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
>