Originally Posted by archham
Sounds like he needs to have the battery checked and then the converter?
I suggest he do both before connecting up a new battery. If the converter was stuck in BULK (Fast Charge) and it did wreck the battery; it will wreck the replacement too.
When the converter senses that the RV system voltage is less than 13.2 Vdc (equivalent to less than 50% of battery charge) the converter will automatically go into the “Bulk mode.” In this mode, the output voltage of the converter will switch to 14.4 Vdc for a maximum of four hours. If the converter cycles between “Absorption and Bulk mode,” there could be a shorted battery cell or other issues.
If the output voltage drops below 13.2 Vdc, the converter automatically changes to a “Bulk mode” 14.4 Vdc (unless the converter is in overload condition).
There are two signs of an overloaded converter:
Low output voltage, and full converter "fold back" or shutdown.
In both cases, the converter will automatically turn ON, once the complete load is removed. For low output condition, removing the extra (over the current rating) load will be sufficient. If it is impractical to remove all the load, resetting the main breaker will have the same effect.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW