I'd expect after a long drive that the battery would be hotter than when I
started. I don't know much about the National Luna unit. Does it switch in
the batteries with a relay or does it use rectifiers? If it uses rectifiers
to steer charging current then 12.7V is probably OK. Semiconductors never
turn all the way on and you could easily be dropping a volt across the
system.

Thanks, Tom Hargrave
www.stir-plate.com
www.towercooler.com
www.kegkits.com

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM] On Behalf Of
Peter Kote
Sent: Thursday, January 19, 2012 11:36 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Battery

I am on a roadtrip�to Belize and have a National Luna unit.� I have two
brand new batteries (41) and�have the unit plugged in all day to the 12 volt
system.� While driving i seem to loose some juice.� This morning the battery
read 13.2 and at the end of the day it read 12.7.� Does this mean my
alternator maybe not be working efficiently? it is the original altenator on
a Westy 90 with 110,000 miles.
�
any feedback would be appreciated - thanks.
pete
�
�
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