I am a licensed electrician and I installed a 5000watt Reliance generator transfer switch for a friend, I put the master bedroom , fridge,well pump,furnace,and family room on the gentran switch,powered it with a Generac 5500watt generator, everything seems to be fine,except that when I power up the master bedroom with the generator, the 120v smoke detectors go into alarm,everything else seems to work fine. The house was built in the early seventies, and the smoke detectors were made by Bittenhouse.I can not find a reason why the smokes would go off under the generator power, any ideas?