Solar panels for warehouses in Slough
The economics of a Slough rooftop array turn on how much of the generation the occupier uses on site. Each survey records the cladding profile, the usable area once rooflights and plant are removed, and the export limit worth applying for.
903 kWh per kWp a year at this latitude, so a 500 kWp array models at about 452,000 kWh. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.
Book a roof survey in SloughIllustrative layout for a unit of this size. Your own figures come from the roof survey.
Warehouse rooftop solar across Berkshire
What a roof in Slough actually generates
Modelled irradiation at this latitude is 1160 kWh per square metre a year in the plane of a shallow-pitched roof, which works out at 903 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.
Distribution stock around Slough clusters on M4 J5, M4 J6 and A4, which is where the large single-let roofs are.
Most of the units we look at here sit in the SL postcode area.
Slough is the planning authority for most sites here, and the built-up area holds a population of about 166,855, the size that tends to be served by mid-box last-mile units rather than national hubs (ONS Census 2021 built-up areas).
Slough ranks 5 of 8 towns we cover in Berkshire on modelled yield, against a national mean of 886 kWh per kWp. The county runs from 891 to 910, a spread of 19 kWh per kWp. Within Berkshire that difference is small enough to ignore: where the building sits is not what decides this scheme, your consumption pattern is.
Solar already consented near SL1
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 |
|---|---|---|---|---|
| Galvin Road | Barclays Bank / Innogy (previously BELECTRIC Solar) | 1.6 MW | Roof | Abandoned |
| Twinches Lane - Solar photovoltaic | Orchard Street Investment Management LLP | 0.32 MW | Roof | Awaiting Construction |
| Unit 2a, Slough Retail Park - Solar Panels | Sofology Head Office | 0.19 MW | Roof | Awaiting Construction |
Grid connection through Scottish and Southern Electricity Networks
Scottish and Southern Electricity Networks operates the distribution network across Berkshire, 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 Berkshire the planning database records 83 solar schemes totalling 317 MW, of which 8 are operational (REPD Q1 2026).
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 Slough
- What would a 500 kWp array produce in Slough?
- Yes, and the number matters more than the sunshine. At 903 kWh per kWp a year, a 500 kWp array on a Slough roof models at around 452,000 kWh. What changes the answer is how much of that you use on site rather than export. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.
- Which network operator handles the connection in Slough?
- Applications go to Scottish and Southern Electricity Networks, who run the network across Berkshire. They decide the export limit, and we handle the G99 paperwork alongside the array design.
- What does Slough require for rooftop solar?
- Roof-mounted panels on a commercial building usually fall under permitted development, subject to the limits on projection above the roof plane and to the building not being listed or in a conservation area. We confirm the position with Slough before the design is finalised.
- Has anyone near SL1 already done this?
- The planning database records 3 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.