What would a 210 kWp array produce in Carlisle?

Yes. At 806 kWh per kWp a year, a 210 kWp array on a Carlisle roof models at around 169,000 kWh. What changes the answer is how much of that the building uses during opening hours rather than exports. 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 Cumberland?

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 Cumberland 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 Carlisle 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 Carlisle?

Capacity varies street by street and only Electricity North West 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 Carlisle

Commercial roofs in Carlisle tend to be flat, membrane covered and cluttered with plant, which shapes the layout more than the size does. What decides a scheme is the roof covering, the parapet height and the plant layout, which is why the survey happens on the roof rather than from a satellite image.

806 kWh per kWp a year at this latitude, so a 210 kWp array models at about 169,000 kWh. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.

Book a roof survey in Carlisle

Drawing Carlisle commercial roof

Roof 60 x 32 m, 1,920 m²

Array 210 kWp, east-west

Yield 169,000 kWh/yr

Scale 1:400 / Rev A / CA2

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.

77,730: people in the Carlisle built-up area (ONS Census 2021)
1,570: office properties on the rating list in Cumberland (VOA, March 2025)
2,560: retail properties, 100 of them large-format (VOA, March 2025)
0: named commercial rooftop schemes on the planning record nearby (REPD, Q1 2026)

The commercial edge of a North West town, offices and a retail park with solar on several roofs, Pennine hills beyond — Commercial stock of the kind we survey across North West. Generated illustration, not a named site.

Commercial rooftop solar across Cumbria

Yield on a Carlisle commercial roof

Modelled irradiation here is 1,027 kWh per square metre a year on a low-tilt array, which works out at 806 kWh for every kWp installed (EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss). That is about 9 percent below the mean across the towns we cover, so the case here rests more on daytime consumption than on raw generation.

How many commercial buildings Cumberland has

On the Valuation Office Agency's count, Cumberland holds 2,560 retail and 1,570 office properties on the rating list. By office stock the district sits in the top quarter of the 318 districts in England and Wales; by retail stock it sits in the top quarter of the 318 districts in England and Wales.

The big roofs are in the 100 large-format retail units, superstores and retail warehouses in the district, about 255,000 square metres of floorspace under largely single storey roofs.

The same list carries 740 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.

The built-up area holds about 77,730 people, so the stock here runs to high street premises, a supermarket or two and the odd hotel (ONS Census 2021 built-up areas).

We arrange surveys across the CA postcode area, starting from CA2.

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

May produces 8.6 times what Dec does on the same roof. A 210 kWp array here models at about 169,000 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	17	3,570
Feb	33	6,930
Mar	65	13,650
Apr	99	20,790
May	121	25,410
Jun	113	23,730
Jul	115	24,150
Aug	96	20,160
Sep	70	14,700
Oct	42	8,820
Nov	22	4,620
Dec	14	2,940

Source: EU PVGIS v5.2

FIG. 2 Carlisle against the rest of Cumbria

Barrow-in-Furness893
Whitehaven855
Workington835
Carlisle806
Penrith794
Kendal793

Carlisle ranks 4 of 6 towns we cover in Cumbria on modelled yield, against a national mean of 886 kWh per kWp. The county runs from 793 to 893, a spread of 100 kWh per kWp. On a 210 kWp commercial roof that is about 21,000 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 Electricity North West

Electricity North West operates the distribution network across Cumbria, so the export application goes to them. Anything larger than 3.68 kW per phase falls under G99, which means an application before commissioning rather than a notification afterwards. A constrained network is not the end of a scheme. Capping export costs little when the building already absorbs most of what the roof produces.

Across Cumbria the planning database records 86 solar schemes totalling 574 MW, of which 17 are operational (REPD Q1 2026).

All solar on record near CA2

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
Land between Orton Park Farm	INRG Solar	6.4 MW	Ground	Operational

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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?

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

Questions about solar in Carlisle

What would a 210 kWp array produce in Carlisle?: Yes. At 806 kWh per kWp a year, a 210 kWp array on a Carlisle roof models at around 169,000 kWh. What changes the answer is how much of that the building uses during opening hours rather than exports. 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 Cumberland?: 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 Cumberland 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 Carlisle 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 Carlisle?: Capacity varies street by street and only Electricity North West 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.

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