My 2012 Sabre 31 RETS came with a basic WFCO, either a 45 or 55 amp. During our third trip the fan on the converter went out, had to go buy a basic battery charger to keep the battery charged. Dealer replaced under warranty but I paid additional to get a Progressive Dynamics Inteli Power 9200 / 70 AMP. It is my understanding the Progressive Dynamics products have a good track record.
I would hope that the Columbus would come with a better converter than a WFCO.
RV Power Converter/Chargers