Voltage regulators can change slightly due to temperature. As it gets colder
voltage tends to go up. Orin reality voltage goes down as temperature
increases. If using the van for long trips it would be better for the
batteries to set voltage between 13.8 to14.2. 14.5 is an upper limit for
most flooded batteries. At 14.5 volts you are above the gassing stage and
promoting corrosion of the positive plates.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Alistair Bell
Sent: Sunday, January 6, 2013 1:14 PM
To: vanagon@GERRY.VANAGON.COM
Subject: aux. battery wiring and ACR issues

I have been experiencing some undercharging of my aux battery recently and I
think I figured it out. I've posted my findings and sketched up my aux.
battery wiring in this post on my blog:

http://shufti.wordpress.com/2013/01/06/vanagon-my-auxiliary-battery-wiring/

alistair