Is there enough sun in Epsom to make this work?

Modelled at 900 kWh per kWp a year for a shallow-pitched roof at this latitude, which puts a 500 kWp array at roughly 450,000 kWh a year before shading. That array needs about 1,485 sqm of clear roof once walkways and setbacks are allowed for. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.

Who do we apply to for export in Epsom?

Capacity varies street by street, and only UK Power Networks can answer it for your connection. We ask the question early, because an export-limited offer changes the design rather than killing the scheme.

Do we need planning permission in Epsom and Ewell?

In most cases no, because roof-mounted panels on commercial buildings sit within permitted development. The exceptions are listed buildings, conservation areas and arrays that stand proud of the roof plane. We check with Epsom and Ewell first either way.

Has anyone near KT18 already done this?

The planning database records 4 solar schemes in this postcode district, 4 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 Epsom

The economics of a Epsom rooftop array turn on how much of the generation the occupier uses on site. The survey measures the roof, not the postcode: cladding profile, purlin centres, remaining sheet life and the load the frame can take.

900 kWh per kWp a year at this latitude, so a 500 kWp array models at about 450,000 kWh. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.

Book a roof survey in Epsom

Drawing Epsom unit

Roof 96 x 62 m

Array 500 kWp

Yield 450,000 kWh/yr

Scale 1:500 / Rev A / KT18

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

Epsom / Surrey

Home Counties distribution estate with solar arrays on several unit roofs — Industrial stock of the kind we survey across South East.

Warehouse rooftop solar across Surrey

What a roof in Epsom actually generates

Modelled irradiation at this latitude is 1155 kWh per square metre a year in the plane of a shallow-pitched roof, which works out at 900 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 towns we cover, so the case rests on your consumption pattern rather than on the weather.

Most of the units we look at here sit in the KT postcode area.

Epsom and Ewell is the planning authority for most sites here, and the built-up area holds a population of about 35,850, 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 Epsom roof makes, month by month

Jun produces 6.0 times what Dec does on the same roof. A 500 kWp array here models at about 450,000 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	24	12,000
Feb	37	18,500
Mar	72	36,000
Apr	105	52,500
May	120	60,000
Jun	125	62,500
Jul	125	62,500
Aug	105	52,500
Sep	83	41,500
Oct	51	25,500
Nov	30	15,000
Dec	21	10,500

Source: EU PVGIS v5.2

FIG. 2 Epsom against the rest of Surrey

Dorking916
Leatherhead910
Guildford908
Woking905
Weybridge905
Farnham903
Staines903
Camberley900
Epsom900

Epsom ranks 10 of 10 towns we cover in Surrey on modelled yield, against a national mean of 886 kWh per kWp. The county runs from 900 to 916, a spread of 16 kWh per kWp. Within Surrey 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

Solar already consented near KT18

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
University for the Creative Arts , Ashley Road - GSHP, Battery & Solar Panels	University for the Creative Arts	0.35 MW	Roof	Revised
University For The Creative Arts, Ashley Road - Solar PV Panels	University for the Creative Arts	n/a	Roof	Awaiting Construction
Toyota Limited, Yew Tree Bottom Road - Solar Panels	Toyota GB PLC	0.25 MW	Roof	Revised
Toyota Limited, Yew Tree Bottom Road - Solar Panels	Toyota GB PLC	0.25 MW	Roof	Application Submitted

Grid connection through UK Power Networks

Connections around Epsom 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 warehouse uses most of what the roof makes during the working day.

Across Surrey the planning database records 74 solar schemes totalling 182 MW, of which 6 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 Epsom

Is there enough sun in Epsom to make this work?: Modelled at 900 kWh per kWp a year for a shallow-pitched roof at this latitude, which puts a 500 kWp array at roughly 450,000 kWh a year before shading. That array needs about 1,485 sqm of clear roof once walkways and setbacks are allowed for. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.
Who do we apply to for export in Epsom?: Capacity varies street by street, and only UK Power Networks can answer it for your connection. We ask the question early, because an export-limited offer changes the design rather than killing the scheme.
Do we need planning permission in Epsom and Ewell?: In most cases no, because roof-mounted panels on commercial buildings sit within permitted development. The exceptions are listed buildings, conservation areas and arrays that stand proud of the roof plane. We check with Epsom and Ewell first either way.
Has anyone near KT18 already done this?: The planning database records 4 solar schemes in this postcode district, 4 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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