Project Overview
Location:
Kingston Hospital – Royal Eye Unit, Kingston upon Thames, KT2 7QB
Installation Date:
September 2025
System Type:
Healthcare facility rooftop solar PV system
Kingston Hospital has successfully implemented a large-scale solar photovoltaic system on the Royal Eye Unit, demonstrating how healthcare institutions can reduce operational costs while supporting environmental sustainability and energy security.
System Specifications:
Total PV Modules: 199 SunPower SPR-P7-500-BLK-P panels
Installed DC Capacity: 99.50 kWp
Maximum AC Power: 89.15 kW
Inverter: 1 x SolarEdge SE90K Synergy Manager
Power Optimizers: 102 x SolarEdge S1000 optimizers
Performance Metrics:
Annual Energy Production Total Annual Production: 94.28 MWh
Specific Production: 948 kWh/kWp
Performance Ratio: 86%
Energy Clipped: 0% (optimal sizing)
Energy Distribution:
Direct Building Consumption: 94.28 MWh (100% of production)
Grid Export: 0 MWh (complete self-consumption)
Solar Meeting Building Needs: 1.4% of total hospital consumption
Financial Benefits:
Immediate Cost Savings
Current Annual Bill: £1,362,086.20
Post-Solar Annual Bill: £1,341,380.09
Annual Savings: £20,706.12
Bill Offset: 1.52%
Long-term Financial Benefits:
System Cost: £196,000
Lifetime Bill Savings: £464,046
Net System Profit: £266,261
Total Projected Savings: £646,191 over 25 years
Environmental Impact:
Annual CO₂ Emissions Saved: 18.23 tonnes
Equivalent Trees Planted Annually: 837 trees
Levelized Cost of Energy: £0.119/kWh
Key Benefits:
For Healthcare Institutions
Operational Cost Reduction: Immediate reduction in electricity expenses
Budget Predictability: Protection against rising energy costs
Energy Security: On-site renewable generation for critical operations
Environmental Leadership: Supporting NHS sustainability commitments
Technical Features:
High-efficiency SunPower panels for maximum energy density
Complete self-consumption design optimized for hospital load profile
SolarEdge Synergy technology for enhanced performance monitoring
Firefighter gateway integration for emergency safety protocols
Conclusion:
The Kingston Hospital solar installation demonstrates how large healthcare institutions can successfully integrate renewable energy into their operations. With immediate annual savings of over £20,700 and substantial long-term savings exceeding £464,000, this project showcases how solar energy provides both financial sustainability and environmental leadership for healthcare organizations committed to reducing operational costs while supporting patient care.







