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Old 10-03-2008, 09:35 PM   #15
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Amperage (amps) is a measure of instantaneous current, i.e. the current that is flowing at a particular time. Amp-hours is a measure of current over time. A current of 6.7 amps x 5 hours per day = 33 amp-HOURS per day.

Batteries may be rated in both amps (at different temperatures for cranking purposes) and amp-hours (for deep-cycle purposes).

It is also incorrect to make the blanket statement that AGM batteries do not need to be in vented enclosures. In an overcharge situation such as a shorted cell they most certainly do pop their overpressure vents and vent hydrogen. Although many do not use a vented battery box and get away with it, a few don't. I don't think any of the electrical equipment in an Airstream is certified for use in explosive environments. In particular, this includes the converters often colocated with the batteries.
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Old 10-06-2008, 05:40 PM   #16
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Hi Maurice,

You got it, for on the amperage and the ratings for batteries. That is the great thing about AGM’s you don’t need them to be in a vented battery box because they are a ‘sealed’ battery. As far as venting goes, something else in the system would pop if it was designed properly before the AGM does. There should be a fuse that would pop before it gets to the battery. Also the gases are in a gel form so if an AGM broke it would spill gel not gases to my knowledge. If you have any other questions please let me know.

Mark
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Old 10-06-2008, 06:03 PM   #17
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That's okay, I think I've heard all I needed to hear.
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