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Date:         Sat, 14 Jun 2008 02:15:23 -0700
Reply-To:     M'obeechi <obeechi@RUNBOX.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         M'obeechi <obeechi@RUNBOX.COM>
Subject:      Re: Why AGM batts don't last as long as they should
Comments: To: taeke.t@GMAIL.COM
In-Reply-To:  <4852694e.4403be0a.563a.1663@mx.google.com>
Content-Type: text/plain; charset="iso-8859-15"

I asked someone who works on nothing but Alternators, if they could make me an external regulator for my alternator (in my case a subaru), and they're weren't even willing to consider it. So much, for changing to a regulator that will put out 14.2 volts...

From: Taeke <taeke.t@GMAIL.COM> To: vanagon@GERRY.VANAGON.COM Subject: Re: Why AGM batts don't last as long as they should

> There is a schematic for a temp controlled or adj. VR that works with a bosch alt. Floating around the internets. cost $6. > > -----Original Message----- > From: Philip Zimmerman <philzimm1@OBERON.ARK.COM> > Sent: Friday, June 13, 2008 12:15 AM > To: vanagon@GERRY.VANAGON.COM > Subject: Re: Why AGM batts don't last as long as they should > > Good to hear your report of this confirmation Stuart! > Anytime I hear of a Vanagon with a dead AGM or two, I'm curious to know > what is the charging voltage at the battery terminals? If anything less > than the "magic" number of 14.2 or so, an AGM is going to perform > poorly or less than optimal. > > I further concur with your suggestion for utilizing a Charger > specifically designed for AGM's on a routine basis. Any battery (let > alone an AGM) will perform better following a good full three-stage > charge from a 110VAC Charger. Gotta keep those electrons stirred-up.... > > Phil Z. > Campbell River, BC > ----------------------- > > > Date: Thu, 12 Jun 2008 11:37:31 -0700 > From: Stuart MacMillan <macgroup@COMCAST.NET> > > After talking to a few marine electrical experts, it seems the problem > with > AGM's in cars is the alternator voltage is too low. You need 14.2 > volts to > fully charge a discharged AGM, and most alternators put out about 13 to > 13.7 > volts, depending on load, which is fine for flooded standard and deep > cycle > batteries, but never fully charges an AGM. So, either find someone who > can > tweak the alternator output, or buy a charger specifically designed for > AGM > & Gel and use it at least once a week. >

----- End Original Message -----


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