Eastar LIFEPO Battery

[rfg9585]

I seem to have found a pretty good deal on a lifepo battery on alibaba, made by Eastar. I am not at all battery knowledgable so could anyone tell me if this would be a good replacement for my 4 Interstates(225ah) 2s2p setup? At a glance I am wondering if the charge\discharge rates are an issue.

Currently my electrical setup is magnum me-2012 inverter\charger and standard remote monitor with ags.

Any thoughts appreciated before I pull the trigger?

[gatorcq]

Here is where and who I purchased my Batteries. Came to my door 10 days later.
I used alibaba Trade assurance (create a account).
Leon is my contact:
leon@elitenewenergy.com


Drop in place for charging.
Reference - https://www.powerstream.com/LLLF.htm

Another Approach and Information
Charge Voltage Needed

So what Voltage is enough to get those ions moving? A little experimenting shows that 13.6 Volt (3.4V per cell) is the cut-off point; below that very little happens, while above that the battery will get at least 95% full given enough time. At 14.0 Volt (3.5V per cell) the battery easily charges up to 95+ percent with a few hours absorb time and for all intents and purposes there is little difference in charging between 14.0 or higher Voltages, things just happen a little faster at 14.2 Volt and above.

[tmandoug1]

Does100ah on that battery equal the 225ah of the interstates? What was the cost of each battery?

[twinboat]

100 AH is 100 AH in any chemistry battery.

There is a misconception that you can't use all of the rated capacity of lead acid batteries.

Sure, their life is shortened by 1/2 if drawn down constantly but you only need 1/2 as many batteries.

Using 50% of AH capacity is a compromise between longer life and replacement frequency.

Lithium has a much higher amount of cycles in them. ( 3000 to 50000 ). That's why you can routinely run them down to 10% state of charge.

[Chuck Q]

Bought mine from Discount Marine, 210 AH, $1250. Arrived in 5 days, UPS free shipping. Works great, replaced 6 GC2s.

[rfg9585]

Originally Posted by tmandoug1

Does100ah on that battery equal the 225ah of the interstates? What was the cost of each battery?

The lifepo I reference at Eastar is 400ah, and they will deliver to door for 1300. So I guess in terms I understand its about twice the real capacity of the interstates.

[rfg9585]

Originally Posted by Chuck Q

Bought mine from Discount Marine, 210 AH, $1250. Arrived in 5 days, UPS free shipping. Works great, replaced 6 GC2s.

Can you post the link to them. Can't seem to find what you reference.

[Winterbagoal]

Originally Posted by tmandoug1

Does100ah on that battery equal the 225ah of the interstates? What was the cost of each battery?

You could say "sort of".
The 100Ah capacity of the lithium batteries can usually be fully utilized if necessary, at a fairly consistent output current level, without doing damage. If you run them to zero, it's recommended that you remove any loads and recharge asap.
The 225Ah 6V batteries can usually be run down to around 50% without too much harm to the batteries or number of d/c cycles. So that would equal around 112.5Ah which is pretty close, althought the output voltage/current characteristics of the FLA to tend to get weaker as it gets drawn down.
That's why your lights may dim a little, as you draw down a FLA battery, and not so much with the lithiums. Also, the lithiums will probably recharge as much as 4 times faster than FLA, with similar charging currents.
I am not an electrical engineer, so this is "as I understand it", with my recently acquired, but very limited knowledge of the subject.

To the OP: I see 100Ah as the capacity of that battery listed in the specs sheet. Not sure how you're getting 400Ah?

[rfg9585]

Originally Posted by Winterbagoal

You could say "sort of".
The 100Ah capacity of the lithium batteries can usually be fully utilized if necessary, at a fairly consistent output current level, without doing damage. If you run them to zero, it's recommended that you remove any loads and recharge asap.
The 225Ah 6V batteries can usually be run down to around 50% without too much harm to the batteries or number of d/c cycles. So that would equal around 112.5Ah which is pretty close, althought the output voltage/current characteristics of the FLA to tend to get weaker as it gets drawn down.
That's why your lights may dim a little, as you draw down a FLA battery, and not so much with the lithiums. Also, the lithiums will probably recharge as much as 4 times faster than FLA, with similar charging currents.
I am not an electrical engineer, so this is "as I understand it", with my recently acquired, but very limited knowledge of the subject.

To the OP: I see 100Ah as the capacity of that battery listed in the specs sheet. Not sure how you're getting 400Ah?

I think the 100ah is referring to the cell used. The total capacity of 400ah, somewhere on the spec sheet.....

[Winterbagoal]

Originally Posted by rfg9585

I think the 100ah is referring to the cell used. The total capacity of 400ah, somewhere on the spec sheet.....

OK, so it's made up of 4 X 100Ah cells? = 400Ah?
Got it, I didn't notice the "cells" versus "pack" info, just read top to bottom. My bad.
Nice that they say the pack dimensions can be customized. Handy for those of us who might be "battery bay space" challenged.

[Chuck Q]

Found it on ebay. Gave me a 8 year full term warranty then 40% off after that. Don't know how to post the sight. But try wee.discountmarine.com.I will look up the phone ##

[Chuck Q]

Originally Posted by rfg9585

Can you post the link to them. Can't seem to find what you reference.

Sorry, it is affordable marine, in south texas.

[Itinerant1]

It does say in "cell" section 100ah @ 3.2v, to get a 12v battery the cells would need to be 4 in series 100ah @ 12.8v.

The "pack" section shows 4p4s, 16 cells make up the battery?

19.6" x 9.3" is the size of the battery which seems small for 400ah.

The pdf for the battery seem confusing, chinglish logic?

For 4 cells to equal 400ah @ 12.8v they would need to be 400ah cells @ 3.2vpc in series.

[Winterbagoal]

Originally Posted by Itinerant1

It does say in "cell" section 100ah @ 3.2v, to get a 12v battery the cells would need to be 4 in series 100ah @ 12.8v.

The "pack" section shows 4p4s, 16 cells make up the battery?

19.6" x 9.3" is the size of the battery which seems small for 400ah.

The pdf for the battery seem confusing, chinglish logic?

For 4 cells to equal 400ah @ 12.8v they would need to be 400ah cells @ 3.2vpc in series.

Did you also note some of the "cautions" in section 9. Some of them sounded odd to me, but maybe it's in the translation.
The pic at the end shows a battery with "12V 300Ah" on it's side panel.