Solar panels for warehouses in Penzance
The economics of a Penzance 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.
979 kWh per kWp a year at this latitude, so a 500 kWp array models at about 490,000 kWh. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.
Book a roof survey in PenzanceIllustrative layout for a unit of this size. Your own figures come from the roof survey.
Warehouse rooftop solar across Cornwall
What a roof in Penzance actually generates
Modelled irradiation at this latitude is 1238 kWh per square metre a year in the plane of a shallow-pitched roof, which works out at 979 kWh for every kWp installed (EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss). That is around 10 percent above the mean across the towns we cover, which is as good as UK rooftop gets outside the south coast.
Most of the units we look at here sit in the TR postcode area.
Cornwall is the planning authority for most sites here, and the built-up area holds a population of about 14,960, so the stock here runs to trade counters, light industrial terraces and the occasional larger shed (ONS Census 2021 built-up areas).
Penzance ranks 1 of 8 towns we cover in Cornwall on modelled yield, against a national mean of 886 kWh per kWp. The county runs from 921 to 979, a spread of 58 kWh per kWp. On a 500 kWp array that is about 29,000 kWh a year between the strongest and weakest town in the county.
Solar already consented near TR18
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 |
|---|---|---|---|---|
| Lidl Foodstore - Solar Panels | Lidl Great Britain | 0.18 MW | Roof | Operational |
| WM Morrison Supermarkets, Long Rock - Solar Panels | Morrisons | 0.33 MW | Roof | Awaiting Construction |
Grid connection through National Grid Electricity Distribution
National Grid Electricity Distribution operates the distribution network across Cornwall, 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 Cornwall the planning database records 174 solar schemes totalling 1116 MW, of which 88 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 Penzance
- How much does a warehouse roof in Penzance generate?
- The model gives 979 kWh for every kWp installed here, so 500 kWp comes out at about 490,000 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 Penzance have capacity?
- National Grid Electricity Distribution is the distribution network operator for Cornwall. 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 Penzance unit?
- Usually permitted development covers it. We still put the question to Cornwall before design sign-off, and we tell you early if a full application is needed rather than discovering it late.
- Has anyone near TR18 already done this?
- The planning database records 2 solar schemes in this postcode district, 2 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.