Just a possibility, and a brief discussion of my issue and resolution:
I have the 100|50, and it invited me to do a firmware update.
I did and my ability to reach it went away. Counsel told me to disconnect the battery lead and try again.
Success.
Then, later, I got minimal energy transfer; I dunno why that might have been. But...
I'd installed a switch (actually a spare breaker) in the positive incoming line. I already had a fuse (large blade fuse) in the battery positive.
After laboriously (they're mounted on an arch; I used a
bosun chair climbing rig to sit under them) opening all the positive connections (first throwing the breaker to 'off' so there was no energy to the controller), and metering the voltages in open circuit, and reinstalling the leads, re-energizing (breaker back to "on") the positive lead, and checking the amps with a clamp-on meter, I was no further ahead.
However, the next step was to (first again de-energizing the controller) remove the fuse and reinsert it, then re-energize.
Problem gone. Solar now performing about as expected, albeit apparently both my Xantrex 2000XC and
Victron chargers have a higher opinion of the state of charge on my nominal-870AH bank than my early
Balmar SmartGauge, as they march through the bulk stage (even when I'm down - per my amp-counter Trimetric gauge - over 200AH) nearly instantly, leaping to absorption. Yet, they both rarely reach float. And the
Balmar usually thinks it's at 100% much faster than the TriMetric. So, hoonose.
Anyway, back to your situation, disconnecting the battery under charging amps is a bit off-putting if not a great deal on the
panels, so if you don't have a switch in the incoming line, I'd wait until dark before testing this possibility.