cleartorotate, in what phase does this occur? Is it just after start as the gennie comes online at gnd idle or at flt idle? Do you start with a GPU or not? If you do use GPU does it happen with a batt start as well as a GPU start? During the start what is the voltage drop ie 24v before start dropping to 19v? Do you start with the "GEN" selected? Sorry for the questions but there are a few variables here.