Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 06, 2025 ...

We long ago removed the bath GFCI outlet and replaced with a regular non-GFCI outlet. Too many problems made the change practical. We are aware of how GFCI outlets work, but RVs are a different animal and the GFCI downleg fed other outlets, that may have contributed to issues.

plug the coach into a 20 110=v circuit that we never had issues with before and it trips the GFI as soon as the load control is set above one amp.  So as a workarounds to that we went to a non GFI and it worked normally. In looking in the logic it grounds the neutral during DC battery inverter use. This explains the GFI issue. I personally really like what a GFI provides.

Wire I'm using

I'm curious.
I installed my Victron 3000 multi 12v several years ago. All was fine until I had to move the coach to my street to allow construction on the house. I thought no big deal,I will use my 50 amp to 120v power cord to keep all the batteries charged for the few days I'm parked on the street. I used this cord numerous times when I still had the original Freedom inverter installed and never a problem.
I plugged the 120v cord in and immediately blew a breaker in the house. I then tried another outlet/circuit in the house and the same problem. I eventually gave up on the idea of using the 120v power cord.
I had a Mobile RV tech come and check my set-up to see if I did something wrong, he found no problems with my install. I put this issue on the "way back burner" to someday address.
Scott, does this sound like the same issue you have with your Victron, won't work with 120v power source cord plugged into the 50amp outlet with an adapter?

@dsd  How did you end up running that wire?  Did you try and run it in the floor cable run that goes from the foot of the bed to the closet space, or did you run it out of the back of the utility/tank bay / under the coach and up into the engine compartment?

Also has anyone relocated the mains/generator transfer switch from the foot of the bed (for those coaches that have it there) to another location?  I was thinking that if moved it would open up space in the floor cable run to allow room for those new 6/4 cables to/from the inverter as the existing 6/3 lines would no longer be in that space.

Here's a few thoughts for you.  I don't have a Victron, I still have the Xantrex Freedom SW3000 unit.  While boondocking, I wanted to be able to run off a 2000w inverter generator, mainly to bring the batteries back up without having to run the PowerTech.  I have a 50a to 110v adapter as well.  I did need to add a binding plug that binds the neutral and common to get it to work.  I also set the power share on the Xantrex to 10a as when the unit would first come on, it will surge 3-5 amps more than this setting.  At 15a, it would pop the overload on the generator, so 10a setting it was.  The next issue was that when the charger started charging, it was set for maximum output (150a DC).  I had to reduce the charger output % to 50% to keep it from trying to pull too much from the generator.  I assume the Victron also has a charger max charge % setting too.  You may need to reduce this to get it to work off 110v.

So to follow up I did install the 40 amp DC to DC charger to protect the coach alternator. I had checked every thing and thought it was working correct. Couple days before our departure date I double, triple checked that it was working correct. On ground power 220 volt working correct. On battery working correct. On generator I came across an issue. It was creating the L2 output by consuming L1 power. It was not passing power from the generator L2 to output of Inverter L2. Rechecked everything and put a service call into Victron. At this point I was wondering if I had programed the inverter wrong? Double checked programming and saw nothing about inverter input, although the manual shows the different internal switching for different configurations. Next day still no call back and we are getting close top a hard departure time. Being that the inverter will not manage the L2 leg I decided to do a work around by disconnecting the L2 output from the inverter and jumper int L2 from my surge protector back to the L2 in the circuit breaker panel. I would now manage L1 and saw no load for L2 because it was disconnected and worked okay. BUT I now was only using half of what I wanted and lost all the reasons to purchase and install this thing.

I checked mine today and my multiplus gets both legs from the generator and powers both legs. Attached picture is from it running on the generator.

Thanks for the information Justin.  Nice to see an actual expert in the field sharing the hows and whys.  That said, looking at Victrons' info is somewhat confusing. 

I have a Xantrex Freedom SW3000 now, and would like to eventually replace it with a Victron unit. I've labored over the descriptions, trying to determine which option offers as much capability and functionality as possible, without have to reinvent the wheel like DSD did (running new Romex, etc).  I want a replacement solution.  I have kind of come to the conclusion that will be the original Multiplus, not a Multiplus II.

Keith, from my reading the main differences between the original Multiplus and Multiplus 2 3000 120 models (not the 2x120 version of the MP2) is form factor (allegedly for lower cost shipping) and "reduced production cost design" for the MP2.  The form factor difference is significant - I made cardboard cutouts of 2 models (as well as the MPPT, Lynx, and Cerbo GX) marked with cable attachment locations to help us evaluate the space requirements for both.

Form factor is one of the things that Scott said was an issue with the MP2.  The original Multiplus looks much more "square" like the Xantrex I have now.  I've already got a Cerbo GX and MPPT installed.

I paid for a wiring diagram and had to figure out how to integrate that with the Foretravel wiring.

Thank you very much for sharing your schematics.

One question I have is on the cables, you list a 6/3g from/to the inverter.  Is that SOOW cable you ran (basically 6/4) or did you run Romex (6/3 w/G).  Also any insights on how you ran that cable?  Did you leave the old 12/2 and 10/2 OEM Romex lines in place?

I would much rather work with 6 gauge SO cable which is significantly more flexible (and better suited for an RV application in my opinion).  The difference between SOOW and SJOW is the voltage rating, SO being rated at 600 volts and SJ at 300 volts.  The other difference is that SJ is much smaller in diameter and so that would be my choice since in this application since we're no where near 300 volts. 

Yes I used 6/4 SOOW wire.

I used fiberglass wire fishing rods  to push through to the back. I then attached the wire to the pole I pulled from the back, Michelle pushed from the front turned out to not be that bad.