I agree it is not unreasonable for 12v to get a quick jolt from big brother if necessary!
So doing some research on this ... as I would have thought the 12v got recharged from the Regen Breaking
(or similar) , but I was wrong as most EV's do have a DC to DC converter for the main battery to charge the 12v.
However if the battery gets that bad it can't activate the converter - but this is a general problem with older EV's than newer one's.
From what I can tell the 12v batter has it's only little "computer". This is run off the 12v and monitors it too, plus it powers all the fans, lights, security features, ... in fact almost everything that isn't the main motors. It even starts up your main HV battery when you need to use the car - yes your HV batteries get isolated from the car when not in use.
Basically the 12v is doing a lot of little loads ... in an ICE car it provides a massive jolt every time it starts up and this actually helps it, as 100 years of R&D have made these car batteries really efficient for an ICE car. In an EV it's just doing all the small jobs all the time and never get's that big bang on start up. Hence why Long term they tend to fail (like 3-5 years).
So what's the issue here?
Well the German page is a bit unclear as it's translating for me, but I guess something is wrong with that little 12V "computer" and it failing to monitor the battery correctly .. and that's not connected to the main central infotainment screen so doesn't get OTA updates. Hence why a visit was needed as you need to directly update via physical connection.
My ICE Jag had 12+ "computers" in it running all kinds of things. Ok in an EV I guess it's lot less, but it wouldn't shock me to find out that the P*2 has 3-6 computers and only the main one is connected to the WiFi for OTA updates.
Why wouldn't they connect them all to the central computer? Well cost probably ... could be simplicity too ... and also once these are built they are never normally updated.
Again I would assume that anyone getting their car after this time will already have the change applied. So I wouldn't worry. If it turns out to be a major problem then Polestar will need to put their PR department into overdrive
