Welcome from Wisconsin. Since your new to the RV lifestyle take time to read the info given in the following post by one of our more knowledgeable members. New to RV's helpful hints
It has lots of information on battery power, converters, inverters, and other systems in your rv. Be sure to read “12 Volt Side of Life” which is noted in the above link and can be found in the Library section of the forum.
I advise you to familiarize yourself with the Library section (light green bar at the top of each forum page) as it contains many rv appliance owners and service manuals.