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Old 06-24-2013, 09:37 PM   #1
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AGM Batteries/Maintenance Free Batteries

If I keep my (2) 12 volt maintenance free chassis batteries and get (4) 6 volt AGM batteries for the house, will my inverter be able to charge both types of batteries safely? I have a Heart Freedom 458 Inverter on a 2002 Alpine Coach.
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Old 06-24-2013, 10:57 PM   #2
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I don't believe there will be an issue having flooded-cells for the chassis batteries and AGM for the house batteries.

However, are you certain your chassis batteries are being charged by the inverter? Do you have a B.I.R.D., or Trik-L-Start, or an Echo Charge? If not, your chassis batteries many not be receiving any charge when your house are being charged by the inverter.

-harry
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Old 06-24-2013, 11:06 PM   #3
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We have the same inverter, but have 2 maintenance free 12 v chassis batteries (1,000 CCA each) and four deep cycle 6v GC-2 batteries. No problem with that combination and we do have a BIRD system.
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Old 06-24-2013, 11:13 PM   #4
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I have an Echo Charge.
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Old 06-24-2013, 11:19 PM   #5
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Dean - From what I have been lead to believe you have to adjust the charger for AGM as opposed to wet cells. I have all AGM and was told by my service guys that I cannot mix them. So be careful. AGMs are expensive if you blow them.
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Old 06-24-2013, 11:57 PM   #6
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I believe if you check the book on your Freedom 458 you'll find that you can set it up for an AGM charge profile. Set it up that way and you should not have any issues. My former rig had 6 AGM's and 4 flooded batteries charging off my Freedom 458. We ran it that way for 4+ years and never had a problem.
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Old 06-25-2013, 12:50 AM   #7
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Dean isn't mixing the batteries on the same bank so I'm sure what he is doing is acceptable.

Here is the link to the Owner's Manual:

Freedom 458 Owner's Manual

It will touch upon the wiring in series of the golf cart 6v

On page 20, it will give you the voltage settings for all types including AGM

Page 20 attached below.

-harry
Attached Files
File Type: pdf Freedom458OwnerManual p. 20.pdf (31.6 KB, 13 views)
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Old 06-25-2013, 11:31 PM   #8
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After using flooded mode on my AGM batteries I figured I compromised the batteries but after calling Lifeline they assure d me they can be charged in that mode without damage. The voltage is lower from the charger in AGM mode and they seem to discharge faster so I put it back to flooded about a year ago and still working great. I have a Magnum charger/inverter.
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