you need to adjust the Generator Qualification settings, Voltage window and Frequency window. 52 - 67 Hz (or whatever you choose) and 95-130 Volts
Factory settings are likely only a few Hz wide, same with the volts.
I'm on travel right now, wife is running the system in my absence, I topped off the battery water before I left and she's in charge - just like normal !
I'll look up my settings when I get back after easter and if I remember to see this thread