Exeter and Devon host a growing distribution centre market anchored by: Marsh Barton Industrial Estate (Exeter's primary industrial estate — DHL Exeter, Royal Mail Exeter, Hermes South West hub); Exeter Airport logistics cluster (Kuehne+Nagel, TNT, DPD South West); and the emerging growth corridor along the A30/A38 serving Plymouth and Cornwall. South West irradiance (1,025-1,100 kWh/kWp/yr) makes Exeter DC solar exceptional — generating 8-12% more power per panel per year than equivalent Midlands installations.
Local context — Exeter
Exeter DC solar economics are driven by three factors: (1) Best irradiance of any major English DC location south of Bristol (1,025-1,100 kWh/kWp/yr); (2) WPD DNO with 5-8 month G99 for Exeter and Tiverton commercial sites; (3) Growing South West e-commerce market (substantial population in Devon, Cornwall, Somerset — all served from Exeter-area DCs). Self-consumption for standard DC operations: 78-84%. Devon County Council net zero 2030 commitment creates strong sustainability framework for solar adoption.
Recent install — Exeter
A 700 kW solar PV install on a Marsh Barton Industrial Estate distribution and logistics centre. First-year generation 714,000 kWh. Self-consumption 81%. Annual saving £143,000. WPD G99: 6 months. Simple payback 4.1 years; 25-year IRR 26%. South West irradiance advantage delivered 9% more generation than equivalent Midlands install.
Common questions — distribution centres in Exeter
Why is Exeter irradiance better than the Midlands for commercial solar?
Devon receives 1,025-1,100 kWh/kWp/yr versus 950-975 kWh/kWp/yr in the Midlands — approximately 8-12% more solar energy per year. This difference: a 700 kW Exeter install generates approximately 52,000 kWh more per year than an identical Sheffield install. At 23p/kWh self-consumption value: £11,960/year additional saving. Over 25 years: £300,000 NPV advantage from irradiance alone.