Hi
I have just installed two 315w panels each with its own MPPT 100/30 charge controller and a battery temperature sensor. I have pretty good sunlight and the batteries are fully charged. Using Victron Connect, I see that one panel is putting out about 120W, and the other is zero. The panel with zero output shows voltage, but no current. If i put a load on the batteries, both units kick in. My guess is that synchronized charging may shut down one controller if there is excess current? Is this correct? I cannot find an explanation in the user manual.....but mayme i am looking in the wrong place. Tomorrow, I will sail the boat and see what happens when the batteries are put under load and discharged some.