Just a warning not sure if it applies to your converter
Some actually many of the converters with a remote control aka pendant
consume a small amount of power from the battery all the time they are connected to the battery. Just something to think about
FWIW, my PD9160A with Charge Wizard draws between 3 mA and 7 mA. The rate appears to be determined by the CW's mode which in turn determines the duty cycle of the green LED. That puts the battery discharge between about 2.2 and 5 Ah per month. For comparison, my battery monitor pulls out 6.4 Ah per month, and the self discharge of a 2x GC battery using the common 5% per month rate is 11.25 Ah per month.
Bottom line: The battery draw of the 9160A+CW is IMO a nit. One detail that PD did a very good job with.
