I guess it makes sense but apparently the C-Max is programmed to not charge the HVB in neutral even with low SOC. I had started up but was waiting in the driveway - ICE had started since SOC was low (EV+) - and noticed HVB discharging. Shift to forward, reverse or park and it would charge. Shift to neutral and it would discharge. So, neutral really means 'no load on the ICE' as it would with a conventional drive train. I wonder what would happen if you sat there a long time? Hopefully its programmed to start charging at some point!