My 10 years old Newmar PT-24-95W stopped working this week. It has power going to the charger but it's dead. It's charging three banks of Group 31 97ah gel batteries. Newmar thinks it's the power supply and they can fix it for $640 plus my cost to ship to California. I'm thinking it's not worth putting $700 into an old charger. Looks like replacement options are Newmar, Mastervolt and Victron. Victron 100 costs substantially less than the other two. Welcome opinions.