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Date:         Tue, 20 Jun 2006 16:58:28 +0000
Reply-To:     Dave Vickery <davevickery@HOTMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Dave Vickery <davevickery@HOTMAIL.COM>
Subject:      Re: Understanding Amp Hours
In-Reply-To:  <86476e250606200843x4758330dt3bdc1f8c5b66f6e3@mail.gmail.com>
Content-Type: text/plain; format=flowed

A real world example. A new Sears diehard 650 CCA aux battery will last 4 hours until completely dead running the 8 AMP fridge. On 12 V the fridge runs continously pulling 8 amps. So assume 50% depletion in 2 hours = 16 Amps available.

>From: Loren Busch <starwagen@GMAIL.COM> >Reply-To: Loren Busch <starwagen@GMAIL.COM> >To: vanagon@GERRY.VANAGON.COM >Subject: Understanding Amp Hours >Date: Tue, 20 Jun 2006 08:43:35 -0700 > >The answer to another question here on the list raised this question. >Given >that we have the amp hour rating for a battery and also given that we don't >want to draw it down below about 10.5 volts, about 80%. Does that amp hour >rating assume draw down to the 80% level, or draw down to 'dead', zero? >I've always assumed that if I have a 50 amp hour battery that I can draw 1 >amp for 50 hours before reaching the point that will require charging, or >will I only get 20% of that, 1 amp for 10 hours, before reaching the point >where I need to recharge?


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