWp. Within Gloucestershire 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

Connections around Gloucester 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 commercial building uses most of what the roof makes during the working day.

Across Gloucestershire the planning database records 207 solar schemes totalling 1592 MW, of which 39 are operational (REPD Q1 2026).

All solar on record near GL4

Every scheme in this postcode district in the government's Renewable Energy Planning Database, Q1 2026, ground and roof mounted, commercial or not. None of them is ours. Together they are a fair guide to how the local network has been treating export applications.

Scheme	Operator	Capacity	Mounting	Status
Gloucester Academy	Greenshaw Learning Trust	0.2 MW	Roof	Awaiting Construction
Brookthorpe Solar Farm	PS Renewables	8 MW	Ground	Awaiting Construction
Morrisons Supermarket, Glevum Way - Solar Panels	Morrison	n/a	Roof	Awaiting Construction
Tenpin Centre, Severn Barnwood Link Road - Solar Panels	Ivegate Limited	0.22 MW	Roof	Awaiting Construction
Unilever UK, Corinium Avenue - Solar Panels	Unilever UK	3.5 MW	Roof	Awaiting Construction
Unilever UK - Solar Panels	Unilever UK	0.19 MW	Roof	Awaiting Construction

Book the survey

Send us the postcode

Tell us where the building is, roughly how big the roof is, and whether you own it or lease it. 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.

Your name Company Email Phone Site postcode Building type Your interest in the building Roof area Annual electricity spend What are you looking at?

Anything we should know about the roof?

We pass your details to our MCS-certified installation partner so they can quote. Read the privacy notice.

Questions about solar in Gloucester

Is there enough sun in Gloucester for a commercial roof array?: Modelled at 870 kWh per kWp a year for a low-tilt array at this latitude, a 210 kWp system comes out at roughly 183,000 kWh a year before shading. It needs about 1,390 m² of flat roof once the edge strip, plant and walkways are kept clear. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.
Do we need planning permission for solar on a commercial building in Gloucester?: Usually not a full application. In England, panels on the roof of a non-domestic building are permitted development under Class J of Part 14 of the General Permitted Development Order, with no capacity cap since December 2023. Above 50 kW, which covers most commercial arrays, you must first apply to Gloucester for a determination on prior approval of the design and appearance, in particular glare on neighbouring land. On a flat roof panels may stand no more than 1 metre above the roof and must sit at least 1 metre from its edge, and listed buildings and scheduled monuments are excluded. See our planning permission guide for the detail.
Does solar help a Gloucester landlord meet MEES?: It can. A non-domestic EPC is an asset rating, and on-site generation counts in the calculation, so an array usually lifts the score. Let property in England and Wales must be EPC E or better today. The government's interim response of 18 June 2026 proposes EPC B, where cost effective, from 2031 for let buildings over 1,000 m², and drops the EPC C step once planned for 2027. How far solar moves a particular building depends on its fabric and services, which is why the EPC assessor models it before anything is fitted.
Which network operator handles the connection in Gloucester?: Capacity varies street by street and only National Grid Electricity Distribution can answer it for your connection. We ask early, because an export-limited offer changes the design rather than ending the scheme, and most commercial buildings use most of what they generate anyway.

Nearby

All Gloucestershire locations