How would you propose to recharge a military EV on the battle front?
this seems... way off topic. But to answer your question -- it depends on what kind of battle front you are talking about. Its already normal to have generator walls to support energy needs. In a major push offensive the generators are not going to keep up, but do they need to?
I've gotten rusty on modern warfare mobility, but in a full scale battle, how quickly does a line actually advance? Its hard to conceive that a range of a few hundred miles would not be sufficient.
I think the market action aspect of all of this is how would large military sales affect stock price? Companies get slammed for being too close to militaries (e.g., google and its recent work). So the plausibility of EVs for military operations is only relevant for determining if military sales are even a possibility for driving stock price.
From that perspective there is the aforementioned downward push if a company is perceived as "not evil", but then again there's a lot of money to be made (see military budget) and in general business does not seem overly impacted by evil associations (see Kashioggi, Yemen, etc.) -- so for me I'm not sure what effect Tesla supplying military EVs would have on the stock price. But I think EVs are
very much the future, including in military operations.