5.40 kWp SolarEdge System with Battery Storage
Location: Cambridge
Installation date: January 2026
Project Overview
In January 2026, SolarTherm UK completed a bespoke flat roof solar installation in Cambridge, delivering a high performance renewable energy system tailored to maximise efficiency, space utilisation and long term financial returns.
Flat roof properties present unique opportunities for optimisation, and this system was carefully designed using a custom aluminium A-frame mounting solution to achieve the ideal panel angle and orientation for maximum solar generation.
System Specification
- System size: 5.40 kWp
- Solar panels: 12x Aiko N-Type ABC Neostar 450W panels
- Inverter: SolarEdge inverter with power optimisers
- Battery storage: Voltsmile W1 10.24kWh battery
- Mounting system: bespoke aluminium A-frame mounting kit
- Additional features: 2x EPS (Emergency Power Supply) sockets and a 7.2kW Project EV charger
The flat roof setup allows for optimal tilt angles, improving solar yield compared to many pitched roof installations where orientation is fixed. Combined with SolarEdge power optimisers, each panel performs independently, ensuring maximum efficiency across the system.
Flat Roof Installation Benefits
This project highlights the advantages of installing solar panels on a flat roof:
- Optimised panel angle: panels are mounted at the ideal tilt to maximise sunlight exposure.
- Flexible design layout: panels can be positioned for best performance rather than being restricted by roof pitch.
- Improved efficiency: greater control over orientation leads to higher energy yields.
- Minimal roof penetration: the A-frame system reduces the need for invasive fixings.
This approach ensures the system performs at peak efficiency all year round, even during lower sunlight months.
Performance to Date
Since installation, 561.86kWh of electricity has been generated by the system. Despite installation during winter, the system has already delivered strong early performance – demonstrating the effectiveness of both the panel technology and optimised flat roof design.
Financial Performance
- First year savings: £1,158
- 30 year projected savings: £93,387
- Payback period: 10 years
The combination of high efficiency panels, optimised mounting and battery storage results in excellent long term returns and reduced reliance on grid electricity.
Key Benefits
Energy Independence
The 10.24kWh battery and EPS sockets provide stored energy and backup power capability during outages.
Maximum System Efficiency
Flat roof optimisation combined with SolarEdge technology ensures consistent and maximised performance.
EV-Ready Home
The installed EV charger supports sustainable transport and future energy needs.
Bespoke Engineering
The custom aluminium A-frame mounting system ensures durability, correct weighting and optimal positioning without compromising the roof structure.
Conclusion
This Cambridge flat roof solar installation showcases how tailored system design can unlock superior performance and long term value. By leveraging flexible mounting, premium components and smart energy storage, SolarTherm UK has delivered a future proof renewable energy solution with outstanding financial returns.
