My intention is to monitor charge/discharge to my RV’s battery systems through the polarity of the current flow.

I bought a few meters that only report positive current, and hope that some of yours will report neg as well.

I already have shunts installed, and just need the meters.   0-500A for the start battery, -50…0…+50 A for the house batteries.

Which of your models should I consider?

Thanks, Eric