Could just be a loose connection with one of the plug connectors. I'd check all them you can find.
Mine did act up once I remember and I turned it off waited a bit and turned it back on and been good for a year so far with no issues. I did check all my connectors but hard to say if I found one loose.
2014 Palomino Columbus 3650TH
435AH 12V VMax Charge Tanks, 520 watt Monocrystilline Solar Array, Morningstar MPPT TS-60 CC,Morningstar Remote,Cotek True Sine Wave Inverter,Cotek Remote Controller,50amp Progressive Hardwire Surge Protector
2015 Dodge 3500 6.7L 4X4
2011 CanAm Commander XT 1000