Everything seems to be working with my Multiplus 12/2000/80-15 120v except when I plugin shore power. As soon as I do plugin to an outlet at my house, the breaker at my house flips immediately.
I’ve tested:
shore power cords and inlet and they all work and tested well
checked all wiring, fuses/breakers and connections and all seem well from what I can tell
used multimeter to check for continuous flow issues (wiring, ground wires, etc.) and didn’t find any issues
if the multiplus is turned to “off” position then the house breaker doesn’t flip
I believe the van AC wiring looks correct (shore power inlet > breaker > multiplus AC in)
I’m new to all of this so I’m not sure what I’m doing wrong. I have breakers/fuses/on-off switches for everything to protect everything. Are there any settings from the app or anything else that could be causing this? I’m in the US so I wasn’t sure if I needed to set any settings on the MultiPlus.
I assume this is a vehicle install which you are connecting to an outside socket at your house. If this is the case, these attached threads may throw some light on a the issue.
I’m having a similar issue, but just swapped L1 and L2 feeds at the main breaker in the RV and the issue stayed on the same circuits, which means it’s not a multiplus issue most likely and is in the breaker panel somewhere. I’ve got a Brinkley with a sub panel built into the main panel. I have a new panel on order without a sub panel, but even circuits not on the sub portion on that half will cause a trip. Swap L1 and L2 in your panel and see what happens.
The wife just had idea and it showed us the problem was the GFCI breaker even though the GFCI is not tripping and the whole breaker is. We took our extension cord and ran it into the house to a 15 amp outlet and all our L2 circuits where able to be powered on and we even ran our furion chill cube AC off it for a few minutes when it would otherwise trip almost immediately. It’s got to be related to how the Mutliplus II combines L1 and L2 internally when using a dogbone adapter as it recognizes the input being the same and ignores L2 input and somehow outputs L1 input to both L1 and L2 output in that scenario.
Thanks again to everyone. The post that @pwfarnell provided about getting a surge protector ($9.99) and the 15 amp single outlet grounding adapter ($0.99) resolved the issue.
I really hope Victron does something about this as something that costs about $1,000 shouldn’t have issues like this. Definitely makes me question their quality control management.
Update… One year later after using the surge protector and “fix” to get things to work on a known bug, it looks like there might not be an actual issue with my Multiplus at all but a misunderstanding and not knowing of a setting change that was needed to be done. I found a setting for the shore current which was set at 28a. But if I’m charging directly to my standard house power outlet (US) I should use 12a. I unplugged shore power and removed the “fix” adapters I’ve been using for over a year, changed the shore current to 12a, and then plugged back in the shore power at my house and for the first time ever, it didn’t trip the breaker and charged without the adapters. I will continue to test this, but this makes more sense then the “fix” that myself and others have been using over the years. So if you’re new to setting this up and you keep tripping the house breaker, make sure your shore current is set for the current you will be using.
Am I correct in understanding the Multiplus was incorrectly configured to draw 28A and you plugged it into a 15A outlet and the breaker tripped as it should?
Yes, I was a first timer a year ago and hadn’t made any changes on the shore current settings on the Multiplus as I didn’t know that had to be done. When I used a regular 30a cable at a campground then there were no issues. But when I used an adapter for the 30a to my 10 awg extension chord and try to plugin to my house, it would trip the house breaker. There was a “fix” I was recommended back then which worked and let me power from the house, but I don’t remember anyone ever saying anything about changing the shore current on the Multiplus so it matches up with the power of the house outlet I was plugging into. Once I found this setting, I figured I would test it out without the extra “fix” adapters and for the first time, it didn’t trip the breaker at the house.
This makes sense to me but I’m not an expert and just providing my experience so if I’m incorrect on any of this, please let me know.
Got it. We all learn from doing. Glad the “Fix” didn’t prove to be a fire hazard. Happy to hear you have it sorted - its good to share these experiences so other folks benefit.
