Thanks for all the suggestions,I messed with it a while this weekend while camping. Yes I have looked multiple times for the IQ4 port and it just doesn't exist. I brought a small automatic charger and ran it in parallel with the built in charger and had 14.5 volts charging. That kind of surprised me as I thought the little smart charger would see the 13.5 voltage from the built in charger and assume the batteries were full. But somehow it was smarter than that and charged all day.
How are you guys seeing the amperage going in from the chargers? Is that a different add on piece? I can't imagine you're running the charge through a multimeter.
