Pretty much all smooth_joey said I will agree with, poor installation wiring in general, but motorhome dealers are not wizards at wiring!
If I am accurately modeling the topology, do you agree that their are multiple fault paths?
Can you see anything incorrect in my drawing or reasoning?
I can run both air conditioners as I did all summer long in Florida.Since OP doesn't have enough battery to run 2 x air conditioners.
I suggest he sell the 2x multiplus and get one of these instead.
Still needs the transfer switch unless he wants to manually plug the generator into shore power.MultiPlus-II 2x 120V - Victron Energy
The MultiPlus-II 2 x120V is the perfect one-box mobile solution for standard North American 50A 120/240VAC split-phase applications.www.victronenergy.com
Off battery, they would only run for ~7 hours if you ran nothing else.I can run both air conditioners as I did all summer long in Florida.
In where?I have 2 of the multi plus 2 in now.
In that case just run the air conditioner off of the generator and get rid of a life safety wiring issueIf not on shore power, all I need to do is fire up the oan generator and charge the batteries right up, and run the air at the same time.
Otherwise an autotransformer would have to be in the mix.
An autotransformer is only used to “hack patch” a 230 volt system for use in a 120/240 volt system. The Victron units for sale in the U.S. are built for 120/240 volt service, They will not need an autotransformer
I just checked and the legacy multiplus supports parallel operation in split phase mode.With the Multiplus (I believe) you will need a transfer switch.
You have two possible 120v inputs - a generator and shore power. The Multiplus only has one 120v input. You need a transfer switch to manage that. (If you had two Victron Quattro’s it has two inputs - so you would not need the transfer switch - it would be built-in).
Here are a few other questions- are the two inverters set up as split-phase (so they run together)? The Victron’s (I believe) only create the N-G bonding when they are in inverter mode. So once they are setup in split- phase - the Master inverter controls the N-G bonding.
If they are NOT setup in split phase and so each inverter is just running its downstream panel - did the installers disable the N-G bonding in one of the Multiplus’s? That’s a software option that I believe will fix the N-G bonding issue.
OOPS......wrong on that one the Multiplus II can pass through 120/240 with 120/240 volts in or 120 volts only with a 120 volt input only but in invert mode it has 120 volt outputs, BUT.........It’s not 120/240 in invert modeSince OP doesn't have enough battery to run 2 x air conditioners.
I suggest he sell the 2x multiplus and get one of these instead.
Still needs the transfer switch unless he wants to manually plug the generator into shore power.MultiPlus-II 2x 120V - Victron Energy
The MultiPlus-II 2 x120V is the perfect one-box mobile solution for standard North American 50A 120/240VAC split-phase applications.www.victronenergy.com
The quote above was from someone way back on the first page. Unfortunately, that is true of the entire stinking RV industry. Crappy, shoddy, patched up, piss poor workmanship. They totally don't care. Once they get your check, the salesman disappears and the service guys are buried multiple levels deep in a never ending voice mail black hole. The whole industry should be ashamed of the product they put out.It's clear that the people that did your electrical system don't care at all about doing quality work.
OOPS again.....3 phase from a 120 volt only inverter....ONLY if you are WYE 3 phase 120/208 volts NOT 120/240 DELTA 3 phase
The multiplus 2 can bypass split phase and provide power assist on one leg.OOPS......wrong on that one the Multiplus II can pass through 120/240 with 120/240 volts in or 120 volts only with a 120 volt input only but in invert mode it has 120 volt outputs, BUT.........It’s not 120/240 in invert mode
You would need two Multiplus II to get 120/240 volt output
Some can do 120/240 pass through from a 120 volt input and do 120/240 output from invert mode
All Magnasine MSXXXXAE and PAE models can as well as the Schneider SW series
Victron’s data is misleading, 2 X 120 volt outputs is not 120/240 volts
2x legacy multiplus can do parallel 120 or 120/240.OOPS again.....3 phase from a 120 volt only inverter....ONLY if you are WYE 3 phase 120/208 volts NOT 120/240 DELTA 3 phase
An inverter that can invert to split phase is not required for this implementation.OOPS......wrong on that one the Multiplus II can pass through 120/240 with 120/240 volts in or 120 volts only with a 120 volt input only but in invert mode it has 120 volt outputs, BUT.........It’s not 120/240 in invert mode
You would need two Multiplus II to get 120/240 volt output