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Old 11-25-2013, 02:04 PM   #1
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Need a straight answer

I have a 2014 FC 25 FB. My docs seem to indicate I have a 3 stage converter, but I have seen different opinions on the forums. Does anyone know the truth?
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Old 11-25-2013, 02:10 PM   #2
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interested...I have a recently aquired 2014 bunkhouse...have no idea what "stage" converter it is...if you dont mind my asking...what does "stage" mean exactly?

I have read over and over people want a "3 stage converter" as the single stage? is ?notorious? for over doing the batteries...

My operations manual said my converter is "excellent"
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Old 11-25-2013, 03:01 PM   #3
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Stages has to do with how many different steps of voltage the charging section has available to charge the battery. A 3 stage has bulk-absorption-float voltages all designed to properly charge the battery and keep it on a float voltage consistent with the manufacturer's battery specifications. The important point is consistent with the battery specs. An equalizing stage is also appropriate with flooded cells, but not AGM's. Plenty of threads about this on the forum.
I cannot help you with what is installed but you should be able to look at the converter label, go to the internet and find the converter specs. You could trust the docs provided but I have found them to be the wrong docs in a couple of instances.
Larry
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Old 11-25-2013, 03:38 PM   #4
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I had heard rumors that Airstream was finally going to "get religion" about 3-stage converter-chargers but this is the first I've heard of someone having one installed from the factory.
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Old 11-25-2013, 04:38 PM   #5
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My 2014 FC 20 did NOT have a 3 stage converter/charger. It had the standard Intellipower (spelling) 55 amp unit integrated with the 12 volt fuses and a 120 volt section for the 120 V Circuit breakers. This is all located in a single box, in my case under the refrigerator.

I replaced the converter/charger section of the original assembly with one from Progressive Dynamics, which is a true three stage unit. I think it is a PD 46xx (xx indicates the amp capacity). Cost was about $200 as I recall, and included an entire new fuse block with little red LED lights that indicate if a fuse has blown. It is a worthwhile upgrade.
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Old 11-25-2013, 04:46 PM   #6
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Quote:
Originally Posted by Will_Brule View Post
I have a 2014 FC 25 FB. My docs seem to indicate I have a 3 stage converter, but I have seen different opinions on the forums. Does anyone know the truth?
Post the make and model of your converter. We can figure it out from there.
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Old 12-01-2013, 04:36 PM   #7
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Parallax Converter Charger

Quote:
Originally Posted by Aage View Post
Post the make and model of your converter. We can figure it out from there.
My converter/charger is a Parallax Series 7300, model 7355. It appears they make several sub-models of the 7355, but mine is just marked 7355. Our AS is stored for several weeks at a time and I'm concerned about over-charging the batteries if I just leave the battery switch set to "use".
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Old 12-01-2013, 05:34 PM   #8
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Found the sales slick online that mentions an option T that has two stage charging.

So, I guess it is possible that you have that option.

http://www.parallaxpower.com/7300/7300pwrcntr.pdf


Regards,

JD
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