I'm looking to build out a semi-off grid system for a cabin. I have a 2000w generator I'd like to use to feed the inverter/charger to assist with the battery charging. The datasheet indicates that it'll draw significantly more current than the generator can provide. Can the charge current be adjusted down in software? I see recommendations for buying a standalone AC charger, but that seems silly. I'm looking at the GroWatt SPF-3000 unit.