Charge Voltage to Battery

The voltage out of the converter is 13.6, your battery voltage if fully charged and rested typically drops to 12.7 or less depending on the age. Have you tried a battery smart charger? Wet cell - does it need water? When was it last fully charged?

My WFCO WF-8725 converter on my 2018 T@G is designed to put out 13.6 Vdc in Absorption Mode, 14.4 Vdc in Bulk Mode and 13.2 Vdc in Float Mode.
If you have questions about the converter, WFCO is very responsive and knowledgeable when you communicate with them.

2021 Aeroplex Dr. North
Elkhart, IN 46514
Call: 574-294-8997
Fax: 574-294-8698
technicalsupport@wfcoelectronics.com