tomlang
Los Angeles area
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Joined: 06/11/2007
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If you have room for three batteries, why not install three in parallel? I'd go with AGM deep cycle or marine batteries.
Tom and Lynne
Tom is an Electronics Engineer, Lynne a retired teacher.
old rig is a 1988 Winnebago Superchief, just back from being on tour with the Blue Turtle Seduction (band)
new (our dream rig) is a 2003 Foretravel 38' U295
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Westronics
Redmond, WA
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Joined: 08/07/2002
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mfa wrote:...IMO, for your purposes, if you don't get true deep cycle batteries then you are wasting your money. 6V golf cart batteries are made for deep cycling purposes...
Correct. But note that there are indeed true deep cycle 12V batteries, too. The trojan J150 is one such battery.
However, since you have the room, two (or even four) 6-volt golf cart batteries would do you nicely.
2002 Jayco Greyhawk 24SS, Cameras (RVCams), ScanGauge II/Blendmount, 300W Inverter, Airtabs,12' Portabote w/sail, Be kind to septic systems.
Ford motorhome customer service: 1-800-444-3311.
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Westronics
Redmond, WA
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Joined: 08/07/2002
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tomlang wrote:If you have room for three batteries, why not install three in parallel? I'd go with AGM deep cycle or marine batteries.
Marine batteries are dual-purpose batteries and are rated at fewer amp-hours that a true deep-cycle battery.
AGM deep cycle are pretty good and have their advantages, but also have fewer amp-hours available than a flooded-cell deep-cycle battery.
Trojan batteries pretty much set the standard, though they are not the cheapest.
As a FYI, here's a few statistics on battery life from some choice (an amp-hour (aH) is a measure of how long the battery will last - roughly how many hours it will last drawing that many amps.
Trojan T-105 Plus 6-volt is a very common choice and two of them will give 12 volts with 225 aH @ 20 hour rate. The dimensions for each are 10-3/8" L x 7-1/8" W x 10-11/16" tall. You can get higher rated 6-volt batteries (bigger and more expensive) up to 260 aH pretty readily.
Two Trojan J150 plus (or T1275 plus) will give 12-volts with 300 aH of power. The dimensions for each are 13-13/16" L x 7-1/8" W x 11-1/8" H (or, for the T-1275, 12-7/8" L x 7-1/8" W x 10-11/16" H.
A pair of Trojan 27-AGM will give only 200 aH of power. The dimensions for each are 12-7/8" L x 7-1/8" W x 10-11/16" tall.
A pair of Trojan SCS 225 batteries (marine batteries) will give 260 aH of power. The dimensions for each are 13-15/16" L x 6-3/4" W x 9-7/8" tall.
The battery you have now is likley rated lower 100 aH.
My best advice would be to get the most capable batteries that will fit - that you can afford.
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