You will want to get a smart mode converter/charger unit...
ALot of folks have problems with the WFCO products ever going into smart mode charging... I would replace your WFCO unit with a Progressive Dynamics or IOTA unit that will always work in smart mode when required...
If the charger never goes into smart mode charging it will remain at 13.6VDC and is known to boil out your battery fluids resulting in battery failure unless you do a very regular Battery maintenance inspection routine...
Read up on the WFCO products not going into smart mode sequences...
Roy Ken