Pro Power 12V 100ah Lithium Ion LiFePo4

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Re: Pro Power 12V 100ah Lithium Ion LiFePo4

Postby Gordon-Loomberah » Fri Jul 22, 2016 4:31 pm

John1970 wrote:Here's some I was looking at on fleabay,...


I'd be a bit concerned about the first one, since it is configured as: "Combination method 6P4S"

which means you have far more cells than you need, ie more chances of one failing- it's equivalent to using lots of 12V car batteries instead of 2V cells to make a large capacity battery.

The 2nd one would require extreme caution when connecting, since the unprotected + and - terminals are so close together.
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Re: Pro Power 12V 100ah Lithium Ion LiFePo4

Postby John1970 » Fri Jul 22, 2016 4:36 pm

I can see the logic in buying four sets of 4x50Ah instead of just four 200Ah units, if one Battery fails a string or series can be disabled and the setup can keep running at a lower capacity using the other 3 strings (150Ah)
Something for me to keep in mind before I purchase :)
Last edited by John1970 on Fri Jul 22, 2016 5:00 pm, edited 1 time in total.
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Re: Pro Power 12V 100ah Lithium Ion LiFePo4

Postby John1970 » Fri Jul 22, 2016 5:00 pm

I'd be a bit concerned about the first one, since it is configured as: "Combination method 6P4S"

which means you have far more cells than you need, ie more chances of one failing- it's equivalent to using lots of 12V car batteries instead of 2V cells to make a large capacity battery.

The 2nd one would require extreme caution when connecting, since the unprotected + and - terminals are so close together.[/quote]

Gday Gordon, My current AGM's are 12v connected in series in the same way I would run the 12v LiFeP04 Batteries on fleabay, the ones advertised are supposed to have their own inbuilt BMS to balance the cells and high/low voltage cut off. I would also use my Battery balancers to try and keep each Battery the same voltage and tweak the settings of the inverter/charger for float and cut off voltage.
So to cut a long story short use this type of LiFeP04 Batteries in series like 12v AGM, flooded, gel lead acids
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Re: Pro Power 12V 100ah Lithium Ion LiFePo4

Postby dRdoS7 » Fri Jul 22, 2016 6:09 pm

Hi,

Gordon-Loomberah wrote:I'd be a bit concerned about the first one, since it is configured as: "Combination method 6P4S"
...
The 2nd one


I think you mean 2nd & 3rd.

3rd battery has a switch, to allow connecting. An Anderson plug would be a better option though.

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Go on, delete that quote! :lol:

[Moderator - quote edited, not deleted as requested :lol: but yes you are correct, 2nd and 3rd- I only looked at at the bottom 2 links ]
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Re: Pro Power 12V 100ah Lithium Ion LiFePo4

Postby offgridQLD » Sat Jul 23, 2016 10:35 pm

Often when you see a 12v lithium (lifep04) battery advertised that looks like a regular 12v AGM battery 100-200ah. What they actually do is purchase raw new plastic 12v lead acid battery cases and place 4 x 3.2v 100ah cells from Calb, Winston, synopoly or the like inside the case connect them up as a 12v bank and wire the cells into the terminal posts on the case.

If you were to crack the top of the case you would just find 4 cells inside. I have seen inside a few of them in person.

While the format might look familiar (same as a old 12v AGM case) your most likely wasting space and weight doubling up on packaging. You sure are paying a very big premium over purchasing the 4 raw cells and wiring them up.

If you watch this video you will see what I am talking about.
https://www.youtube.com/watch?v=NDgQvc0PgdM

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Re: Pro Power 12V 100ah Lithium Ion LiFePo4

Postby John1970 » Wed Jul 27, 2016 12:57 am

When I looked at the 12v Winstons they were pretty cheap I thought, I think it was ev power I asked about them but I might be wrong? They told me the Winstons don't have any built in BMS or cell balancer. The ones with that are more expensive.
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Re: Pro Power 12V 100ah Lithium Ion LiFePo4

Postby davidg » Wed Jul 27, 2016 7:25 pm

John1970 wrote:The ones with that are more expensive.


A lot more expensive :shock: lookup the "mastervolt" system price, in GEL is bad enough but lithium, that'll make your eyes water at the price of their system
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Re: Pro Power 12V 100ah Lithium Ion LiFePo4

Postby dRdoS7 » Sun Aug 21, 2016 10:34 am

Hi,

John1970 wrote:Here's some I was looking at on fleabay, and a little looking on Google brings up their own or other selling websites: http://www.ebay.com.au/itm/281260837468 ... EBIDX%3AIT


I was having look at this listing, and on close examination, I found their "SPECIFICTAIONS" :lol:

specifictations-forum.jpg
specifictations-forum.jpg (32.85 KiB) Viewed 592 times


Must be like specifications, only ficticious?

Gave me laugh.

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Re: Pro Power 12V 100ah Lithium Ion LiFePo4

Postby Adam T » Wed Sep 14, 2016 7:18 am

If you are going the LiFePo4 approach make sure that you adjust your charge controller voltages to suite. You cannot just wack them in and charge them the same way you did your Gel batteries. It will work, but your battery life will be short. If your cannot change the Start, Stop and float change than you either need to get a different charge controller or stick with lead acid.
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Re: Pro Power 12V 100ah Lithium Ion LiFePo4

Postby dRdoS7 » Tue Sep 20, 2016 8:02 am

Hi,

Adam T wrote:If you are going the LiFePo4 blah blah blah or stick with lead acid.


(see ^^^: no full quote! "I learn!!!")

I'm fairly sure anybody who goes for LiFePO4, would have researched before they went ahead and bought some. At least I hope they would, given the cost.

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