The 4 mppt units connect through a powered usb hub and the hub is not losing power when the interruptions occur. Could there be some type of electrica interference causing the interruptions?
Please be a bit more specific, drop out in what way. They could stop charging if the alternator charges the battery at a higher voltage. Alternator interference could also be an issue as could vibration on a loose connection.
Yes, more information is definitely needed. One shouldn’t try typing a forum question at the end of a 10-hour cruise. In this case my 48V LFP battery bank is not connected to my 2 engines and gen set. So when underway, the only chargin source is the solar panels. They run on their own 12V AGM batteries and their respective alternators only charge the AGMs. By drop out, I mean that the Cerbo display no longer shows Solar in the bottom right box (just empty) and the device page shows all 4 of the mppt as ‘not connected’. Some days they will come and go on the Cerbo and others not. Some times dissconnecting the usn cable at the Cerbo itself brings the connections back and sometimes not.
Sounds like a problem with the USB hub.
Try another hub or try to connect the MPPTs directly without the hub one by one.
It seems that although the mppt units show they are disconnected, that I still get some charging out of them. The SOC moves up nearly 10% over the day. I guess one or more mppt is working even though it says disconnected. Here in the Sea of Cortez I will have to look for a new usb hub and cable. Thanks.
Like Matthias said, plug one or two of the solar charge controllers into the VE.Direct port of the Cerbo GX. That would help rule out the USB hub.
How long do the units drop out? Can you still see them in the VictronConnect app?