The big big drawback of every battery-powered electric vehicle is well, the fact that it is battery-powered. A battery has a dismal energy density compared to gasoline, which makes it in general terrible for long ranges and ties it to an operational grid. Far flung operations in a war zone with them are just not possible today. The ebike and other light electric vehicles are in my opinion only feasible in specific, limited, short-range support roles. Will that change in, let us say 50 years?
1) On the vehicle side it largely depends on battery technology. Even a factor four in energy density (coupled with a similar drop in price) will keep energy density magnitudes below gasoline. It will enlarge their role and make hybrids more attractive but will not substitute the combustion engine. Short tactical moves with silent and less heat-intensive electric motors should make surprise easier.
2) The grid or energy supply side is arguably more interesting. Why? If more and more renewables, especially solar and local storage comes online distributed and electric cars become common the military will profit at least in party from local and (very) fast charging.
This means that plug-in hybrids with fairly large batteries can tap into an additional source of energy reducing to some extent in developed countries the logistical tail. The dimension of this impact depends obviously on many factors, put it should increase with time.
Anyway a highly realistic LEV urban application.
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