Dene, have a look at this http://www.zefox.net/~bob/mc/vfr/alternator.html
PMAs are difficult to regulate by themselves and when connected in parallel can interfere with one another. Running with both batteries together should only be in an emergency or for extra grunt for starting. In any case I would recommend isolating the PMAs from "seeing" each other. I would disconnect one PMA when running the batteries in parallel using smaller relays operated by your bus tie switch. You could try to isolate/protect them using a bunch of diodes but I don't know how successful that would be.. Hope this helps a little. Paul Smith Brisbane, AUSTRALIA pk.sm...@bigpond.net.au http://kr2spacemodulator.blogspot.com/ -----Original Message----- From: Dene Collett Subject: KR> Revmaster alternator question equipped with the dual, permanent magnet alternators. After a few hours of using one of these, I had one of them burn out. I have two master solenoids which can select any of the two batteries or both at the same time. When Both batteries are selected, the two alternators/regulators are electrically in parallel. My question is: Is this a problem?
