I will say . . . one nice thing about an onboard display is the potential for an easy to read summary of what the charger is doing. I'm thinking about a large font, single word summary like "CHARGING", "BALANCING", etc. It would be nice to be able to quickly see what the charger is doing, without having to get into the car to see the small font display specifics. Then, if you want more specific details, you can always tap the screen to have it go into more specifics. Not sure if this is possible, but maybe instead of the CHARGING, etc. it could show "X min. until full", etc.