Vale of Glamorgan commands the highest solar irradiance in Wales — 970-1,030 kWh/kWp/yr along the Bristol Channel coast — and Barry Docks Enterprise Zone offers enhanced capital allowances giving 100% first-year tax relief on solar PV. Distribution centres at Barry Docks (CF63) and the Cardiff Airport logistics corridor (Rhoose CF62) benefit from strong grid infrastructure and modern profiled steel roofing.
Local context — Vale of Glamorgan
Barry Docks Enterprise Zone hosts food manufacturing, cold chain and pharmaceutical logistics with high continuous electricity demand — achieving self-consumption ratios above 85% and paybacks of 4-5 years. The Cardiff Airport (Rhoose) logistics corridor is growing rapidly with e-commerce and pharmaceutical cargo operators on modern post-2010 units. WPD/NGED G99 connections: 5-8 months from the well-invested coastal substation network.
Modelled scenario — Vale of Glamorgan
A 750 kW solar PV install on a 180,000 sqft cold chain facility at Barry Docks Enterprise Zone. Coastal irradiance delivers 727,000-772,000 kWh/year. Continuous refrigeration operation achieves 91% self-consumption. Annual savings: £159,000-£191,000. EZ Enhanced Capital Allowances (100% FYA on full £600,000 capex at 25% corp tax = £150,000 year-one relief). Net effective cost after ECA: £450,000. Simple payback: 3.8-4.5 years.
Common questions — distribution centres in Vale of Glamorgan
Does Barry Docks Enterprise Zone status improve solar economics?
Yes significantly. Barry Docks EZ provides 100% Enhanced Capital Allowance on solar PV regardless of system size — giving full year-one tax relief on any scale project. Combined with 970-1,030 kWh/kWp/yr coastal irradiance, Barry Docks achieves the best commercial solar economics in Wales.
How long does WPD/NGED G99 take in the Vale of Glamorgan?
WPD/NGED typically completes Vale of Glamorgan G99 applications in 5-8 months. Barry Docks and Rhoose (Cardiff Airport) substations have good capacity from coastal grid investment. We submit G99 immediately after structural survey.