A method of cooling electronics of an alternator includes mounting the electronics onto an electrically conductive electronics chassis, and electrically connecting the electronics chassis to a positive DC (B+) output voltage terminal of the alternator, whereby the electronics chassis is electrically insulated from ground potential and thermally conductively isolated from the alternator housing. An alternator includes the housing at ground potential, the electronics chassis at B+ potential, and the mounted electronics. The electronics chassis is electrically insulated and conductively isolated from the housing. An electric machine includes the electronics chassis having an electronics mounting surface, and a convection surface, and defines an electrical bus for conducting a B+ potential. An electronics chassis assembly has an insulator secured between the housing at ground potential and the electronics chassis.