@Salvo definitely. I'd hope the people building these have taken that into consideration! - you could be smart charging the modules based on how recently they had been discharged, then loading them into the rescue vehicle as needed... I'd say the majority of uses are going to be when a planned charge cannot happen due to faulty charger or random incompatibility (had happened to me a couple times but I was able to get to the nearest charger, but in some areas that may be a problem, particularly rural Australia!) and you won't need to be charging the vehicle to 100 percent, just to the nearest static DC charger.