Adding a shunt to my home made solar system I have two banks of battery’s with a switch to keep separated (bank 1 Lifepo4 24V) (bank 2 LeadAcid 24v)Shunt Vbatt+ to what rocker is at(bank1, bank2 or both Shunt aux + on bank2 if rocker switch is on bank 2 both Vbatt + and Aux will be powered from same bank2. Will this config cause any problems?? I dont want to harm the shunt
Aux terminal is only for voltage monitoring of an accessory or starting battery. It wont give you any other data or info.
A smartshunt or BMV needs to be configured to your specific battery bank size and chemistry. If you set it up for your LFP bank it will be inaccurate for your LA bank or vice versa.
Theoretically you could set up a negative bus with a 3 way disconnect and two separate shunts for each bank.
Just need to know if smartsunt can be connect to battery + (short term) to both vbat+ and aux at the same time so to charge bank2 I only need to know voltage on bank2
I’m not sure I follow. Are you trying to monitor bank 2 with the shunt that is already connected to bank 1? Perhaps a good read of the smartshunt manual will give you a better understanding of what it is capable of and how it needs to be wired.
I have a rotery switch A is Bank1+ B is Bank2+ C goes to (Load, Charge) C also feeds Vbat+ I Would like to monitor Bank2 Voltage using Aux on Shunt but if rotary is on B (bank2) both Vbat+ and aux will be feed + from B (bank2) I need to know if this will HARM the Smartshunt 300? I use B (Bank2) for backup and would like to see in app Aux
I use B (Bank2) for backup and would like to see Voltage in app Aux
Bottom line If I hook Vbat+ and Aux to Battery + will it damage the Smartshunt 300
They are meant to connect to battery positive. So I don’t see why it would damage it. Vbat + powers the unit and Aux is just a voltage sensor.
Both Vbat+ and Aux+ can be used to monitor up to 70VDC in regards to their common negative. It doesnt matter if Aux+ comes from the same or another battery, or even something else entirely. The only important thing is the common negative and the 70VDC limit