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Old 02-10-2014, 09:00 AM   #29
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I don't know for sure if the engine start battery is a Group 49 (I think it is) but Interstate makes an MT5-49 / H8 AGM. My cost locally is about $222. Specs: 95 amps 900 CCA Cap 85 weighs 59#. Last time I checked Lifeline DOES NOT make a group 49 battery.
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Old 02-10-2014, 09:02 AM   #30
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Sounds like you have a 115 volt circuit breaker(s) off. If you are on shore power/generator the TVs should work. You've got a 30 amp breaker for the main and then there is a 20 amp breaker for the Inverter system.
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Old 03-17-2014, 12:29 PM   #31
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I was specifically told by the factory not to continually use shore power on my 2014 AI Ext as it would ruin the holding capacity of the house batteries. Was that old information. My unit has the Magnum Inverter.
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Old 03-17-2014, 12:36 PM   #32
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Magnum inverter/chargers are a far cry from the POS single voltage converters that are used in their trailers.

Magnums WILL properly charge your house batteries if correctly programmed You will need the optional ( with Airstream only) battery temp sensor for accurate to compensated charging.

These are regularly included with a new Magnum, and I have no idea why Airstream chooses to delete them.

PM me if you have more questions.
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Old 03-17-2014, 01:49 PM   #33
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What about the older ones w/ the Tripp-Lite inverter? Is it detrimental to the house batteries to leave the RV plugged in to shore power constantly?
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Old 03-17-2014, 07:57 PM   #34
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Originally Posted by 73shark View Post
What about the older ones w/ the Tripp-Lite inverter? Is it detrimental to the house batteries to leave the RV plugged in to shore power constantly?
I'm not real familiar with the Tripp-Lite units. Protagonist, IIRC, has one so hopefully he will chime in. I don't believe that they have full temperature compensation, which is extremely important for proper and complete battery charging.

Also, a very worthwhile upgrade if you have a Magnum, is to replace the mini remote with the full-function Magnum ME-RC remote. You can add Magnum's battery monitor kit….ME-BMK that reads thru the Magnum remote rather than adding a Tri-Metric with yet another remote panel to deal with.
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Old 03-17-2014, 08:06 PM   #35
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Thanks for the info. I was told that the only reason that AS changed to the Magnum was a change in the generator that the Tripp-Lite wasn't compatible with.
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Old 03-17-2014, 08:48 PM   #36
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I'm not real familiar with the Tripp-Lite units. Protagonist, IIRC, has one so hopefully he will chime in. I don't believe that they have full temperature compensation, which is extremely important for proper and complete battery charging.
I don't believe the TrippLite has any temperature compensation at all. Near as I can tell, the only advantage of the TrippLite is that there is a three-position switch easily accessible right on the front of the unit, with the middle position being "Off." So when you've got your Interstate in storage and NOT plugged in, you can be absolutely sure you've eliminated that source of parasitic drain.

On the whole, I'd rather have the Magnum. But not to the point that I'll rip out a serviceable TrippLite to install one. But if the TrippLite starts giving me problems, it's so gone…
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