Ihope It is,
but I would suggest try using one 120-140amp battry and other one 85amp as yu stated.
because to my concerns Iwas having a single 185amp wid load of one side 4fans and 6energy savers.IKVA is UPS is designed to handle such load but with a single 185amp It never worked.
you can gor for 85amp 2 batteries aswell as yu have lesser load, but do one time thing, make sure you have one larger battery and one shorter for the backup and make that sum up of total 225amp or 230 amp. Do ask your UPS provider to.
are you going for conventional ones?