Install is in a MB Sprinter
Victron Multiplus 12/120/3000
5 BattleBorn lifepo4 100 batteries in parallel
Lynx, Cerbo, Touch. MPPT, DC to DC, etc
All wires are proper gauge
Built the van over the winter and once all electrical was done I kept it plugged into shore power in my shop, which was 12/2 romex 20amp breaker with a GFCI receptacle. It never tripped breaker or GFCI after the build was done. It wasn't until about a month ago that the GFI started tripping. I plugged it into a different breaker with no GFI and it runs fine. Took it to our river property and plugged into the 30 amp GFCI breaker there and it tripped breaker every time the MP tried to switch over.
Ground and neutral bars are separate in my vans breaker panel. I went ahead and disconnected AC wires coming out of the MP that fed the breaker panel and still same issue. I lowered the limit in the MP to 15amp to see if that would help and same results. I also turned the disconnect to the batteries off and same issue.
I am sure its something simple I've overlooked but hoping for ideas.
Ground from Lynx is a 2/0 straight to medal wall of the van. Ground from the MP is to same wall of the van but is an 8 gauge
Thanks in advance for any ideas or suggestions.
