I'd set meanwell to 14.7v until amps accepted are less than 0.4, but I would also prefer to know the size/ ah of the battery before deciding on 0.4 amps but I am assuming a group 24 of less than 85AH capacity
And i would never ever waste fuel idling an engine to recharge a battery, as its voltage regulation is likely only seeking 13.6v, and 1/3 the amps flow at 13.6 vs 14.7.
Idling to top charge a battery is unwise in the extreme, to put it kindly.
AGM restig full charge voltage is usually 12.85+
My Northstar AGM is 13.06v, but I could not get it up there until I did a 50% discharge and recharge at 25+ amps.
