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Parrothead Mike

SW Michigan

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Posted: 08/03/19 12:38pm Link  |  Quote  |  Print  |  Notify Moderator

Today, August 3, Sam's club has a sale on Marine/RV batteries. Since my current Interstate is getting to be 3+ years old I'm considering purchasing one of the Duracell Marine/RV batteries at Sam's & keeping the Interstate currently in the camper as backup.

My Interstate hasn't been holding up well when dry camping at music festivals we attend. I do use my Honda 2000i as a backup charger, but would like a longer lasting battery plus one festival doesn't allow generators. Any background or experience with Duracell Marine/RV batteries would be much appreciated.

Two batteries under consideration:

Duracell 27MAGM Platinum w/ CCA-580 & MCA-900 price: about $160

Duracell SL34MAGM w/ CCA750 & MCA 850 price: about $120

This is for my 2015 Cedar Creek Silverback 29RE

Current Interestate - CCA-550 & MCA-690


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MEXICOWANDERER

las peñas, michoacan, mexico

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Posted: 08/03/19 01:18pm Link  |  Quote  |  Print  |  Notify Moderator

Chances are it's the charging and not the battery. Percentage like 90%.

100% guesswork until you obtain an accurate hydrometer and observe reality vs guesswork.

Some folks go through batteries like a 10-year-old goes through M&M's. They refuse to make an effort to diagnose an obvious argument between reality and what they think [emoticon]

BFL13

Victoria, BC

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Posted: 08/03/19 01:26pm Link  |  Quote  |  Print  |  Notify Moderator

In the OP aren't they all "starting" batteries? You want a "deep cycle" battery. At least get one with "DC" in its name even if it is a hybrid starting/deep cycle type. Look for AH rating at the 20 hr rate. Should be 90 or so. More is better.


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Parrothead Mike

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Posted: 08/03/19 01:35pm Link  |  Quote  |  Print  |  Notify Moderator

BFL13 wrote:

In the OP aren't they all "starting" batteries? You want a "deep cycle" battery. At least get one with "DC" in its name even if it is a hybrid starting/deep cycle type. Look for AH rating at the 20 hr rate. Should be 90 or so. More is better.


Yeah, the 20 amp hour rate: 92 according to the website description. I agree, I don't need cold cranking, but deep cycle.

pianotuna

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Posted: 08/03/19 02:11pm Link  |  Quote  |  Print  |  Notify Moderator

Hate to say it but look at golf cart jars. They are true deep cycle batteries.


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My ride is a 28 foot Class C, 256 watts solar, 556 amp hours of AGM in two battery banks 12 volt batteries, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

Ron3rd

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Posted: 08/03/19 03:21pm Link  |  Quote  |  Print  |  Notify Moderator

I would consider those batteries about the same as Interstate, no better or worse


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Lwiddis

Veterans’ Park, Monterey, California

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Posted: 08/03/19 04:21pm Link  |  Quote  |  Print  |  Notify Moderator

Except for running AC and microwave why aren’t you recharging with solar? That one “generator free” festival must be pleasant.


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theoldwizard1

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Posted: 08/03/19 04:44pm Link  |  Quote  |  Print  |  Notify Moderator

CCA and MCA are not very important for a "house" battery. Reserve capacity (RC) and 20 amp hour rating are a more important numbers.

pianotuna wrote:

Hate to say it but look at golf cart jars. They are true deep cycle batteries.

Yep ! In the long run, you will be happier with a pair of 6V GC-2 golf cart batteries. If AGM is a "MUST HAVE", AGM golf cart batteries do exist, but are difficult to acquire and are much more expense than "flooded" golf cart batteries.

MDKMDK

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Posted: 08/03/19 04:48pm Link  |  Quote  |  Print  |  Notify Moderator

I've had two of the Duracell SL34MAGM and used them as starting batteries in a Cavalier and an F150. Both perform well as starters. The 20 Ah rate for them is 55. Not much if you're off gridding a lot.


Mike.
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Parrothead Mike

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Posted: 08/03/19 05:09pm Link  |  Quote  |  Print  |  Notify Moderator

Original poster here.

Bought the Duracell 27MAGM Platinum w/ CCA-580 & MCA-900. Was on sale for $138 + tax. Had to get it at Sam's today due to the one day sale. Thanks to everyone for your input.

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