Office Solar Case Study
Bristol tech HQ — 420 kWp + workplace EV charging + battery
Bristol tech HQ — 420 kWp + workplace EV charging + battery
A Series-B software company occupying 6,800 sqm of Grade A office space at Bristol’s Temple Quarter wanted to support their newly-published SBTi 1.5°C target and differentiate engineering recruitment from London-based competitors. We designed a 420 kWp rooftop PV system, 200 kWh BESS, and 18 × 22 kW workplace EV chargers funded in part by OZEV Workplace Charging Scheme grants. Total project value £498k, structured on cash purchase with £124k of year-one AIA tax saving.
The numbers
| Metric | Value |
|---|---|
| System size | 420 kWp PV + 200 kWh battery + 18 × 22 kW EV chargers |
| Panel count | 780 |
| Annual generation | 386,000 kWh/year |
| Annual saving | £124,000/year (PV) + £41,000 (EV revenue) |
| Simple payback | 5.2 years |
| Annual CO₂ saved | 88 tonnes |
| EPC uplift | C → A (15-point gain) |
| Completion | Q3 2025 |
What the customer said
“The integrated solar + battery + workplace EV proposition won us three engineering hires in the first quarter — recruits explicitly cited workplace charging as a deciding factor.”
What this means for your office
The economics on this project aren’t unusual for a well-designed office solar install in 2026. What varies between buildings is the specific load shape, roof area, electrical infrastructure age, tenancy structure, and applicable grant or finance routes.
The fastest way to understand your specific economics is a free desk feasibility study. Send us half-hourly meter data and a roof plan, and we’ll model your building specifically within 7 working days.