johnrhansen wrote:I was able to measure the power consumption of my new unit. It was drawing 1500 watts. If I calculated it correctly thats only 2.3 times better than resistance heat. This whole experience makes me think the heat pump on the leaf performs similarly, probably worse because it is a mobile unit that can't have as large or as heavy evap and condser coils as a stationary unit can.
looking at amount of power consumed by the traction motor vs the heater and the other factors reducing range in cold weather, I cant imagine having a heat pump would increase your range that much vs the resistance ones.
The heat pump on the LEAF offers a similar benefit, and according to Nissan, it substantially helps preserve usable range in wintry conditions.
I did my best to find the data presented at the 2013 LEAF introduction last year. I tried to get higher resolution, but I couldn't. I'm sorry, but I hope that this puts it to rest.
To be clear, this is not the first time that I see the effectiveness of the heat pump used in an EV to be questioned. According to the data presented by the LEAF engineering team, a significant benefit can be expected around 0°C, and the ambient temperature would have to go down to about -15°C for the heat pump to stop offering a benefit over the heater used in the previous model year. If you find more relevant references, please post it.