The heatpump is a great advantage for cold to moderate Winter temps, when running the heat isn't vital but is important for comfort. When temps fall below about -5C, the advantage drops off, and when you get to whatever 14F is in Celsius, then it's virtually gone - when compared to the 2013+ air-heating resistance heater.
2013 "Brilliant Silver" SV with Premium and no QC, a 2009 Vectrix VX-1 W/18 Leaf modules, and 3 EZIP E-bicycles.
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.