Quote:
Originally Posted by Martinjlm
Great question. I don’t really know how to answer that one. I’ll have to “phone a friend”  |
I know it's apples and oranges, comparison-wise... but for reference, my home HVAC is a heat pump system with a two stage heat mode. If it gets below around 20 F outside, its not effective to just run the compressor in reverse anymore. So, it has to resort to "emergency heat", which is basicially some toaster wires/resistors, which makes the meter spin significantly faster.
So i'm inclined to believe that asking a battery source to provide heat via the same type of resistive load is very draining, and only useful to activate for a few minutes prior to charging. But if some (sustained in exteme cold outside temps) warming can drasitically improve the chemical reactivity enough to overcome that sustained loss, then I don't know?
It seems silly if these Range Extender EV configurations don't use the heat biproduct from the ICE component to help with this. Without it, I think BEVs are going to continue to suck in cold conditions.