I have gone through the following page:

http://copter.ardupilot.com/wiki/common-optional-hardware/common-powermodule-landingpage/common-using-a-pixhawk-with-6s-batteries/

I am still having a problem getting my Voltage telemetry correct.

I am using  180A Attopilot module connected as "Wiring Case 1" from the above article. In the Battery Monitor section of Pixhawk I am set it to:

Monitor- 4: Voltage and Current

Sensor- 0: other (if i set it to AttoPilot180 is just sits around 1v and I am not able to change the Measured Voltage)

APM Ver- 4:Pixhawk

When I enter my Measured Battery voltage(24.3v in this case), my Battery Voltage(calced) will bounce around +/- 1.5v both ways and everything inbetween.

I have been trying to figure this out just by reading and I cannot get it right... Any help would be greatly appreciated.