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Re: [GMCnet] combiner question [message #167748] Fri, 27 April 2012 10:09 Go to previous message
Gary Casey is currently offline  Gary Casey   United States
Messages: 448
Registered: September 2009
Karma:
Senior Member
I suppose I'm being simplistic, and I know I'm being cheap, but I was also worried about having the alternator output and voltage sense taps being on opposite sides of a diode.  So I just threw away the diode and hard-wired the engine side together.  I use the standard interconnect contactor to join the engine and coach batteries together, switched from the dash.  I have a voltmeter that I can switch from the engine battery to the coach battery and I have a warning light to tell me the interconnect is on.  I just turn on the interconnect after starting to charge the coach.  Simple and foolproof - well, proof from all the fools except me.
Gary
 
Previously from Ken:
...
The point I'm trying to emphasize is that the existence of a good
alternator-to-chassis diode now has nothing to do with an hour from now --
it can fail even with the combiner in place, with no voltage applied, and
without any immediate indication until serious battery or other electrical
equipment damage has occurred.

Ken H.
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