Hi all, I have a question about where to bond earth and neutral … Looking to do a multiplus 2 with grid connection… I plan on using a gfci : residual current device to supply the multiplus Looking to do battery backup too - so when the power goes out , power supply occurs etc Also using gcfi’s …

Have you ever had a look at any installation plans or technical documentation from Victron? We know neither your technical qualifications nor the desired configuration of the system? What type of grid do you have on site? A few drawings would definitely help here. PS: there are already quite a f…

Hello @Bencornish , I would strongly recommend to read the important baseline documents - including grounding, neutral and earth link - provided by Victron before you install your system. In particular Wiring Unlimited . There is a section covering all your questions: 7.4. Neutral to earth link …

So, where should (or should not) RCD’s be used. In the examples shown, in a house environment, the load is most likely compried of several RCD protected circuits such as power points/lights/cooking equipment etc. Is it reasonable to install RCD’s in a downstream environment like that. Also on the u…

Hello @ShallowAl . Interesting question :slightly_smiling_face: Cascading RCDs requires at least the right RCD types in terms of current and trigger delay. In the diagram attached (sorry for the german text, source ABB), you see a main RCD (in your words, the upstream RCD) and a cascaded RCD. The tw…

Thanks … I have read that and it’s quite good explanation… When I did my off grid cabin(no mains - only a multiplus - also ac coupled with a fronius) , I relied on the Victron men relay, as per txt book install … I had a rcd nuisance trip about once per month - every month… almost like there was s…

You can’t have two physical links, because then part of the N current would bypass one of the RCDs because it would go via the PE link between the two links, and that’ll trip your RCD instantly.

I have loved this topic and learned so much and so little at the same time. I’m hooking up 2 multiplus 48/5000s in 240 split phase and I planned to use the master to handle the neutral/ground bond but now I’m hearing that it can trip a lot AND that if I plug it into a generator it should be unbonded…

[image] JBRal: plug it into a generator it should be unbonded? This happens automatically. Look in the manual at the block diagram. Earth neutral is bonded at source is the basic law. What that means is if the source is grid that is the bond used. When the inverter is disconnected is crea…

Earth/neutral bonding with multiplus

Q&A and troubleshooting

JBRal 13 February 2026 04:10 9

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Earth/neutral bonding with multiplus

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