Honda 2000i generator amps surging up and down

The OP has not told us what his monitor considers 100% charged. He is at 78% of who knows what. From the factory, the Victron monitor says 13.2v and a 4% tail current is 100%. That is way too low IMHO and deceiving. In my case, that would mean being down almost 17Ah from what I and my PD converter consider to be full. The monitor only knows what we tell it.