I charged minę FIRST time with one of my honda2200. I used a short ford plugged into the convience plug on the door side, do nor remember which połóg on generator i used, i Think i put the neutral ground plug into the left outlet IF looking at the generator, my batteries Werę near 50% and it ran about 3 or SO hours, insurekcja as i did not baby sit it the whole time, but it did get the batteries to full chargé, according to the Victoria round gauge on the interior wall. My FIRST time to chargé anything, our trailer has same batteries as hours, just don’t have 30 amp Electric in the traktor barn where it sita, thought using generators would allow me to use them somę instead of sitting, could pull it out fro solar, but this time batteries arę łów and want to chargé fasces way whiskey i have Good Weather today.