John Wayne wrote:
Are you sure everything works when you are plugged in to shore power what is the voltage at the battery posts should be around 13 volts or better, If just 12.5 or so your converter is NOT charging your batteries they will run down till your in the same boat you started with.
This is wonderful advice.
time2roll wrote:
Verify the new battery holds about 13.6 volts when plugged in several days.
Actually, the battery is not holding 13.6v. The converter is putting out 13.6v. A battery will not be over about 12.8v unless on a charger or briefly with a surface charge.
A converter putting out 13.6v continuously is a battery killer. It is a single stage charger and will boil batteries dry. A good converter/charger is 3 or 4 stage. It will charge at 14.4v to 14.8v for a few hours to get the battery back to 90% charged, then drop to 13.6v for up to a day to get the battery back to 100% charged, then drop to about 13.2v as a trickle charger to keep the batteries topped off.