Background: 8 months without issues, 2x 150w panels & 1x 100w panel in series, 40a MPPT charge controller, down to 4x 100ah gel batteries in parallel.
Was diagnosing why my battery isolator wasn’t working when I was driving, so I had disconnected batteries, etc, looking at voltages at various points in the system. Cleaned off terminals, hooked everything back up. Now it seems like the highest voltage the batteries display while charging is ~13.3v (~7a), compared to previously, when they’d show ~14.2v.
Solar output seems the same (ballpark of 51v, 2.X amps). This happened just a couple days ago. Gel setting on controller hasn’t changed.
Any ideas for what to troubleshoot? Voltage at controller and battery terminals is the same.
Was diagnosing why my battery isolator wasn’t working when I was driving, so I had disconnected batteries, etc, looking at voltages at various points in the system. Cleaned off terminals, hooked everything back up. Now it seems like the highest voltage the batteries display while charging is ~13.3v (~7a), compared to previously, when they’d show ~14.2v.
Solar output seems the same (ballpark of 51v, 2.X amps). This happened just a couple days ago. Gel setting on controller hasn’t changed.
Any ideas for what to troubleshoot? Voltage at controller and battery terminals is the same.