Not sure if I wired up my battery monitor wrong or my shunt is faulty. I want to measure the voltage of the starter battery. I have the postive cable on my starter battery and it's plugged into the B2 of the shunt. The negative of the starter battery is connected to my mppt then goes to my shunt on the load side. On my display it shows 0.03V (pretty much zero). I have checked the settings and it's set to starter battery. If I switch the B1 and B2 around my voltage changes and is roughly correct when I check it with a multi meter.
Is my wiring correct or have I wired something wrong or is my shunt faulty?