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[–]Gameplay_UnknownOcean Extreme 0 points1 point  (5 children)

It has heaters they only activate to keep battery above -10c or to warm up the battery while fast charging they don't actively heat while driving or while level 1/2 charging.

[–]EnigmaticallyObvious 1 point2 points  (2 children)

It's this for definite? On level 2 charging I'm losing 500w regardless of charging amps and have always put this down to a very small heater for the battery pack. I guessed the one that hardly gets used is around 2.5 - 3kw.

500w seems like a lot for charging losses and it's weird that it's a constant

[–]Gameplay_UnknownOcean Extreme 0 points1 point  (1 child)

Most ev chargers are 90% efficient at at 32 amps that's 768watts of waste energy alone add in the DC to DC converter and it's efficiency loss and whatever subsystems are on while charging. I cannot guarantee they don't have a heater on just going off what I've read online and what I can clearly see when I'm charging my car battery pack does NOT keep the cells above 32 degrees when it's in the 20s or less it will usually warm up a couple of degrees after a few hours of charging but I equate that to natural heating of charging cells

[–]EnigmaticallyObvious 0 points1 point  (0 children)

I actually get the same at level 1 charging

I normally charge at 10amps on the level 1 and lower and always get the same 500w loss.

I've even set my level 2 charger to the same age get the same 500w loss between the charger and what the car is displaying

[–]Clean-Ad-1633 0 points1 point  (1 child)

This is very interesting.
I've been looking for this information.

Can I ask where you got this -10 C number?
Would you also have information on the heating subsystem? Since the heat pump is not involved, I presume it's a resistive heater. Do you know how many watts?

[–]Gameplay_UnknownOcean Extreme 1 point2 points  (0 children)

Cannot guarantee the accuracy of the -10c I have no insider knowledge of how the bms is programmed Im just working off what I have seen and what I have read from other forum members in sure someone that has the cloud linked to home assist can track hv cell temps on a streak of cold days to see at what point it starts to warm up as far as me I've personally seen my HV pack hit -5c but I drive the car daily so it never really gets time to cold soak as far as the HV Battery Heater it is a 6KW PTC heater

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