Originally Posted by jukesy
I had a similar problem at a marina with my xantrex. I found out that you can set the low voltage point in the inverter ( at least my model). It was set to not work below 110. It was recommended to me to set it at 90 volts. I did and have not had a problem since. Could be a possibility?
99% this is the problem. When the inverter comes on line, the voltage is fine. When the battery charger kicks on, the load causes the voltage to drop below the threshold. Battery charger turns off. Voltage comes up. Repeat.
Two solutions: 1) adjust minimum voltage to 100 2) Adjust max charger draw down to 10 amps.
Long term, find out why the dock voltage is too low.