Originally Posted by jumpshowhigh
If you go with a perfect switch battery isolator, they're universal.
You mean switch between batteries
manually? I want the alternator
to charge the engine
and house batteries
at the same time, but without the fear of the house battery draining the engine
I have a Victron isolator. I ran the engine with the alternator attached to the input of the isolator, and put 12V to the energise terminal, but it didn't energise the alternator (ie. no voltage output).
So I wired the alternator back to the engine battery, and now I only see battery voltage at the alternator output (12.6V). Before I tried the isolator I was getting 14V when I revved the engine.
So I wonder if I have damaged the alternator by wiring
it to the isolator... There was a delay between the engine starting (ie. alternator spinning) and me connecting the energise circuit. I didn't think this could damage the alternator, but perhaps I was wrong...
I'll take the alternator and the isolator to an electrician and spin it up on the bench to see what's going on.