File photo: A sign is seen outside the Tesla Inc. Gigafactory 2, which is also known as RiverBend, a joint venture with Panasonic to produce solar panels and roof tiles in Buffalo, New York, U.S., August 2, 2018. REUTERS/Brendan McDermid/File photo
File photo: A sign is seen outside the Tesla Inc. Gigafactory 2, which is also known as RiverBend, a joint venture with Panasonic to produce solar panels and roof tiles in Buffalo, New York, U.S., August 2, 2018. REUTERS/Brendan McDermid/File photo