Project Overview
Genfit completed a 46.64 kWp rooftop Solar PV installation at Oak Lane Clinic in 2024 for our client, Central London Community Healthcare NHS Trust (CLCH).
The project involved the installation of 88 solar panels, supported by 44 SolarEdge power optimisers and a 33.3 kW inverter, creating an efficient rooftop renewable energy system designed to generate clean electricity directly on site.
The system is expected to produce approximately 41.76 MWh of usable solar energy each year, helping Oak Lane Clinic reduce its reliance on grid electricity while supporting CLCH’s wider sustainability and carbon reduction objectives.
The installation is estimated to save approximately 8.08 tonnes of CO₂ emissions annually, equivalent to planting around 371 trees each year, making effective use of the available roof space while reducing the environmental impact of the clinic’s electricity consumption.
Project Details
System Design & Technology
The installation utilises a SolarEdge PV system, selected for its advanced monitoring capabilities, module-level optimisation and enhanced safety features.
1 SolarEdge inverter and 44 power optimisers help maximise system performance across the 88-panel array.
Maximum achieved AC power of 33.3 kW, efficiently converting the electricity generated by the PV array into usable power for the clinic.
Advanced monitoring platform provides real-time performance data and detailed system insights, helping to identify any issues quickly.
Enhanced safety features include module-level monitoring and SolarEdge SafeDC™ functionality, reducing DC voltage to a safer level when required.
LONGi Solar, LR5-66HTH-530M
- High-Efficiency HPBC Technology: Helps maximise energy generation.
- Strong Low-Light Performance: Performs well in lower irradiance.
- Low Temperature Coefficient: Helps maintain output in warmer conditions.
- Positive Power Tolerance: Rated at 0 to +3%.
- Robust Construction: Tested for high wind and snow loads.
- 15-Year Product Warranty: Cover for materials and workmanship.
- 25-Year Power Warranty: Approx. 88.9% output at year 25.
- IP68 Junction Box: Designed for long-term outdoor reliability.
Module Specifications:
- Rated Power: 530 W
- Max Efficiency: 22.3%
- Weight: 26.0 kg
- Dimensions: 2094 × 1134 × 35 mm
- Cell Technology: Monocrystalline HPBC
SolarEdge SE33.3K Inverter × 1
- 33.3 kW Three-Phase Output: Designed for commercial Solar PV systems.
- High Efficiency: Maximum efficiency of around 98.3%.
- SolarEdge Optimiser Compatible: Enables module-level optimisation and monitoring.
- Advanced Monitoring: Provides real-time system performance data.
- Enhanced Safety: Includes SolarEdge safety and shutdown functionality.
- Flexible Communications: Supports Ethernet, RS485 and optional wireless connectivity.
- IP65 Rated: Suitable for indoor or outdoor installation.
- 12-Year Manufacturer’s Warranty: Extended warranty options available.
Specifications:
- Rated AC Output: 33.3 kW
- Maximum Efficiency: 98.3%
- Three-Phase Inverter
- Protection Rating: IP65
- Weight: Approx. 32 kg
- Dimensions: Approx. 540 × 315 × 260 mm
SolarEdge S1200 Power Optimiser
- Designed for Commercial PV: Suitable for high-power modules and larger rooftop systems.
- Module-Level Optimisation: Helps maximise energy generation from each panel pair.
- Reduces Mismatch Losses: Helps limit losses from shading, soiling and module variation.
- Module-Level Monitoring: Provides detailed performance visibility through SolarEdge monitoring.
- SafeDC™ Functionality: Reduces DC voltage to a safer level when the system is shut down.
- High Efficiency: Maximum efficiency of up to 99.5%.
- Flexible System Design: Supports longer strings and efficient use of available roof space.
- 25-Year Manufacturer’s Warranty: Designed for long-term system reliability.
Specifications:
- Rated Input Power: Up to 1,200 W
- Maximum Efficiency: 99.5%
- Dual-Module Optimiser: Supports two PV modules per optimiser
- Protection Rating: IP68
- Suitable for: Commercial SolarEdge inverter systems
Project Planning & Preparation
Delivering this 5.12 MWp solar installation required extensive planning, design coordination, and safety management while keeping the distribution centre fully operational throughout the 20-week build programme. Genfit acted as both Principal Contractor and Principal Designer under CDM regulations.
Planning & Safety
Site-specific installation planning
Coordination around clinic operations
Full RAMS and site controls
Safety Management
Safe roof access
Working-at-height controls
Ongoing site safety checks
Engineering
Structural and roof assessment
SolarEdge system design
Electrical and grid coordination
Delivery
Coordinated material deliveries
Minimal disruption to the clinic
Full testing and commissioning
Environmental Impact
- 8 Tonnes CO₂ Emissions Avoided
- 370 Equivalent Environmental Benefit
Installation & Description of Works
A 5.12 MWp rooftop solar PV system designed, installed and commissioned while the distribution centre remained fully operational. The system integrates with the site’s electrical infrastructure, monitoring platform and grid compliance controls.
Solar PV Array
88 LONGi Solar LR5-66HTH-530M modules installed across the available roof space to maximise on-site renewable energy generation.
Electrical Infrastructure
1 SolarEdge SE33.3K inverter and 44 S1200 power optimisers, with new DC/AC cabling integrated into the clinic’s existing electrical system.
Monitoring & Safety
SolarEdge monitoring provides real-time system performance and module-level visibility, alongside integrated SolarEdge safety features.
Testing & Compliance
The complete Solar PV system was fully tested, commissioned and handed over ready for operation.
We’re proud to have delivered this Solar PV installation at Oak Lane Clinic for Central London Community Healthcare NHS Trust. The project demonstrates how healthcare buildings can make effective use of available roof space to generate clean electricity, reduce reliance on the grid and support long-term carbon reduction goals. It’s been a pleasure working with CLCH and contributing to their continued investment in more sustainable healthcare facilities.
– Dave Houston
Director, Genfit
