Victron multiplus help

[M&B]

We have a 50 amp motorhome, half of the year (winter) we boondock in Arizona with solar, and the other half ( spring, summer and fall) we are on 50 amp shore power.
We have been slowing transitioning over to Victron for our equipment. Have the MPPT, Shunt, Lynx.
Now we need to replace the present inverter/charger. Xantrex 3000w inverter/charger that presently powers a sub panel with microwave, and a couple receptacles as well as charges existing LA batteries. ( new replacements LiTime 4x100 ah lithium sitting ready for install)
We just purchased a Victron Multiplus-II 12/3000 120-50 2x120V. Since we have to do some modifications as to relocation and some rewiring, for it’s permanent home ( we move slow) can we just do a Remove and Replace of the existing inverter/charger for now until we do a relocations instead of doing whole rv wiring through the Victron? We are perfect fine for have only microwave and a couple receptacle breakers while boondocking. ( we don’t need ACs , heats pumps, electric water heater etc, if we do we just fire up the on board generator)
Hopefully this makes sense.

 

[Q-Dog]

Kinda depends on how the Xantrex is wired.

 

[WorldwideDave]

I think you’re asking if you can get away with only swapping out your inverter? I think the Victron will want a battery temp sensor at the very least connected to your set up.

 

[Q-Dog]

That MultiPlus can power both sides of a 50 amp RV. How is the Xantrex wired?

 

[M&B]

Right now the xantrex has power coming from main panel breaker, then a wire that runs from the Xantrex to the Subpanel.

 

[M&B]

That MultiPlus can power both sides of a 50 amp RV. How is the Xantrex

I think you’re asking if you can get away with only swapping out your inverter? I think the Victron will want a battery temp sensor at the very least connected to your set up.

Yes for now I just want to swap out the Xantrex to the multiplus. We don’t need it to power both sides yet.

 

[OTRwSolar]

We have a Multiplus II 3000 12v 2x120 wired in a 30a configuration using only the AC OUT 1 terminals (vs. a 50a split-phase which uses both the AC out 1 and AC out 2 terminals). It works fine. If I understand your current configuration correctly you're using your Xantrex in a similar manner.

Sounds like your Xantrex 120vac input is wired to one leg/side of the incoming 50a shore power. The Xantrex 120vac output then feeds a subpanel. If you just want to retain the same capability you currently have with the Xantrex, should be able to remove the 120vac input to the Xantrex and reconnect it to the AC IN on the Multiplus, then remove the 120vac output from the Xantrex and connect it to the AC OUT 1 on the Multiplus. Lastly, remove the 12vdc input to the Xantrex and reconnect it to the pos/neg DC terminals on the Multiplus. Make sure and connect all the appropriate chassis/system grounds, too. The temp sensor @WorldwideDave mentioned is optional--it operates fine without it.

 

[sunshine_eggo]

Right now the xantrex has power coming from main panel breaker, then a wire that runs from the Xantrex to the Subpanel.

You could sub the MP into the same scheme only connecting L1 N and G in and out.

 

[Q-Dog]

Should not be a problem. I guess you would ignore L2 in the MultiPlus. And make sure wiring and fuses are adequate.

By ignoring L2 you are not using the main reason that inverter exists.

 

[M&B]

We have a Multiplus II 3000 12v 2x120 wired in a 30a configuration using only the AC OUT 1 terminals (vs. a 50a split-phase which uses both the AC out 1 and AC out 2 terminals). It works fine. If I understand your current configuration correctly you're using your Xantrex in a similar manner.

Sounds like your Xantrex 120vac input is wired to one leg/side of the incoming 50a shore power. The Xantrex 120vac output then feeds a subpanel. If you just want to retain the same capability you currently have with the Xantrex, should be able to remove the 120vac input to the Xantrex and reconnect it to the AC IN on the Multiplus, then remove the 120vac output from the Xantrex and connect it to the AC OUT 1 on the Multiplus. Lastly, remove the 12vdc input to the Xantrex and reconnect it to the pos/neg DC terminals on the Multiplus. Make sure and connect all the appropriate chassis/system grounds, too. The temp sensor @WorldwideDave mentioned is optional--it operates fine without it.

Thanks this is what I was hoping to do!

 

[M&B]

You could sub the MP into the same scheme only connecting L1 N and G in and out.

Perfect thanks

 

[M&B]

Should not be a problem. I guess you would ignore L2 in the MultiPlus. And make sure wiring and fuses are adequate.

By ignoring L2 you are not using the main reason that inverter exists.

Thanks