Investors are betting that small companies like Workhorse will help popularize electric commercial vehicles. And Tesla aims to extend its reach.
Mr. Musk said on Tuesday that he had moved to be near a new factory Tesla is building outside Austin.
A new agreement, supplying hydrogen fuel cell technology from General Motors, is less sweeping than the strategic partnership outlined in September.
General Motors says it will increase its investment and model offerings over the next five years “to expedite the transition to E.V.s.”