Since this old thread has been opened, I will provide a couple of comments: The heat pump in the 2015 is significantly more efficient than the resistance heater was in the 2011.
My commute is long enough that I could not afford to let the heat run in the 2011 unless I wanted to stop on the way home for a charge. I used my heated motorcycle vest during the coldest mornings and only ran the heat if I needed defrost. The air conditioner had minimal impact to range during the summer even though it typically worked against higher inside/outside temperature differential compared to heat in the winter.
The heat pump in the 2015 heats the cabin with very little impact to range compared to the resistance heater. I have not been able to measure heat pump power from the wall during preheat because my car always uses the resistance heater when preheating while plugged in to L2 (have not tried 120-volt charging/preheating). The 2011 heater would draw the full 3.8kW that the 3.3 kW onboard charger could take from the wall. The heat pump seems to use a little bit more energy for cooling than the air conditioner in the 2011, but I don't know whether it is due to lower efficiency or the black leather interior absorbing more solar energy.
Gerry
My commute is long enough that I could not afford to let the heat run in the 2011 unless I wanted to stop on the way home for a charge. I used my heated motorcycle vest during the coldest mornings and only ran the heat if I needed defrost. The air conditioner had minimal impact to range during the summer even though it typically worked against higher inside/outside temperature differential compared to heat in the winter.
The heat pump in the 2015 heats the cabin with very little impact to range compared to the resistance heater. I have not been able to measure heat pump power from the wall during preheat because my car always uses the resistance heater when preheating while plugged in to L2 (have not tried 120-volt charging/preheating). The 2011 heater would draw the full 3.8kW that the 3.3 kW onboard charger could take from the wall. The heat pump seems to use a little bit more energy for cooling than the air conditioner in the 2011, but I don't know whether it is due to lower efficiency or the black leather interior absorbing more solar energy.
Gerry