I've kind of done a 180 on my thinking about 1 wire alternators. I had been a defender of them, saying all the BS about how they can't work is just that, BS. I had one on my Jeep for years, and also on several boats, and they worked well. However, I now have to admit the Powermaster one on my current T is a slight disappointment.

Oh, it works and the battery stays charged (it is a 100 amp model) but at idle the voltmeter gets down a little until I touch the gas and then it will pop up a little more. Highway speeds are fine, 14 volts or thereabouts. I can actually watch my headlights dim at traffic lights, and brighten when I increase the rpms. That surprised me, as the Jeep never did that. However, the one on the Jeep was a marine alternator that I adapted, so maybe this problem is just a Powermaster issue?

But otherwise, it is fine.

Don