If voltage and/or current measurements do not match the values reported on the TriStar meter (or values reported to MSView)
Measure the voltages directly at the TriStar terminals. Voltage drops due to line resistances can be significant.
Be sure the Battery Sense wires are not wired to the RTS(remote temperature sensor) terminals. Both terminals look similar and are easy to mix up.
Check for correct polarity at the Battery Sense connection.
Confirm your measurements with another multimeter.