So the concern is with the High Voltage Battery (HVB) temperature. The booklet says in extreme temperatures (high or low), the battery needs to be 'conditioned'. Which is to say it needs to be warmed up or cooled off. Because of this, the booklet recommends that we leave the vehicle plugged in while parked during those times of the year when it is very hot or very cold.Hi all:
I can't find the thread (or posts) but it's been discussed here how the 4xe's owner's manual has detailed situations where extremes of temperature, in fact extremes not unlikely to be seen in the States, prevent the 4xe from starting.
Has this ever been resolved in terms of its accuracy or some fix?
I don't know what battery/batteries crank the the engine. But it would seem to me that a temperature sensor could detect such extremes and signal the vehicle to crank the engine, and run off of it exclusively, rather than charging or discharging (using) the battery bank below the back seat)...thereby allow it to share the same temperature range of operation as any of the ICE based JLs.
..that is if the cranking battery is not also the propulsion battery.
From that I have learned so far, the 4xe doesn't have traditional starter.....or it shouldn't have one at least. Since it has a MGU (Motor Generator Unit) bolted to the engine, that thing should be able to start the engine and hence no need for a 12v starter. Problem is the MGU is powered by the HVB so if that battery is too cold or too hot then even the engine won't start. The 12v battery doesn't help here.
So, leave your Wrangler 4xe plugged in when it's very hot or very cold and you should be fine. According to the booklet, it will heat or cool the battery provided you have it plugged in and your EVSE is powered up. This is a case where it isn't ideal to have a smart EVSE and program the charge times from the EVSE end. If you do that, then your vehicle might not be able to heat or cool the battery when needed because the EVSE will be on a timer. Some "smart" EVSEs are integrated with the vehicle and the vehicle might be able to 'wake up' the EVSE. I don't know if Mopar offers a smart L2 EVSE or if it would even have that feature.
We are better off just using the charge schedule in the vehicle and set the EVSE to be promiscuous (put out all the time). Then as long as you leave it plugged in when parked then it will be ready to go when needed.
I hope this helps.