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Old 11-05-2008, 04:04 AM   #1
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I've been having some charging issues with my house batteries over the last few months. I am thinking about going to sealed batteries in stead of the open cells. I don't know what issues to expect from the closed or evenif they are better or worst for the coach bats.

Any suggestions will help.
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Old 11-05-2008, 04:04 AM   #2
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I've been having some charging issues with my house batteries over the last few months. I am thinking about going to sealed batteries in stead of the open cells. I don't know what issues to expect from the closed or evenif they are better or worst for the coach bats.

Any suggestions will help.
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Old 11-05-2008, 04:29 AM   #3
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We used the small sealed batteries in the mobility scooters my wife needs to get around. If the full size batteries for a MH cost proportionally, expect to pay a mint!
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Old 11-05-2008, 07:18 AM   #4
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If you are talking about AGM batteries vs Lead Acid batteries, AGM batteries are heads and heals better and longer lasting than the Lead Acid type....you also get what you pay for.
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Old 11-05-2008, 08:05 AM   #5
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If you mean you want truly 'maintenance free' batteries, agree that AGM is the way to go. Expensive, for sure, but never have to worry about electrolyte level.

Your other option would be something like the Delco Voyager batteries...lead acid but advertised as 'maintenance free.' I used them in my boats for years and they were less trouble than conventional batteries, but cost more and lasted no longer.

I struggled with this issue when I needed to replace my three deep cycle house batteries 2 yrs. ago. I ended up with 3 29M Interstates and added the Qwik Fill system. That makes it very easy to maintain electrolyte levels.
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Old 11-05-2008, 09:08 AM   #6
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">having some charging issues with my house batteries </div></BLOCKQUOTE>
fix this first. Any battery will not provide optimum service unless you have proper charging and maintenance for it.
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Old 11-05-2008, 01:55 PM   #7
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I disagree that AGM is the way to go. Easier, sure. But more sensitive to charging than wet cell batteries. I will be changing soon, most likely to 6 volt golf cart batteries. These batteries are much tougher than most any 12 Volts that are out there. The 6 volts are designed to take a deep discharge and come back strong time after time. That is where your reliability comes from.

Anything sealed will always be a guess as to it's heath.

Just my .02

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Old 11-05-2008, 03:51 PM   #8
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I agree Sarge we went through 2 sets of 3 12v in 3 years before switching to 4 6v deep cycle. They are now 5 years old and still test fine. They also only need cleaning twice year and watered every 3-4 mo. hope to get another 2-3 years out of then time will tell anyway will surly use 6v deep cycle again.
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Old 11-06-2008, 03:56 AM   #9
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We had gel batteries on our sailboat and they tolerated lots of charge abuse and discharge abuse. Three stage charging was accomplished by me manually adjusting the alternator field current (via a rheostat) to pump as much current as possible into the batteries (an 8D and two 4Ds) in as short a period of time as possible. We would be sometimes running on the diesel for 24 hours at a time, or at anchor for two weeks at a time - so charge-discharge cycles were all over the map.

Our AGMs (three for the house bank on the coach) are going strong after three full years of hard use. Maintenance consists of me blowing the dirt/dust off once in a while. AGMs have a lower internal resistance which means they self-discharge slower, and charge faster than non-AGM.

Nothing wrong with quality (Rolls, Surrette) flooded cell batteries for deep-cycle use - I just don't want the hassle of checking the water.
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Old 11-06-2008, 06:13 AM   #10
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Understandable. However, I constantly "tinker" with everything, so to me it's not a hassle. I usually will find little things that need attention by regular poking and prodding. And as a full timer it keeps me on top of maintenance.
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Old 11-06-2008, 08:01 AM   #11
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I may be wrong but did I read that gel or agm wont work with our converters?
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Old 11-06-2008, 10:06 AM   #12
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">6 volt golf cart batteries. These batteries are much tougher than most any 12 Volts that are out there. </div></BLOCKQUOTE>
despite the testimonial, neither the available data nor the spec sheets I have been able to find support this idea. It is a common and dearly held viewpoint, though.

Do note such things as that there is no solid rational definition for "deep cycle" quality that you can find reflected in a spec sheet and that your RV is not a golf cart.

Also, no RV suitable lead acid battery should be 'deep discharged' (i.e. &lt; 50% SoC) if long life is desired. What kills batteries is misuse and improper storage maintenance.

Gel batteries are rather sensitive, especially to higher currents. AGM batteries are good when you need to handle large currents. These are not usually cost effective from a purely rational perspective.
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Old 11-06-2008, 12:48 PM   #13
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by jdsr:
I may be wrong but did I read that gel or agm wont work with our converters? </div></BLOCKQUOTE>Depends on your charger - what does your manual say?
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Old 11-07-2008, 03:30 AM   #14
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What would be the best (cheapest) source for AGM batteries?
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