II have ridden it many times pulling the max amps the controller will give which as I remember is 24a(label is too faded to read) so its pulling 1000+w. Doesn't seem to bother it. My main concern is the gears in the hub, l assume they are plastic so I apply the power gradually. I like to run it full out on a fresh charge(50v). It pretty quick then.Been riding this bike as a errand runner for several years with out issues. Its my favorite Ebike.I woulnt try pushing it past 600watts