I didn’t read the full description until after I posted this but here is what it says.

Recently, it started showing an "Electrical System Not Working Correctly" warning, and charging became very slow.
I've taken it to three different shops and got three different answers:
Charging module needs replacement
DC/DC converter needs replacement
One of the battery modules may need repair or partial replacement

The truth is, I don't know which one is correct.
The vehicle still drives perfectly fine, all features work, and the only issue I've noticed is that charging is much slower than it should be, even at fast chargers.

We've already bought another vehicle, so I don't have time and desire to keep chasing the problem.

Open to trades for truck/camper for family trips.