The Tesla Semi is an all-electric battery-powered Class 8 semi-truck by Tesla, Inc. Two concept vehicles were unveiled in November 2017. Production was originally planned to begin as early as 2019, with Tesla projecting manufacture of as many as 100,000 trucks per year by 2022. The Semi was first mentioned in the Tesla 2016 Master Plan. Tesla said at the time that they have a working prototype that uses 'a bunch' of Tesla Model 3 electric motors. As of April 2017, Jerome Guillen had been leading the Tesla Semi program. Guillen was once in charge of Freightliner's Cascadia Diesel-engine Class 8 semi, before joining Tesla to configure the Model S production line, but left the Semi program a year later to lead one of the Model 3 general assembly lines and subsequently became Tesla president of automotive in September 2018. The new lead for the Semi program had not been publicly announced as of late 2019.