Is battery needed if RV just stays in one place plugged in?

[Nair2well]

I just got this Crossroads Longhorn 2014 RV and there was no 12v battery in it. It'll always be plugged in. If the power goes out there's a backup generator system in place for the overall area. Is the battery needed to make other things in the RV work correctly? Thanks.

[dagst1]

Find the manufacture of your converter and check with them or in your manual. We have a WFCO 9875 deck mount and the paper work states it can be run without a battery.