I have an inverter for my solar system that will not operate at a V aboue 55V. My solar panels put out about 65V when they are really cooking and this will shut off my inverter. I cannot reconfigure the solar panels for several reasons. I want to build a dc to dc buck system and I have irf 2011 and IRF 540n fets. I would like to operate the system with an 8 pin picaxe in pwm mode. I notice that all the application notes for the irf2011 show a high and low fet. Can't I just use the high side and a few fets in paralell to handel 600W?