What is an HEP generator?
HEP stands for Head End Power. A HEP generator is what powers the lights, heating and air conditioning, doors, etc. on a coach. I don’t know who invented it, but I know that GO Transit was among the first to use it: Amtrak didn’t start until about 1980, 13 years later. A HEP generator can either run off of the prime mover, like the F40PH’s, or off a separate engine, like on the GP40TC’s or F59PH’s.
