After some support interaction with Ecoflow, they state above is possible. I can both use and charge with an 850 watt ALP generator or even something a bit larger like a Honda 2000. This is very appealing to me for grid down as I can ration power in the home to about 600 watts and then also charge at 850+ watts. Net gain and also handle short load spikes in excess of 850 watts (make coffee, use microwave, etc.). Very appealing to me although adding solar panels vs. small generator has its appeal too.