Wired1. I have two suggestions 1. If you have, or can add proper metering (shunt/BMS/hand held VOM/clamp on etc.) to measure the actual voltage and amps just simulate a black-out. Use various time durations and loads on the system and see what the charger actually does at restart and later. 2. email PD with your specific questions about your pre modifications (multi charge rate upgrade) charger or maybe yours is the newer version?
The PD OEM description needs to be disambiguated (at bottom). It looks like at startup the newer version of the charger (that you have?) adjusts its output from 14.6 VDC and eventually goes to a 13.6 VDC "idle" or maybe that also get "adjusted" ? No matter what we assume, guess, surmise or ferret out here on the forum, meters attached right to the batteries will be better.
"When power is initially applied at the converter/charger DC terminals, the Charge Wizard (CW) will run a startup routine then begin providing a 14.6 VDC charging voltage to the battery. The CW will begin to monitor both the current and the voltage of the converter to determine the correct output voltage required. The charging will continue for at least 1 hour. If the current generated from the converter remains high, the charging will continue for up to a maximum 8 hours. Once the charging current drops off or a total of 8 hours has transpired, the CW will reduce the output to an idle voltage of 13.6 VDC"