Office Solar Case Study
Reading Thames Valley business park — 1.1 MWp portfolio install
Reading Thames Valley business park — 1.1 MWp portfolio install
A Reading Thames Valley business park landlord with four Grade A office buildings totalling 47,000 sqm wanted to address MEES 2030 compliance across the portfolio in a single procurement cycle. We delivered a unified design across all four buildings — 1.1 MWp rooftop PV, 480 kWh shared battery (located in central plant building), and 24 × 22 kW workplace EV chargers across surface car parks. Service-charge cost recovery structure approved by the four building tenant boards through landlord-led consultation.
The numbers
| Metric | Value |
|---|---|
| System size | 1,100 kWp PV + 480 kWh battery + 24 × 22 kW EV chargers |
| Panel count | 2040 |
| Annual generation | 1,012,000 kWh/year |
| Annual saving | £316,000/year (PV) + £58,000 (EV) |
| Simple payback | 5.4 years |
| Annual CO₂ saved | 230 tonnes |
| EPC uplift | C → A across 4 buildings (avg 11-point gain) |
| Completion | Q1 2026 |
What the customer said
“Portfolio-wide procurement across four buildings cut capex per kWp by 22% vs single-building tenders. The cross-building battery + EV optimisation was the unexpected economic win.”
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.