Do EVs and charging areas emit an electronic signature?
While the vehicle/motor control circuits, motor(s), and chargers could emit RFI, with proper shielding the RFI would be minimal. OTOH, the IR signatures probably would be more difficult to conceal.
The big concern, IMO, would be the limited range - miles or hours - of the things plus the logistics problems of locating and fueling/powering charging stations. This looks to be as big a moneypit as the fictional "Hover Tank".