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Old 06-10-2015, 12:48 PM   #15
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Yes the deep cycle not the starting battery. Jim
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Old 06-10-2015, 12:49 PM   #16
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Originally Posted by Gearheart View Post
Exactly. Now think about this. How long, even considering replacing the $61 battery every 3 years, (I get 5 years out of mine) before the expense starts to approach the cost of lithium batteries? Do lithium batteries last that long? Are they really worth it? As stated above, you must also totally re-configure your charging system. Add that cost in also.
BTW you do not want the marine starting MS battery. You want the marine deep cycle one.
Thank you Gearhart - my thoughts exactly. We sometimes forget we can OVER think "emergency readiness". Dead batteries - at a rally with no hookups. Unhitch, pull the dead cells, run to town, buy 2 deep cycle ones, plop them in, and smile. Duh.

Paula
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Old 06-10-2015, 01:12 PM   #17
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I went with Interstate Marine grade deep cycle AGM batteries in our new unit. They do not vent and water does not have to be added. A pair of Marine grad AGMs are more expensive than the normal wet cell batteries, but less than Lithium. The charger in your camper should also work fine with AGM batteries. Interstate claims three times the life over flooded batteries for their AGMs. I’ve had good luck with AGM in my motorcycle and truck.
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Old 06-10-2015, 01:25 PM   #18
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I went with Interstate Marine grade deep cycle AGM batteries in our new unit. They do not vent and water does not have to be added. A pair of Marine grad AGMs are more expensive than the normal wet cell batteries, but less than Lithium. The charger in your camper should also work fine with AGM batteries. Interstate claims three times the life over flooded batteries for their AGMs. Iíve had good luck with AGM in my motorcycle and truck.

Actually, the OEM Parallax converter with its constant voltage charging will ruin an AGM battery in short order. ALL lead based batteries, and especially AGM types require 3 stage charging at specific voltages determined by the battery manufacturer.

A steady 13.6 VDC from your P/lax WILL either under charge or overcharge any lead acid battery.


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Old 06-10-2015, 01:46 PM   #19
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Lew or others,
I understand from prior threads that there is at least one nearly exact replacement 3-stage converter to replace the Parallax single stage converter used in current 30Amp Airstreams. I have a 50amp unit - is there an available upgrade that a non-expert can install for 50amp configurations, or is it more complicated than that? Thanks in advance for any suggestions.
Best,
Joe
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Old 06-10-2015, 03:12 PM   #20
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My vintage trailer has little in the way of parasite drag so the folks with newer rigs might give better advice that me. Having said that, I am 5 years into an Optima AGM battery that is kept charged with an Intellipower converter. It has not to date shown any sign of weakness. I know it is charged every time I hook up because I operate the tongue jack on battery to be sure. The AGM batteries never require water and you don't have to worry about acid splashing out if you hit a bad patch of road. They are pretty rugged batteries and mine seem to charge fairly quickly, though I seldom run them completely down.
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Old 06-10-2015, 03:53 PM   #21
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Lew or others,
I understand from prior threads that there is at least one nearly exact replacement 3-stage converter to replace the Parallax single stage converter used in current 30Amp Airstreams. I have a 50amp unit - is there an available upgrade that a non-expert can install for 50amp configurations, or is it more complicated than that? Thanks in advance for any suggestions.
Best,
Joe

Progressive Dynamics 4655 replaces the 30 amp power center converters. For a deck mount used in the 50 amp units, use the PD 9260.

There is a nice thread somewhere detailing the DC fuse block conversion too.


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Old 06-10-2015, 04:15 PM   #22
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If you bought it from a dealer just a few weeks ago, I'd call them first. It must have come with some sort of warranty- 30 or 90 days even. The worst they can do is say no, and it only cost you a phone call.
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Old 06-10-2015, 07:46 PM   #23
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Can anyone tell me if the Costco 24DC pictured below is the same as the Interstate SRM-24.

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Old 06-10-2015, 08:43 PM   #24
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Originally Posted by Wayne&Sam View Post
If you bought it from a dealer just a few weeks ago, I'd call them first. It must have come with some sort of warranty- 30 or 90 days even. The worst they can do is say no, and it only cost you a phone call.
Good advice! My experience at dealership is to acknowledge it was sold as is and to ask 'if they can help you out' with a new battery.

The cost of a new battery is small price for customer retention. They likely have one in stock or could get you one at cost.

If a battery is the only thing on your service checklist you did well at the dealership!
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