[princevegeta89]

Depends. They get a virtually continual supply of standby power that can last for months if left untouched. So from a technology standpoint that enables them to do many things - from being connected to the network, aware of their location on the map, recording camera footage and other remote capabilities. ICE cars do have some of these but the huge battery packs on EVs make these very feasible.

[seanmcdirmid]

EVs use 12V for standby just like ICEs. I guess it could occasionally recharge it from the main battery, but needing a jump is a thing for EVs also in theory. I’ve also had issues with the 12V disabling remote systems because of abnormal discharge (well, BMW has an issue with their lock on weak away in that it keeps drawing power if the fob gets near even if the car is locked).

[MBCook]

Do they?

I was under the impression most EVs cut off the connection to the high voltage battery almost all the time they’re not in use.

They rely on a 12 V battery or a 48 V battery like a normal car.

The only thing I’m aware of that special is that if that low voltage battery gets low enough the car will detect it and recharge it from the high voltage battery, temporarily connecting it for that purpose.

[magicalhippo]

> They rely on a 12 V battery or a 48 V battery like a normal car.

Which leads to "fun" situations when that battery runs out, like not being able to get into your car or start it. However not much power is needed, so a tiny portable jump pack is enough to get things going.

Both me and my sister has experienced this, me a Nissan Leaf and her a VW ID.4, good times.

[princevegeta89]

Well that was what I meant - the battery pack meaning the entire system of batteries, be it 1 or 2 or 3.

That really enables them to have a continuous state of power supply for a long long time. This cannot be achieved by ICE cars and not even hybrids for that matter.

[eldaisfish]

you are mistaken. Not a single EV or hybrid car uses power directly from the traction battery for the 12 V system.

[cyberax]

It depends on your definition. Tesla Model 3 has a dedicated low-current connection to the high-voltage battery that bypasses the main contactors, specifically to power the 12V system.