Thanks for the replies. I will check the dip switches and see if they are set correctly. I have a mastervolt MICC monitor
with a shunt right at the batteries. They eventually get up to 14.1 and then go to float. Its just that it takes a long time and they do not accept the full available output. I also charge with two 60A alternators, which also never seem to put 60A in but that may just be the nature of these alternators. I have 720w of solar
and all of that seems to go in, but its never very much to begin with. I have two 80a 220v/50hz mastervolt chargers. (this was originally a european boat). They run off the diesel
genset. (The generator I mentioned in the original post was a Honda
2000w 110v generator I borrowed to test the charger.) These two chargers act similarly - ie, when the batteries are low, their combined output initially jumps up to around 140a, but quickly drops to below 100a, even when I think the batts should take the full output. Is this how batteries act when they are getting old? They do eventually take a full charge and discharge normally.