AlanSubie4Life
Efficiency Obsessed Member
Correct, but with TOU plan, when it comes out of the outlet makes a difference. There appears to be some draw on the shore power though aside from HV charging, perhaps for the wifi and bluetooth radios as well as various pumps, circuit boards for BMS, etc. But at least the 12v charging is coming from the HV battery.
If you set your car to charge at a certain time, it will (for the most part) only charge at that time at that location. For TOU that is what you probably should do.
The UMC draws 4 watts all the time (when not plugged into car as well) which is insane too, but don’t get me started. At least that may be to prevent fires and for safety features in the UMC. I assume Wall Connector is the same deal.
To keep efficiency of the penthouse charger high, it waits for a few % discharge below the target and then tops off the HV at max current from shore power. I assume this is the entire reason they don’t draw vampire directly from the wall when plugged in - it would make the problem far worse due to reduced charger efficiency at low current.
What exactly changes/happens in cold weather, with car outside, I do not know. I would think it still would not draw from the UMC/Wall connector, since I don’t think the car really cares whether the battery is cold. (It doesn’t spend energy keeping the battery constantly warm, I don’t think. Since that would be really wasteful and it is not needed to keep the battery safe. Someone can correct me if I am wrong.) I don’t know whether the cold battery derated % triggers the charging threshold as well, or whether the car “knows” the battery is just cold, not too low (it certainly knows the battery is cold, just not sure how it is programmed to react), and thus does not charge if the battery is quite far below your set charge target. Unimportant details...
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