Your new AGMs depleted to 12.2 resting, will still suck everything the power supply can make, if you cannot lower the output voltage of the power supply to very close to that 12.2, then dial it up slowly until the generator starts struggling.
My Meanwell goes down only to 13.12v, not sure about the MegaWatt.
Either of my group 27 or 31 batteries will take 40 amps, but briefly, when the PS is first hooked up in the 85 to 90% charged range, even when set at 13.12v.
My watt meter records peak amps and minimum voltage.
