Gould,

Very interesting information. I wish I knew where to find out more about the
theory and practice of these things.

I have read conflicting things about the safety of AC chargers and
alternator chargers running simultaneously, but as someone who has blown an
alternator and a voltage regulator over the past two seasons, I say why risk
it.

Now - how to remember always to turn off the AC charger before starting the
engine...

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Charles T. Low
- remove "UN"
www.boatdocking.com/BDPhoto.html - Photo Contest
www.boatdocking.com
www.ctlow.ca/Trojan26 - my boat

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"Gould 0738" wrote in message
...
...
There is an upper voltage limit on some of the regulators and controllers
used
to regulate charging from alternators, AC converters, or any other sources
like
wind or solar. In some 12-volt system cases, this is 26-28 volts. An
alternator
pumping out 14-15 volts and an AC converter doing the same could blow out
some
of these components. I have direct knowledge of
an alternator that required a rebuild...