question

Sounds like the load is somehow managed which is one of the options. Kinda sounds like off at x voltage, on again at y voltage. Make also sure not to use Battery life algorithm.

You can play around at home in the demos of your Victron Connect app. If its default its probably on one of the programs.

Battery Life is somewhat smart and might come to incorrect conclusions for your application. Your battery might have one cell damaged which is hard to find while sitting there and having it charged. One cell is 2 Volts that suddenly disappear. Couldnt believe it when I saw it either. It works fine for hours and within minutes 2 Volts are missing and everything stops. Had a beautiful picture of that on my logging. Voltage goes under threshold at night and reconnects after the sun came up for a couple of hours.

Verify its set to always on or wider margin to confirm.

Next thing, since you are sure of the times and you cant know that off Victron Connect, there is probably a device sending information running off that load output. Maybe the load out is never off, but the battery voltage due to a faulty cell or whatever the reason has come down enough for your machine to stop working.

I also had trouble With the short current detection of that load output before. It monitors steep inclines in current draw and turns off the load output. Is your connected machine doing anything like switching on something with big capacitors.? One empty usb plug thing is sometimes enough to overload a 10A rated load out.

In that case, it goes off and tries again and goes off right away again all night long. Again with higher voltage and therefor lower current it might be able to finally do whatever needs doingor till you come and completely reset and possibly not switch on the offending piece of equipment.