My first time venturing into an off-grid power install and I am in the planning phase of this installation for my RV. The diagram shows my plan to install a Victron MultiPlus II 2x120V inverter along with the Cerbo GX. I may start with 2 LiFePO4 batteries and later go to 4 unless there is a compell…

Multiplus 2, 3000VA can charge at up to 120A at 12V. With the converter are you thinking about achieving a higher battery charge rate.

Hi Leon, do you have an updated diagram? If so, I am happy to take a look at it for you. I recently upgraded my RV (Thor Ace 30.1) to all victron equipment, so I understand a few of the nuances. I’m in the UK so I also had to convert to 240v as well. Depending upon what factory equipment you have …

Leon, just a thought ref having the Converter (which is essentially a charger and PSU combined) only work when you are on shore power. A simple fix would be to move its ac supply from the main ac distribution board (which will receive inverted power once your installation is in situ) to the ac input…

My ignorance, I thought the MultiPlus will invert only, but if it will charge when connected to AC then I can remove the converter which is a plus.

From my understanding I need this to drive the display.

Assuming you main distribution panel is a combined AC and DC unit i.e. 120v breakers and 12v fuses in one enclosure, you’ll need a fused supply from your busbars to the distribution panel. I fitted a battery protect in this circuit so that I cannot over discharge the battery. Your BMS in the battery…

@ludo you have a good point with bmv712. I was considering the Victron Touch monitor since it will be easier for my wife to also see the status without scrolling through the options. I will keep bmv712 in mind as an option and it will be a less expensive route. Thanks for pointing that out.

Remote connectivity is a requirement for me thus I opted for the Cerbo GX and touch 70. Plus if it’s an RV you can display all your tank info if your senders are compatible. Where do you stop - that’s the question. Ha ha

Great suggestions, I do like the option of still being able to charge the battery without the Inverter and definitely a great idea to connect it to the AC side of the inverter. Then it only works when I need it. I will also look into the dc-to-dc charging option. My RV is a 5th Wheel, so the optio…

RV installation with MultiPlus II - new installation

DIY

lgs (Leon) 21 March 2025 17:17 10

Here’s the updated diagram after the feedback. I removed the converter in this diagram.

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RV installation with MultiPlus II - new installation

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