I would imagine the first application for these will be for companies like Pepsi who can use them for in-city or semi-rural local delivery and install their own chargers. Of all the points a truck is used, a smart truck which only uses power when it actually moves - no idling - and returns to a home base each night is the ideal application, especially when it involves stop-and-go city driving where a lot of energy is expended starting going, and for the EV world, can be recaptured in braking... Add in the smarts to distribute the load of overnight charging multiple vehicles to reduce peak energy costs, and -bonus.
As for charging - if all it needs to do is add a few miles, then perhaps that charger adapter box allows them to use just one charger instead of combining several?