Tesla strengthens Panasonic solar bond with cell and module collaboration Ian Clover & Christian Roselund 18 October 2016 0 The latest Tesla/Panasonic Gigafactory will begin production of cells and modules in 2017 at the firm's acquired Buffalo site in New York. SolarCity The latest Tesla/Panasonic Gigafactory will begin production of cells and modules in 2017 at the firm’s acquired Buffalo site in New York.