The generator in the Palazzo is an inverter based diesel. Highly unlikely that is the issue with your DC control boards. I would be more focused on your Magnum charger that is also a modified sine wave inverter.
I had an issue with inverter / charger reading low AC voltage and cutting out. Thor swapped it to a full Sine wave, which I thought was bunk, but it worked. Not your issue, but how the magnum creates DC from the AC source sounds like a better place to start.
2018 Thor Palazzo 33.2
2009 Jeep Liberty