I'm curious if anyone has an explanation for why the HVB doesn't charge when the gear selector is in neutral or reverse?
I've noticed that when the ICE is running, whenever I shift into neutral the HVB status (left screen) immediately switches to the down arrow indicating HVB battery discharge. This happens if the car is moving or is stopped. When stopped, when I shift from neutral to park, the HVB status immediately displays the up arrow. It doesn't seem like there would be any difference in the ICE/MG1/MG2 interactions between neutral (stopped) and park, yet park charges and neutral doesn't.
For reverse, I've noticed that as I start to back out of the garage, the HVB up arrow is displayed, so the car starts out charging the HVB. (The HVB is at about 25% charge.) I have a rather long driveway and it takes about 30 seconds to slowly back down it. After about 15 seconds, the HVB display switches to the down arrow and I haven't seen it switch back to charging, even if I have to wait for a minute for traffic to clear before backing out into the street. As I'm sitting there not moving with the ICE running, I had been thinking that "at least the HVB is being charged", but now I'm realizing that its not. I've started shifting from reverse to park if I have to wait.