A new converter should correct the problem and possibly increase the battery life too. You can always store the old charger for a back up or other project you may have one day. Good luck and keep us posted on the results.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7