The Wilson Group is a commercial group based in Mitcham, South London. To reduce its operating costs and strengthen its environmental credentials, the group partnered with DES Renewable Energy to install a rooftop solar PV system with battery storage — generating clean electricity on site, lowering energy bills, and supporting its long-term sustainability goals.
Project overview
The Wilson Group commissioned DES Renewable Energy to install a 65.5 kWp solar PV system across its roof. The installation comprised 131 x 500 W DMEGC panels connected to a Sigenergy 50 kW inverter with 20 kW Sigenergy battery storage. The project aimed to reduce electricity costs, lower carbon emissions, and enhance long-term financial sustainability.
Project details
- Company: Wilson Group
- Location: 51 Willow Lane, Mitcham, CR4 4NA
- Solar system capacity: 65.5 kWp
- Estimated annual generation: 62,225 kWh
- Installation type: Rooftop solar panels with battery storage
- Project timeline: Delivered 2026, from survey to commissioning
The objectives
- Reduce electricity costs and dependence on grid energy
- Improve environmental sustainability by reducing the carbon footprint
- Achieve long-term operational savings and financial returns
- Demonstrate responsible energy practices to customers, staff and stakeholders
The solution: bespoke assessment and design
DES Renewable Energy conducted a comprehensive assessment of roof space, structural considerations, sun exposure and interlocking constraints to ensure optimal placement and system sizing. The system was designed with 131 x 500 W DMEGC panels, with power conversion handled by a Sigenergy 50 kW inverter paired with a 20 kW Sigenergy battery to maximise self-consumption. We ensured full compliance with building regulations, electrical standards and industry best practice, obtaining all necessary permits and approvals.
Installation and completion
The installation was carried out with minimal disruption to day-to-day site operations. Panels were securely mounted, connected to the inverter, and integrated with the existing electrical system, before comprehensive testing and commissioning verified the system’s performance, functionality and safety. From initial assessment to completed commissioning, DES Renewable Energy provided a turnkey solution.
The results
- Energy cost reduction: lower electricity bills and reduced reliance on grid energy.
- Environmental impact: an estimated 62,225 kWh of clean energy each year, saving an estimated 12.9 tonnes of CO2 annually.
- Financial returns: ongoing energy savings contribute to long-term financial sustainability.
- Public image: demonstrates responsible energy practices to customers, staff and stakeholders.
At a glance
- 131 x 500 W DMEGC panels
- 65.5 kWp total system capacity
- Sigenergy 50 kW inverter with 20 kW Sigenergy battery storage
- An estimated 62,225 kWh of clean energy generated per year
- An estimated 12.9 tonnes of CO2 saved every year
Our accreditations
DES Renewable Energy is MCS certified, guaranteeing our installations are designed, installed and commissioned to the highest standard using only MCS-certified products. We are also NAPIT certified to install and self-certify our electrical work, and we comply with the Renewable Energy Consumer Code (RECC).
Runs a business, club or community facility? See what solar could save you
Our MCS-certified team designs and installs commercial solar, battery storage and EV charging for businesses, clubs and community facilities across the UK. Start with a free, no-obligation business energy bill check: get your free bill check or explore commercial solar.
Download the full Wilson Group case study (PDF).
More recent commercial & community installations by DES
See more of our recent commercial and community solar projects: Nanaksar Gurdwara, Southall (25 kWp solar & battery), Peters & May, Eastleigh (110.67 kWp commercial solar & EV charging) and Leverstock Green FC, Hemel Hempstead (19.22 kWp solar & battery).