Cardiff has one of the most dynamic commercial property markets in South Wales, with thousands of offices, warehouses, retail parks and industrial units spread across the city centre, business parks and out-of-town estates. From modern office blocks in the city centre to large distribution warehouses near Cardiff Bay and the M4 corridor, the city offers exceptional opportunities for businesses to slash energy costs through rooftop solar.

Office buildings in Cardiff typically have high daytime electricity consumption from lighting, air conditioning, IT equipment and kitchen facilities. This aligns almost perfectly with solar generation hours, meaning offices can achieve very high self-consumption rates — often 60-80% of generated electricity used on-site. For a typical 20-40kW office system, this translates to annual savings of £8,000-£20,000 with payback in 5-7 years.

Warehouses and distribution centres are even better solar candidates. Large, flat, unshaded roofs offer ideal mounting surfaces, and the high electricity demand from lighting, conveyor systems, refrigeration and charging equipment means almost all generated solar is consumed on-site. A 100kW warehouse system in Cardiff can generate 90,000+ kWh per year and save £25,000+ annually on energy bills.

GL Solar has installed office and warehouse solar systems across Cardiff — from small professional offices in the city centre to 100,000 sq ft distribution facilities in the outskirts. We handle everything from structural roof surveys and DNO applications through to installation, commissioning and ongoing maintenance. With 0% VAT on commercial solar and enhanced capital allowances available, the financial case for Cardiff offices and warehouses has never been stronger.