Dumb question, which end of the shunt?

[Rednecktek]

OK gang, I'm having a brain fart and can't remember seeing an answer to a simple question. My camp setup will have all the battery banks going to bus bars, then bus bar to shunt, then shunt to loads.

Which end of the shunt does the SCC-Neg line go to? Battery side or load side? Does it matter?

 

[John Frum]

A typical shunt has 3 terminals.
In a typical setup the shunt goes between the battery negative terminal and the negative busbar so that all system current in and out of the battery goes through the shunt.
I made this diagram for a specific setup but the overall pattern is very common.
Notice the shunt goes between the negative busbar and the battery negative terminal.

legend {
    {} { functional block }
    nnn|NNN| { fused busbar position where nnn is the wire guage and NNN is the fuse rating in amps }
    nnn|UUU| { un-fused busbar position where nnn is the wire guage }
    <-> { bi-directional current flow }
    -> { uni-directional current flow }
    <- { uni-directional current flow }
}
main {
    positive_busbar {
        004|UUU|<->class_t_fuse<->battery.positive
        004|125|<->growatt.positive
        016|001|->shunt.positive
    }
    negative_busbar {
        004|UUU|<->shunt<->battery.negative
        004|UUU|<->growatt.negative
        006|UUU|<->growatt.equipement_ground
        004|UUU|<->earth_ground
    }
}

 

[John Frum]

Look at step 10 https://www.victronenergy.com/upload/documents/Quick-Install-Guide-SmartShunt-EN.pdf

 

[Rednecktek]

OK, so it goes on the load side of the shunt. Thank you!

I knew the shunt went between the Battery-NEG and any loads, I just wasn't sure if the SCC was a "Load" or not and if the SCC-NEG would go directly to the batteries.