Overview

This project involved the delivery of a small but technically complex off-grid solar PV and battery storage system in the centre of London. Although modest in size, the urban location introduced significant logistical challenges, including road closures, restricted delivery windows, noise limitations, and crane access. Careful coordination with all stakeholders ensured the installation was completed smoothly with minimal disruption.

The Challenge

The client required a fully self-sufficient power supply with no connection to the electricity grid. The system had to be designed around the limited footprint of a central London rooftop and installed safely while complying with strict planning, access, and logistical constraints typical of a dense city environment.

The Solution

The off-grid system was supplied and installed using 10 JA Solar panels, delivering a total capacity of 3.4kWp, paired with a Fronius inverter and a non-penetrative ZinCo mounting system suitable for the roof build-up. A Tesla Powerwall 2 with Gateway was installed to provide battery storage, enabling overnight power supply and backup capability.

The system design focused on maximising on-site generation and storage efficiency. Access permits, lifting operations, and site logistics were carefully managed to overcome the challenges of working on a busy city-centre rooftop.

The Result

The completed off-grid system generates approximately 3.4MWh of renewable electricity each year, avoiding around 0.79 tonnes of CO₂ annually. It provides the client with a clean, quiet, and resilient power source, removing the need for diesel generators and demonstrating the viability of solar and battery storage in high-density urban locations.