Exeter's South West irradiance (970-1,010 kWh/kWp/yr) gives it a structural generation advantage over Midlands and Northern equivalents. The Sowton Industrial Estate (M5 J29) is the South West's most active commercial solar zone outside Plymouth, with WPD's reliable G99 connections and Devon's strong net zero planning framework.
Sowton — the Exeter commercial solar core
Sainsbury's Exeter DC (large-format, Tesco Net Zero programme context), Co-op regional warehouse, Travis Perkins and BSS distribution — all at Sowton (EX2, M5 J29). Self-consumption logistics: 79-83%. WPD EX2 G99: 5-7 months. Payback: 4-5 years. Marsh Barton trading estate (EX2): 500+ businesses, mixed commercial and motor trade, 100-500 kW per unit.
South West irradiance — the numbers
970-1,010 kWh/kWp/yr vs Birmingham 940-970: approximately 3-7% more generation annually. Over 25 years: £120k-£275k additional NPV per MW. Permanent structural advantage that compounds with tariff escalation.
Devon net zero planning support
Exeter City Council Net Zero 2030 target. Devon County Council Climate Emergency Declaration 2019. Commercial solar PV receives active planning support in EX postcodes — generally Permitted Development at Sowton and Marsh Barton without additional planning consent required.
See more
Exeter warehouse solar guide: /guides/warehouse-solar-exeter/. South West regional guide: /guides/warehouse-solar-south-west/. Contact: /contact/.