It looks like Workhorse will indeed use the 3 cylinder i3 REx engine/generator for the pickup
s (w-15) range extender. : https://www.trucks.com/2018/03/12/workh ... ric-truck/
Workhorse mentioned they were testing other (bigger) gas engine generators - I am kinda surprised they decided to stick with the i3 REx engine...I found it just barely covers slightly slower than average highway driving in Eco-Pro - I wouldn't think it would have enough output for a much heavier/larger pickup truck (it has two larger traction motors vs the single in the i3) that will be hauling around more cargo....For it to get 310 miles with the 40kwh available battery that will get 80 miles by itself (they will use a 60kwh passive cooled battery - but only allow 40kwh to be utilized) , unless the REx was set to start running at 90% battery and its Rev speed wasn't tied to speed of the vehicle...
Though I will say I am very interested in the power export option (7.2kw initially, but 14.4kw may be offered later) http://workhorse.com/pickup/ -- this could be a very interesting option to have during Hurricane/Severe Storm seasons where power could be knocked out for days....
Magazine snippet from their prototype:
http://workhorse.com/storage/app/media/ ... ne2017.pdf
http://workhorse.com/storage/app/media/ ... e_2017.pdf