Thor's semi truck is just a conversion vehicle. I don't regard this as a serious effort, and there is no reason to believe any specs or performance data from the vehicle would have any relevance to a production truck.
I don't want to belittle the company. Every company starts small; that's how things work in the real world. I wish them success, but let's be realistic and recognize that about 90% of startups fail. Will Thor be one of the 10%? Well, let's hope so for their sake.
But I'm far more interested in a startup EV maker like Rivian (a wannabe EV automobile maker, not a truck maker), one which quietly works to create a prototype, and then buys an abandoned auto assembly plant, rather than one which tries to dazzle everyone with a slick video like this one from Thor; a video which obviously uses a lot of CGI (computer renders), rather than showing a real vehicle. Computer renders of trucks don't haul freight; only real trucks do. And trucking fleet buyers are not going to be dazzled by slick videos nor boastful claims from startups. They are only interested in real data on the costs vs. benefits of running such trucks.
If it's hard to enter the competitive market for EV passenger cars, I think it's even harder to enter the EV heavy freight truck market. Smith Electric Vehicles tried and failed (not with BEV semi tractors, but with slightly smaller BEV freight trucks); will Thor be any more successful? Again, let's hope so, but I think the odds are long against them.