Here's a question that probably won't be of interest until next fall but just curious now.

I know that the AC is driven by an electric motor so the compressor still works when the engine if off in the EV mode keeping the cabin cool. What about the heater? I don't think the engine has an electric water pump so does the heater turn cold when the engine shuts off in the winter when in EV mode or does the system reduce the duration of the EV mode in order to keep the heater working?