my money is on Porsche EVSE - the North American versions just continuously has problems - many many many Taycan owners gave up on Porsche EVSE's and moved onto any of many excellent high quality alternatives.
the Porsche unit offers no advantages and many downsides…cut your loses and move on.
I prefer the 14 ways anyways - cause you can now tick the "massage" option and that's a huge feature for me personally - and rules out the 18 ways most of the time for me personally.
there is no practical difference - if rear leg room is a priority consider something other than the macan/taycn - both have only mediocre rear passenger space
I have been fortunate to order many Porsche's and been clued in as to all the details from build "lock" to dealer delivery…
I have learned the following:
my $0.02 YMMV
even if plan to never ever ever use Tesla Superchargers - J-1772/CCS1 vehicles will benefit from a NACS adapter - because Electrify America just opened their first NACS/J-3400 DCFast charging stations…...
the difference between 150 kW and 270 kW in actual time due to the charging taper curve is 7 min or less…in practice for me the charge time from 10% to 80% was 25 minutes @ 150 kW charging station vs. Porsche's claimed/advertised/ideal 22 minutes for the same charge session @ 270 kW...
most (all?) vehicles that support ACC have some sort of indication somewhere on the dash what the speed of the "target" vehicle is in terms of "set speed"…but it's normally not very clear.
this very well could be a grounding problem - I wish you luck (honestly) - being an engineer I like finding "root problem cause" and then "fixing" it - it's always quite satisfying to actually find/fix the problem…I wish you luck in finding it's a grounding issue and then fixing/changing the...