The little 1000watt clean power gennies produce 12 volt power then invert it to 120 volt. It would be great if we could use the 12 volt to charge batteries but it's uncontrolled. It can "cook" your batteries. I don't know if anyone puts a charger circuit in a little genny. So you have to run your power through a charger. Some trailer converter/chargers are better than others, and may have low output as a charger. So a new smart adjustable charger would work better. Or with a 1000watt nominal,you may have to adjust your load down, so you may need an adjustable anyway if your charger is a HD.
These are just what I learned and experienced.
