When I use my Inverter Generator for charging my battery bank with 80A, I am pulling 120V/23-25A or roughly 2700-2800W from it. This also allows for PassThrugh power which is above & beyond. Because mine is a 5500W Peak unit, that never runs it too high. Now I am using the L5:30 to connect from Genset to Powerhouse. The Samlex EVO is very efficient, much like Victron, other brands vary a lot, especially between product tier levels.