Better way to arrange main fuses, DC disconnect, busbars etc?

I am working on a parallel battery setup (so two wires going out) and a dual inverter setup. My diagram.... works but feels messy with all these 3 spot busbars I would need. Wondering if there is a better way to manage all this? Ive looked at the Lynx Distribution and Power In but I dont think that will really help much as I still have shunts/disconnects/main fuses to work with. Perhaps rearranging things but not sure. Open to suggestions. Image is preview - attached PDF is whole thang.

Re look at Victron- The PowerIn (w/fuses added) and bolt the end sticking out to the shunt and to the on/off switch. YouTube “explorist life” shows it in their videos. That eliminates two large short cables.


Good Luck

Ive looked at this setup but it didnt seem to save much. Id be replacing the current 2 prong busbar to the DC disconnect with this. I suppose I could consolidate some of the neg busbar into it - the ground cables can prob go in one... Did find this which might be a solution though still got this dangling fuse/dc disconnect. I heard Midnite solar may have an all in one but havent found it yet.

Ground connections shouldn't be touching your battery circuit.

I would put a breaker on the output of each 24 volt string. More like:

( battery A ) - ( battery B ) - -- (breaker ) ---- ( positive bus bar )

( battery C ) ---- ( battery D ) ---- ( breaker ) ---- ( positive bus bar )


( Inverter A ) ---- ( breaker ) ----- ( positive bus bar )

( solar ) ----- ( breaker ) ----- ( positive bus bar )

( fuse block ) - -- ( breaker ) - -- ( positive bus bar ) - for small loads like signals, etc.

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On the negative side, similar.

( battery A ) ----- ( etc ) ------ (battery negative bus bar ) --------- (shunt ) ---- ( system negative bus bar )

Same for the second battery string.

Then

(inverter 1 negative ) - (system negative bus bar )

etc.

Example breaker.

https://www.bluesea.com/products/category/14/30/Circuit_Breakers/187-Series

You will need some higher count bus bars to pull it all together. Might require connecting a few together.


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There will be times when you will want to isolate off various sections of it and this also makes system re-sets easy.

Sennen said:

Ground connections shouldn't be touching your battery circuit.

Click to expand...

Im confused as to when they should/should not. Every Victron schematic (which is what this derived from) grounds the multis to the neg busbar.

cyberwombat said:

Im confused as to when they should/should not. Every Victron schematic (which is what this derived from) grounds the multis to the neg busbar.

Click to expand...

Only in a mobile installation. (RV, Boat, camper, van)

Thanks for all your suggestions. I've revised my plans to use a couple of Lynx Distributors in "reverse" mode as I have seen to manage multiple batteries/inverters. That allows me to have dedicated fuses for each battery string. Im not totally sure I wont need to add a copper bar to connect the two distributors unless the dc disconnect and the shunt are the same spacing but that should be easily workable.
Also now have dedicated ground bar and a single earth rod. I am bonding the PV frames and structure to the EMT conduit and then to the ground busbar. Seems having a single rod is the way to go else connect both rods by wire though am not sure which is best here or if it matters - the array is 100' from equipment. Appreciate any input.

Considering a Cerbo GX or Rpi running Venus os for management?

I have but for the moment am trying to do bare min to get my plans approved. Will def expand later with one of those, split phase, generator etc but want to work with small bites (i.e. less $ too)