IP65 Smart Shunt & 2 bank Minn Kota Precision charger to 2-12 volt batteries in series

Suburbanfrog
Thu, 02 Apr 2026 22:26:20 +0000
DIY

I am wiring a IP65 Smart Shunt to my boat trolling motor batteries. I have 2-12 volt 100 ah Dakota Lithium batteries hooked up in series for a 24 volt setup. I have the ground from my trolling motor hooked to the LOAD MINUS side of the shunt. I have a negative cable hooked up to the BATTERY MINUS side of the shunt going to the Main negative terminal of Battery 1. I have a MID POINT cable hooked up to the positive post on Battery 1 going to the negative post on Battery 2. I also have the AUX (grey wire) from the shunt hooked up to the positive on Battery 1. Next I have positive wire from trolling motor and VBATT+ (red wire) hooked up to Main positive post on Battery 2. I know I should hook a positive cable from Charger Bank 1 of my 2 bank MINN KOTA PRECISION 12v charger to Battery 1 and the positive cable from Charger Bank 2 of my charger to Battery 2. Here is my question, Do I hook up both ground wires from the Charger Banks to the LOAD MINUS side of the shunt as my Victron instructions indicate OR do I hook up Charger Bank 1 negative cable to LOAD MINUS side of the shunt and the ground cable from Charger Bank 2 to Battery 2 negative post as I read in a Victron Community post from 2023 by pwfarnell because the MINN KOTA charger is 12 volt only and not 24 volt and has separate circuits? Could someone please clarify this for me?

3 posts - 2 participants