Office Solar Case Study
NHS Trust HQ — 580 kWp Salix PSDS-funded install
NHS Trust HQ — 580 kWp Salix PSDS-funded install
A North-West NHS Trust administrative HQ of 14,500 sqm was due for EPC renewal in 2027 with the existing 2017-issued “C” rating widely expected to slip to “D” or “E” under SAP 10.2 methodology. The Trust applied to Salix PSDS Phase 4 with our support, securing a 100% capex grant for solar PV, battery storage, and LED relighting as part of a wider decarbonisation programme. We designed the 580 kWp system to deliver the maximum EPC uplift achievable within the building’s structural capacity.
The numbers
| Metric | Value |
|---|---|
| System size | 580 kWp PV + 250 kWh battery |
| Panel count | 1075 |
| Annual generation | 534,000 kWh/year |
| Annual saving | £164,000/year |
| Simple payback | 0 years |
| Annual CO₂ saved | 122 tonnes |
| EPC uplift | D → B (12-point gain) |
| Completion | Q2 2025 |
What the customer said
“The 100% PSDS grant meant zero capex impact on our annual budget while delivering the Trust’s largest single Scope 2 emissions reduction in the operational decarbonisation roadmap.”
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.