Aiming to reduce its carbon footprint by 25% by 2015, it is hoped the panels will cut emissions by 600 tonnes per year.
The panels were provided by Trina Solar, who delivered 1.28MW of PV modules to Solar Advanced Systems for the completion of a series of projects by Greggs.
The entire project, from planning and design to module installation, was completed within six months.
Stephen Weldon, social responsibility manager at Greggs, said: “As a responsible business, we have a duty to manage our energy consumption by becoming more energy-efficient in our bakery and retail operations.
“The installation of PV panels on our bakery roofs provided the perfect opportunity to make use of a previously unused resource, take advantage of the government’s Feed-In Tariff scheme and generate carbon-neutral electricity for use in the bakeries, and, therefore, reduce the amount of fossil fuel we need to buy and consume.”
The panels used were Trina Solar’s 250W polycrystalline PC05A Honey modules, which deliver an efficiency of 16.2% and a power output of up to 265W.