Time to charge a bank of 8 6v batteries using a generator

I inquired earlier today regarding the pm3-75:

Jrnymn7: Hi, are the powermax pm3-75 units you sell PFC?
(I noticed you have two separate listings for the pm3-100's, pfc and non-pfc.)
Thanks!

AdventureRV: The PM3-75 is not PFC. The PM3-100 and the PM3-100 PFC are 2 different units.

They appear to think I can't figure out the two 100's are two separate units? Anyhoo, they claim to have pm3-75 and 100's that are not pfc.

And if the 75 IS non-pfc, then what will it draw, if the 45's are near 10a ???