I think you have made the right choice by getting rid of your Paralax converter.
In the frist three years that I had my coach, I went thru 3 Paralax converters.
First two just up and quit while I was dry camping in Quartzsite, and the third one malfunctioned by putting 16V AC on all my DC circuits--fried several items! Ouch.
Since I replaced the Paralax with an Intellitec 9200 (or something like that), I have had no further problems, and I sure like having a three-stage charger.
Give yours a try for awhile and see what happens.