Welcome to the IRV2 forums:
You are lucky, our 99 Gas Endeavour converter/charger lasted all of 4 years, that original batteries actually lasted on one year from Sept.98, a coach we special ordered. Could not get battery warranty coverage, OEM of battery said it was expired, HR apparently bought a hugh quantity and installed them late.
HR also refused to assist.
By the way our converter replacement was a Progressive Dynamics 9060 with the Charge Wizard, great little option, it would equalize the battery's automatically every 21 days, sold our Endeavour in April, the battery's were 11 years old and still going strong.
Edouard: 2008 National Dolphin DL35C.
W-24 Chassis, Allison 2350 MH Pushbutton Tranny, Searching for a Tow Dolly. 2013 Kia Soul Toad.SGII-X Gauge