I am running a Multiplus 12/2000/80 along with an MPPT and Renogy 40a DC to DC. I have two 150w solar panels and 4 100ah agm batteries.
When I plug into shore power and turn on the AC (Furrion Chill) the Multiplus makes a terrible sound and illuminates the overload light when the compressor kicks on. However, if I use an extension cord without the ground plug it works perfectly.
I’ve tried running on a Honda EU2200i, several cords etc. Only combo that works is the cord without the ground plug. I’ve triple checked the wiring.
What is going on???
