Self-storage solar is viable but requires calibrated expectations. Lower electricity consumption than distribution or cold chain (50-200 kW for most facilities) produces 6-8 year paybacks in standard configuration. Three factors improve the economics significantly: EV customer charging, climate-controlled HVAC expansion, and multi-site portfolio efficiency.
The baseline economics
200 kW PV on a 10,000 sqm single-storey self-storage: Annual generation 190,000 kWh. Self-consumption 65%: £29,640 avoided import + £6,650 export = £36,290/year. At £240,000 installed: 6.6 year payback. After-tax AIA: 5.1 years.
EV customer charging: the best uplift
Customers visiting units (10:00-17:00) drive during peak PV window. 4 × 22 kW customer charge points: 88 kW additional solar absorption potential during day. Improves self-consumption from 65% to 82%: annual value increases from £36,290 to £50,000+. Payback improves by approximately 1 year. OZEV Workplace Charging Scheme: £350/socket grant (14 sockets = £4,900).
Climate-controlled HVAC uplift
Major operators expanding climate-controlled units: Safestore, Big Yellow, Shurgard all adding temperature-regulated storage. Each 1,000 sqm of climate control adds 30-60 kW HVAC load — improving self-consumption from 65% to 75-80%. Worth £2,500-£4,000/year additional saving per 1,000 sqm added.
Major operator sustainability programmes
Safestore (net zero 2030), Big Yellow (ESG programme), Shurgard (European sustainability framework): all require Scope 2 reduction and verified renewable energy reporting. Our audit pack satisfies all operator sustainability programmes.
See more
Self-storage solar guide: /guides/warehouse-solar-self-storage/. Solar with EV charging: /warehouse-solar-ev-charging/. Contact: /contact/.