Swindon is the South West's strongest logistics solar market in 2026, anchored by the M4 J15-16 belt, Ocado's NDC, and a resilient Honda supply chain cluster despite the factory closure.
Swindon solar economics
Irradiance 1,000-1,030 kWh/kWp/yr. Grid retail 22p/kWh. WPD G99: 5-7 months SN postcodes. DC payback: 5-6yr. Cold chain: 4-5yr. Manufacturing IETF: 4-5yr.
M4 J15-16 logistics opportunity
Delta Business Park (SN5), Groundwell Industrial Estate (SN25), Cheney Manor (SN2). Ocado Swindon NDC: 800,000+ sqft, 1.5-4 MW system potential. Net zero corporate commitment driving Scope 3 supply chain requirements.
Honda supply chain IETF
Honda Swindon closed 2021 but tier-1/tier-2 suppliers remain in SN postcodes with qualifying automotive manufacturing processes at IETF 20-30%. Food manufacturing also well represented: Allied Bakeries (SN postcodes) IETF 20-25%.
WPD G99 process
WPD G99: 5-7 months SN postcodes. SN25 and SN5: good available capacity. For systems above 1 MW: pre-application engagement with WPD recommended. G99 submitted same-week as structural survey.
See more
Swindon guide: /guides/warehouse-solar-swindon/. WPD G99: /guides/warehouse-g99-dnno-connection/. Contact: /contact/.