I've had this unit for almost a year plug into the batteries (no solar) I just got the panels installed and plugged in verified the panels are out putting 130v and when I connected it to the mppt through it's connectors the system shows no voltage coming in
I have trying swapping the polarity and same thing. I've updated firmware just B4 first time plugging in to solar. Why won't the mppt recognize the input from the solar.