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Old 04-01-2014, 01:19 PM   #1
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Not all AGM are good ones

While looking for something else we discovered some photos from one of a few sites that had battery issues and decided they would be of some interest here.

These are Telco grade VRLA/AGM batteries that are connected to high dollar power plants set specifically for that model of battery in an air conditioned shelter...in short, perfect happy conditions for the batteries.

The batteries in the photos swelled up and a few of them broke open.

This was not unique to one site but observed in a few, but the battery and condition was the same.

All of these were later taken out of service and replaced, but the point here is one needs to do their homework first to determine what battery to use, then they need to look at the battery selected to insure it has a long standing of installation history and overall quality.

The ones in the photos were "new" production and the price was right, but the end was a very bad deal.

These were not USA made, another batch from another company were USA made but had a different systemic failure.

The point of this post is to only advise that folks need to due a fair amount of homework if they are going to make changes from one battery type to another, changing type requires some engineering to insure charge rate and a few other details are proper.

We have seen many threads where folks do not take the time to address everything then they are upset that the end result did not meet their needs and then try to troubleshoot a design problem...system is working exactly as it should but does not do what the user wanted it to do.


Once the engineering is done for the final type of plant then the homework required to select all of the parts that will be used begins, and the suitability of the products for the use and the quality of the products need proper consideration to avoid issues as shown in the photos.

This may get interesting...
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Old 04-01-2014, 02:47 PM   #2
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Thanks for the posting Tony. That is good info and something I never would have thought of.
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Old 04-01-2014, 05:23 PM   #3
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Quote:
Originally Posted by TQ60 View Post
...The point of this post is to only advise that folks need to due a fair amount of homework if they are going to make changes from one battery type to another, changing type requires some engineering to insure charge rate and a few other details are proper.

We have seen many threads where folks do not take the time to address everything then they are upset that the end result did not meet their needs and then try to troubleshoot a design problem...system is working exactly as it should but does not do what the user wanted it to do...
Agree, if you switch from any other type battery to AGMs, you must be sure your charger is set for the AGMs. I'm not sure why this post is entitled, "Not All AGMs Are Good Ones." If the charger is not set up for AGMs, it's not the battery's fault they did not work as advertised. Since the batteries were set up "for that model of battery in an air conditioned shelter...in short, perfect happy conditions for the batteries"...maybe there were some other problems that were not noted.
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Old 04-01-2014, 06:49 PM   #4
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It was titled as such due to the discovery of the bad batteries.

Could not find the photos of the ones that had the tops blown off but that is another story...

Got long winded in the setup and decided to add more points to consider as the conversation about battery types seems to repeat often and VRLA usually presented as greatest things when they are just another battery that may or may not be suitable for the specific task.


So having some photos and comments together may help some of those who are thinking about changing.
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Old 04-01-2014, 06:56 PM   #5
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The batteries were garbage and failed due to that fact only.

I added the description of how they were installed to reduce comments suggesting something other than the battery was at fault.

Reason for post is to be sure you consider everything including the quality and proven reliability of the batteries.
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Old 04-01-2014, 08:24 PM   #6
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You are correct, all AGM's are not good ones.

And your point on charge rates is true. Even Magnum Energy has different charge rates for thier systems in regards to battery manafactuers of AGM's.

The Lifeline setting will chared at a higher rate then the other agm setting.
AGN setting 1 if for Lifeline and 2 is for all others on my system.
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