JoshP,

Welcome! The warm-up period is not for charging the battery but for warming up the catalytic converter so the engine can start and stop smoothly. It shouldn't take more then 5 to 10 minutes depending on how cold it is, however mine always takes a little bit longer then the blue light indicates. I think the car is ready when the light goes off, but because the computer is always scanning for the best times to charge or not charge the battery, there are many times that the car does not go in to EV mode below 40 even after long drives.

There is also no reason to wait until the battery indicator is full because that rarely happens. The system is balanced so that during normal operation the charge is usually around the top quarter give or take a little. During high AC usage or driving in EV mode for over a mile or driving in constant stop-and-go traffic you may drain the indicator down to almost empty, but then the engine comes on and charges it up for a while. The battery is never fully empty and the only time I have ever seen the battery indicator full was at the end of a long mile+ downhill with light breaking.

Hey good luck with your NAH. I really love mine.