Pair A Better Route Planner (ABRP) with a cheap Bluetooth Low Energy OBD-II dongle and it reads your car’s live state of charge and real consumption straight off the vehicle, then recalculates charging stops on the fly if you’re using more energy than expected. That’s the difference from a generic range estimate: the route adapts to how your specific car, cargo, and driving style are actually performing that day, not a manufacturer’s spec-sheet number.