Greenfield Holdings was retained through RG Group Ltd, one of Sainsbury`s main contractors to source and deliver a solar system which was to be installed onto the roof at the Chingford Supermarket. The GHL team was made up of Active Technologies, who designed and manufactured the aluminum framing system for the arrays, Q Design Consultants that handled the electrical design and they also arranged the G59 submission to EDF and RoofTech which handled the installation of the frames and the photovoltaic panels. They also arranged the electrical engineers to wire the whole system together – Natural Watt and Energy ICT – who provided the energy monitoring equipment. The energy metre was supplied by Elsevier while the solar panels were provided by Romag Holdings Plc and the inverters were supplied by Fronius.