Battery Monitor shows negative volts

[Magicjack]

I installed a 200 amp lithium battery, 2000 watt inverter , 40 amp MPPT and 20 amp MPPT with a battery monitor shown below but there is an error in reading voltage, amps and capacity. The MPPTs increased the voltage from 13 volts to 13.7 volts but the amps show negative. The MPPT shows positive amps. A photo of the shunt is attached. the negative battery is connected to the B terminal of the shunt and the other side is connected to the rv frame ground and the negative terminal block for all other negative lugs. I have no idea what I did wrong or is the battery monitor defective. I used an identical monitor on my DIY power station which works correctly. Any ideas?

 

[740GLE]

What goes in, goes out.

So in the pictures the only thing connected to the shunt are the MPPT and the battery and you’re charging the battery with 18.37a?

What does the shunt say for “load” and “battery” terminals, my guess it’s just a simple polarity issue of the shunt.

 

[Bob142]

I have no idea what I did wrong

my guess it’s just a simple polarity issue of the shunt

I agree. Compare the manual diagram to the photo. Seems like you have it wired backwards.
With the shunt power connection facing up, as seen in your photo, the battery (B-) terminal is the one on the left.