I have two MPPT 100/50 controllers charging a 416 AH, 12v LiFePO4 bank. They have been working great for a few months, but in the last few days I keep getting high voltage alarms from my inverter and my Balmar SG200. I am not plugged into shore power. My only other charging source is a converter which is not plugged in.
The Voltage Graph from the charge controller shows a spike to over 16 volts. The Balmar records 16.4 volts. Both charge controllers are set the same.
What could cause the voltage spike?
