Originally Posted by Trevor43
If you voltage was 13.6 while being charged by the converter.......your battery is on the way out. Should be more like 14.4 or better while it is being charged.
13.6 is the absorption mode for the WFCO converter.
Absorption Mode: During this mode, the converter output is in the
13.6 Vdc range. This is the normal operation mode. This mode
provides the 12 Vdc and current required by the 12 Vdc RV appliances,
as well as slow charging the battery.
Bulk Mode: 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.
Float Mode: If the RV is not being used for approximately 48 hours,
with a “no load” condition and the shore power is plugged in, the
converter will automatically go in to the “Float mode.” In this mode,
the converter is charging the battery with a trickle voltage of 13.2 Vdc.
When the converter senses a demand (by turning on lights), the
converter automatically returns to the “Absorption mode” 13.6 Vdc.
The 12.3V during operation might be high, but that motor does draw a lot. I can say that watching my meter inside the trailer, if I have 12.6 showing as stabilized voltage, if I turn on the propane heater and water pump for a few seconds it can drop to around 12.4, but when the pump and heater are turned off it pops back up to 12.6.
When the draw is stopped, this is due to the infusion of the acid in the battery.
So a drop to 12.3; might not be abnormal, depending on the draw of the motor.