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Date:         Sun, 29 Jul 2007 22:32:01 -0600
Reply-To:     Richard A Jones <jones@COLORADO.EDU>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Richard A Jones <jones@COLORADO.EDU>
Subject:      Re: Deep Cycle Batteries
In-Reply-To:  <20070730040859.F094A76A328@mx13.Colorado.EDU>
Content-Type: text/plain; charset=ISO-8859-1


>>  I charged the aux battery with
>> > no load on it (fridge and inverter are the only things wired to it) for
>> > about 45 minutes to get to 12.30 volts.
> 12.3V is not a charged battery in the first place. That is approaching
> 60% discharged, depending on your meter's accuracy.
>> > In an hour and a half of using the
>> > fridge it dropped from 12.3 to 10.62 volts, about the lower limit for any
>> > cooling.


Just a reminder to keep temperature in mind--as it affects battery
charge and voltage.   See, for example:
http://www.trojan-battery.com/Tech-Support/BatteryMaintenance/Charging.aspx
and note paragraph 6.  You can probabaly ignore temperature in
the summer, but certanly not in cool and cold weather.
Another site:
http://www.odysseybatteries.com/files/techbook.pdf


Richard
Bouler
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