Solar panels for warehouses in Eastleigh
The economics of a Eastleigh 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.
942 kWh per kWp a year at this latitude, so a 500 kWp array models at about 471,000 kWh. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.
Book a roof survey in EastleighIllustrative layout for a unit of this size. Your own figures come from the roof survey.
Warehouse rooftop solar across Hampshire
What a roof in Eastleigh actually generates
Modelled irradiation at this latitude is 1209 kWh per square metre a year in the plane of a shallow-pitched roof, which works out at 942 kWh for every kWp installed (EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss). That is around 6 percent above the mean across the towns we cover, which is as good as UK rooftop gets outside the south coast.
Distribution stock around Eastleigh clusters on M3 J13, M27 J5 and A335, which is where the large single-let roofs are.
Most of the units we look at here sit in the SO postcode area.
Eastleigh is the planning authority for most sites here, and the built-up area holds a population of about 48,360, so the stock here runs to trade counters, light industrial terraces and the occasional larger shed (ONS Census 2021 built-up areas).
Eastleigh ranks 4 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 SO50
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 |
|---|---|---|---|---|
| Eastleigh Energy Recovery Centre & Photovoltaic Solar Array - solar | Clean Power Properties | 1 MW | n/a | Abandoned |
| Lower Russells Field | Eastleigh Borough Council | 1 MW | n/a | Planning Permission Expired |
| Allington Lane - Solar & Battery Farm | Eastleigh Borough Council | 27 MW | Ground | Awaiting Construction |
Grid connection through Scottish and Southern Electricity Networks
Scottish and Southern Electricity Networks operates the distribution network across Hampshire, 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 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 Eastleigh
- Is there enough sun in Eastleigh to make this work?
- Modelled at 942 kWh per kWp a year for a shallow-pitched roof at this latitude, which puts a 500 kWp array at roughly 471,000 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 Eastleigh?
- Capacity varies street by street, and only Scottish and Southern Electricity 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 Eastleigh?
- 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 Eastleigh first either way.
- Has anyone near SO50 already done this?
- The planning database records 3 solar schemes in this postcode district. 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.