I just bought a 3 bank promariner sport 20HD 4th gen I plugged it in for the first use and it charged my 2 trolling motor batteries and my starting battery. I took the boat out used the trolling motor a bunch and when I came home I plugged the charger back in and it now says my batteries are full. I unplugged it and plugged it back in a couple times and it still says the same thing. I unplugged the charger then unhooked all the leads plugged the charger back in and connected all the leads one by one with the charger plugged in and it finally started charging. I was wondering if anyone had and insight on this before I go through the process of returning it. My flooded batterys are a bit low on fluid I don't know if maybe my batteries are pooched or if it the charger is defective.
Any help would be great thank you!
Any help would be great thank you!