I just installed a new BP-100 on a boat with 500Ah 12V AGM battery bank. Wiring is battery bank -> main battery switch -> 100A breaker -> BP-100 -> main sub-panel. System worked OK before installing the BP-100. Load is <2A, all electronics (telemetry, alarms, meters).
With no load connected the unit powers on OK.
If the output is connected when it is powered on, then it shows an E1 short circuit code.
If the output is connected after it has powered on, no code is displayed and the main panel powers up. If the 100A breaker is turned off then on, E1 is displayed again; the same if the remote switch on the BP-100 is used to turn it off and on.
It seems like the problem occurs if the unit is turned on with any load whereas it is OK if the load is added later. Has anyone seen anything like this behaviour? Should I suspect the unit?
[update] I temporarily installed the unit next to the battery hard wired with 40cm #2 cable and initially had the same problem. I then tried loading it by turning on the fridge with its 5A motor load and found it would start when I closed the remote's contacts. Turning off the fridge (returning to just the meter loads), it continued to start; this is back to the same loading as before when it wouldn't start. I plan to monitor to see if this remains consistent.