Office Solar Case Study
Birmingham professional services HQ — 320 kWp + 180 kWh battery
Birmingham professional services HQ — 320 kWp + 180 kWh battery
A Birmingham-based accountancy firm with a 9,500 sqm owner-occupied HQ in the Colmore Row business district came to us with two requirements: hit EPC B before the next FRA-mandated EPC renewal cycle, and provide Scope 2 reporting documentation suitable for inclusion in their Big Four client supplier audit. Our team modelled the half-hourly meter data across the building’s two MPANs, designed a 320 kWp rooftop system with 180 kWh battery storage, and structured the install on a 7-year asset finance contract through Aldermore Bank.
The numbers
| Metric | Value |
|---|---|
| System size | 320 kWp + 180 kWh BESS |
| Panel count | 595 |
| Annual generation | 294,000 kWh/year |
| Annual saving | £102,000/year |
| Simple payback | 5.6 years |
| Annual CO₂ saved | 67 tonnes |
| EPC uplift | C → B (9-point gain) |
| Completion | Q4 2025 |
What the customer said
“The proposal modelled our half-hourly data, not generic kWh-per-sqm. Year-one performance came in 2% above forecast, payback now tracking 3 months ahead.”
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.