Date:         Sun, 16 Oct 2005 23:32:43 -0600
Reply-To:     camper@TACTICAL-BUS.INFO
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Jimt Thomson <camper@TACTICAL-BUS.INFO>
Subject:      Re: Optima Batteries - Red Yellow or Blue?
Content-Type: text/plain;charset=iso-8859-1

 the trojan 27tmh --- 25*200/60=83AH.

the optima deep is a size 31 (larger)--- 25*155/60=64AH

the typical 41 batt in the vanagon ---25*105/60=44AH

the above is one of the reasons i use optima starting batteries in some
cases but not the deep cycle.

it is in the middle of a standard vw starting battery and a regular deep
cycle.
but as i stated before, most lead acid deep cycle are basically the same
as to storage capacity but vary widely in the endurance over years of use
and cyclic rate of discharge.

From looking at other AGM specs i find that most of them were basically
the same as well.  great starting batteries but not so good as deep cycle.
jimt

> The Trojan 29 TMH has a 20 hr rate of 115 amp hours. 2 Optimas will not
> match it. A pair of 6 volt T-105's will give 225 amps hours over 20
> hours. They can usually be obtained for ~$80-$90 each.
>
> Dennis
>
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
> Of jimt
> Sent: Sunday, October 16, 2005 2:07 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: Optima Batteries - Red Yellow or Blue?
>
> Most deep cycle batteries actually have very similar AH ratings.  The
> major
> difference is the construction of the batteries.  Trojan has one of the
> highest longevity and cycling rates in the industry. Crown and Concorde
> and
> Surrette (Rolls) batteries are in the same class.  Prices for all 4 in a
> group 27 deep cycle run from 140 to 180US depending on source.
> Their warranty usually runs 5 to 7yr.
>
> Well beyond the usual 1 year of the cheapest and the 2 year on the
> "better"
> deep cycle batteries.
>
> Sources in the US are usually golf cart specialists for the little ones,
> RV
> dealerships for the bigger ones, and commercial equipment distributors
> for
> the real big ones.
>
> My budget says I settle for "better" grade.  Cant afford a "best".
>
> jimt
>
> On 10/15/05 5:42 PM, "Dennis Haynes" <dhaynes@OPTONLINE.NET> wrote:
>
>> Since you are moving the batteries to under the rear seat, forget the
>> Optimas and get some real batteries. The blue top is a compromise
>> battery sort of like all season tires. Trojan is the best, reasonable
>> battery line and they have a lot of choices in both conventional and
>> sealed batteries. They have some starting batteries with capacities
> that
>> can really surprise you. Here is the deep cycle page.
>> http://www.trojanbattery.com/Products/RecreationalVehicle.aspx
>>
>> And here is the engine starting or commercial page.
>> http://www.trojanbattery.com/Products/commercial.aspx
>>
>> Dennis
>>
>