PowerMax PM4 100A actual current

[RT-NY]

I think that this has been discussed before, but what kind of actual output should I expect from the PowerMax PM4 100A charger? I have read that it puts out around 80 amps. I am aiming to charge a 150AH LiFePO4 battery pack at around .5C. I am sure the 75A PowerMax would work fine, but I would like to speed up charging a bit if I can do so without radically shortening the battery pack's life. The manufacturer says maximum 100A input but recommends 75A.