Solar panels for warehouses in Winchester
The economics of a Winchester 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.
917 kWh per kWp a year at this latitude, so a 500 kWp array models at about 459,000 kWh. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.
Book a roof survey in WinchesterIllustrative layout for a unit of this size. Your own figures come from the roof survey.
Warehouse rooftop solar across Hampshire
What a roof in Winchester actually generates
Modelled irradiation at this latitude is 1180 kWh per square metre a year in the plane of a shallow-pitched roof, which works out at 917 kWh for every kWp installed (EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss). That is around 3 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 SO postcode area.
Winchester is the planning authority for most sites here, and the built-up area holds a population of about 48,480, so the stock here runs to trade counters, light industrial terraces and the occasional larger shed (ONS Census 2021 built-up areas).
Winchester ranks 5 of 10 towns we cover in Hampshire on modelled yield, against a national mean of 886 kWh per kWp. The county runs from 903 to 987, a spread of 84 kWh per kWp. On a 500 kWp array that is about 42,000 kWh a year between the strongest and weakest town in the county.
Solar already consented near SO23
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 |
|---|---|---|---|---|
| Micheldever Tyres Winchester, Winnall Warehouse - Solar PV Panels | Micheldever Tyres Winchester | n/a | Roof | Awaiting Construction |
Grid connection through Scottish and Southern Electricity Networks
Scottish and Southern Electricity Networks is the network operator here, and their answer on export capacity shapes the design. Any commercial array above 3.68 kW per phase connects under G99 rather than G98, and the application fixes what you are allowed to push back onto the network. If the local network is tight, limiting export rarely breaks the case here: most of the generation is consumed on site while the building is working.
Across Hampshire the planning database records 237 solar schemes totalling 1634 MW, of which 51 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 Winchester
- What would a 500 kWp array produce in Winchester?
- Yes, and the number matters more than the sunshine. At 917 kWh per kWp a year, a 500 kWp array on a Winchester roof models at around 459,000 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 Winchester?
- Applications go to Scottish and Southern Electricity Networks, who run the network across Hampshire. They decide the export limit, and we handle the G99 paperwork alongside the array design.
- What does Winchester 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 Winchester before the design is finalised.