an invalid topic 2 AGM batteries and converter

Hi,

AGM do recharge more quickly due to lower internal resistance. Flooded at 85% state of charge only accept a 12.5 amps charging rate (per 100 amp-hours of capacity) and that gets lower as 100% is approached. This tapering of charge rates seems to happen at about 95% state of charge for AGM.

Self discharge is much lower in an AGM.

My personal opinion is that the very nature of the design makes them some what more vibration tolerant.

AGM are going to be more expensive per amp-hour than flooded golf cart batteries.

AGM may exhibit less voltage drop than golf cart.

With any battery cell count matters. More cells increases the risk of failure.

My ideal bank would be 1000 amp-hours of six 2 volt AGM. Seeing as I have a beer budget, I'm using 556 amp-hours consisting of for 12 volt telecom jars.

Telecom agm is a special subset and appear to act as if they were flooded to some extent. But it is the less desirable characteristics that are mimicked such as lower current (amperage) recharging rates. For example, the suggested maximum recharging rate for mine is limited to 27 amps each.

kerrlakeRoo wrote:
OK, not a total battery geek,,,,, yet, but have watched and listened enough to get that a multi use battery ie; deep cycle/starting marine battery is not going to do as well as a Golf Cart battery, have seen very little for some reason about 12 volt deep cycle batteries such as sweeper batteries which can be 12 volt 200+ amphr, in a single unit for under $250, vs the GC-2's
Do they both poorly handle 50% + discharge rates?
Is one any better than the other?
Do the GC batteries better handle bouncing around?
Can AGM's better handle a 75% discharge?
And how long to recharge both types?
Those of you deeply invested in the differing types seem to get so deep into the littlest differences, that stating the basics in these threads gets by-passed.
Would love to see a site or thread explain the advantages of each.

Whenever I do a workup and the

Invalid Entry

Pops up

I repost in a new thread.

Like carrying a toolkit, bubble gum and baling wire to keep a Yugo limping along...

Trying to compare different batteries is like comparing different women. Each has different attributes which have different weight to different people. For instance, lithium batteries are extremely expensive and have quirks that some folks simply will not put up with. Others pshaw the cost and work around the weak points, reveling in the battery strong points.

A big negative of flooded batteries is the flood. They age get antimony poisoning and get gas like the cowboy campfire scene in Blazing Saddles. Nobody likes the damage the acid causes.

Strong and weak points. Lied about, over and under-emphasized by battery marketers as determined by their aggressive advertising. Put your trust in putting forth single questions on this forum -- an exaggeration gets called-on fast.

OK I'm part way there, space limits my plans to 240 amp hrs, Since it isnt a frequently recurring cost, I dont mind the extra for AGM, but with GC batteries, at 50% discharge they start to be degraded, so only 120 amphrs is actually usable. Is that the same with an AGM? Or can they better handle deeper discharge than GC? With both of us using Cpap and or Bipap I know we will be knocking down our available amps by 40 to 60 nightly with no other draws. Lights and other uses pulling it down even more so I am trying to figure the easiest way to recoup that using about 300 watts solar and genny time for the remainder without greatly shortening the life of the battery.

Rail Dawg wrote:
I’m new here but what happened to this thread and all the other very useful information that had been posted?

Rail Dawg - these are the bunch that actually lives in the trailer world 24/7 running off their batteries all the time...

They have lots of battery charging experiences...

Especially MEX and DON... Mex lives down south of us and holds out as long as he can and usually a Hurricane will run him off. Then he shows up in San Diego buying up all the parts to keep him for another year or so haha Don lives in the North cold areas in his big trailer going all over tuning up piano's... I wish I had his Trojan 12V T1275's

The rest of us kinda blend in with our Battery stories when they let us haha... They all good people...

Roy Ken

Rail Dawg wrote:
I’m new here but what happened to this thread and all the other very useful information that had been posted?

As you know it is not gone, this is a different thread than the one you started!

your's is still here
https://www.rv.net/forum/index.cfm/fuseaction/thread/tid/29623011.cfm

AN INVALID POST OR ID WAS PASSED IN is not fixable. Have no idea how to fix the problem on the RV server. Rather than lose a half hour's worth of work, I reposted it in a NEW thread with the INVALID POST caveat in the title.

Separate post below to answer your battery question...

MEXICOWANDERER wrote:
AN INVALID POST OR ID WAS PASSED IN is not fixable. Have no idea how to fix the problem on the RV server. Rather than lose a half hour's worth of work, I reposted it in a NEW thread with the INVALID POST caveat in the title.

Separate post below to answer your battery question...

When I get that after failing a robot test, I hit the back button and get my post showing again, and then hit post message and it either goes or back to the robot quiz.

Google LIFELINE TECHNICAL MANUAL

technical manual - Lifeline Batteries
lifelinebatteries.com/wp-content/uploads/.../6-0101-Rev-E-Lifeline-Technical-Manual.p...
TECHNICAL MANUAL. For. Lifeline® Batteries. Manufactured by: Concorde Battery Corporation. 2009 San Bernardino Road. West Covina, CA 91790. Phone 626-813-1234. Fax 626-813-1235 www.lifelinebatteries.com. Document No. 6-0101. Revision E. February 2, 2017. NOTICE: The technical data contained herein has ...

It is in PDF format and just about the best source of general information about AGM batteries as is available. Lifeline batteries a product of Concorde battery have double the thickness positive plate and in the case of GC220 series pairs, offers a much higher performance level for large loads like inverters and coffeemakers and microwaves, and they also recharge faster -- safely allow more charging current to be applied to them.

Treat a Lifeline right and it'll give twice the service life as a regular AGM battery. Do the math against the higher purchase price. But if the battery is mistreated it would be a foolish waste of money.

Lifeline is hyper-picky about the way they want their product treated. But I have an eight-year old product sitting beside me that was rather sloppily maintained and a Lifeline authorized capacity test last August had it displaying one more amp hour than it's rated for. This particular battery is on emergency lighting and Bi-PAP standby duty and I'd not be a but surprised if it lasts 15-years.

Trojan battery treats the specification for the thickness of their positive plates like it was the family jewels.

Lifeline brags their positive plate is .105". This is like the difference between a Hyundai and a Lexus. No competing AGM can even begin to touch the exceptional points of a Lifeline.

I'm also picky about my flooded batteries and choose Rolls & Surrette.

I despise battery problems. I have better things to do than monkey around with a battery issue all day.