I was going around checking the torque on everything, with the torque wrench set to ~14NM.
However when I got to the inverter I forgot that it has a low torque setting of 12NM.
I was surprised that the bolts turned so much and I heard a little crunching from the PCB.
Then I remember and backed it off and reset the torque wrench to 12NM and tightened it again.
Is there likely any damage to the negative terminal, or is a little crunching ok if only over torqued 2-3NM at most for a moment.
Do the newer gen multiplus II 6.5k use the PCB trace terminal?
This really depends on whether the bolt head was soldered to the PCB. I think the only way to resolve this would be to dismantle and carry out a physical inspection before applying any power. If the trace is torn then this can be repaired with some thin sheet copper.
Visual inspection from the front looks ok.
The crunching could also have been the material around the parameter of the terminals, it is some kind of insulatated film.
Will see if I have any issue long term.