Ammeter/ Volt meter adjustment

BFL13 wrote:
You probably know, but when you use the portable charger, its neg clamp goes on the outer end of the shunt same as where your chassis ground wire is, not on the battery post end of the shunt. Or you could just put the neg clamp to the chassis (frame) somewhere and the neg path will go to the outer end.

I did not know this. I charge my batteries inside of the MH off my pos and neg posts of the inverter under my dinette seat. I just plugged the MH into shore power the resting volts where 12.58v and the amps when from -.3 to 0. So with my old Magnatech converter it is charging at 13.06 volts and .3 amps. I will try your setup to the frame with the B&D charger.