For whatever it is worth My PD9260C does this alittle different.
I use this three meter arangement inside my trailer to monitor my three 85AH Interstate battery bank.. Bank 1 has two 85AH in parallel and bank2 has only one 85AH battery in it. This is my total of 255AHs parallel battery capacity

At 8AM I am usually reading around 12.0VDC on both meters and my current meter is reading a minus 1AMP or so.
When I start up my 2KW generator to power up the PD9260C the two DC voltmeters jump to around 14.4VDC and my DC amp meter goes to positive 53-54 amps. The DC VOLTMETERS remain at around 14.4VDC.
I will draw the 53amps DC for about 10-12 minutes and then it starts slowly dropping in current and in about 20 minutes or so it settles out at around positive 6-8AMPS DC. It will stay at this level for around two hours total time and then the PD9260C switches down to 13.6VDC. My current meter drops maybe an amp when this happens. This mode will continue for about another hour.
After the total time of re-charging for three hours I can switch out my battery bank from the trailer and my panel DC voltmeters will read around 12.6 to 12.7 VDC. When i shut down my 2KW generator and go back to batteries the DC VOLTMETER panels reads the same 12.6 to 12.7VDC and you can notice a .1VDC drop start occurring as the day goes on. I usually get to run my 2KW generator again around 4:30PM to 7:30PM each evening before I really start drawing alot of DC current for the evening HDTV and other 120VAC items being used from my 600WATT Inverter as well as my direct 12VDC items directly connected to the batteries. The game plan of course is to have around 12.0VDC battery capacity at 8AM the next morning so I can do all of this all over again...
When hooked up to shore power I very seldom see the 13.2VDC readings coming out of my PD9260C converter/charger. My current meter very seldom drops below 1 amp when all is normally hooked up running off the batteries. The DC voltmeters always seem to be reading 13.6VDC.
Have observed these readings just about everytime we go camping off the power grids???
Roy Ken