₦airaland Forum

Update on my 865w indoor and outdoor power station.
Comprising of 90 cells (3.7v 2.6a ~ 9.62w)
Brass Terminals.
12x12 adaptable box.
Wires.
Bms.
3s battery equalizer (balancer).
Switch.
1500va msw sachet inverter.
Handle.
Voltmeter

Note: All parts except Switch and wire were bought from one of us here @tetralogyfallot

cutefy:
Good day house.

Please where can I get this LiFePo cells.

Contact valto

Currently building 4 portable and movable powerstations.
2 12volts. 1.5kw and 865w
2 24volts. 2kw and 1kw.

psucc:
This thread had the last update on the 7th of March, 2025. Please, gurus in the house, how busy are you to allow this thread suffer so much?
@Tetralogyfalot
@OfficialFestus
@Intellab
@Okikisgm
@saint2ace
@Dollarnaira

And others

I've been busy to update the thread lately, but I'll be doing that soon.

Jeshurun101:
I tried yours but its showing u re not registered with pi app. Not just only number, few numbers like that.




Modified: Fixed! I have added and followed you.

Alright, thanks.

Jeshurun101:
I have virtually followed and sent friend request to those that posted their usernames before this post. Endeavour to reciprocate so that we can grow together.

My username is NOBLE4PEACE

For those that will comment after this post, indicate if you have followed and sent friend request.

officialfestus

Richnero2:
I just followed and sent you a friend request. My username is Richnero

I followed and also sent you a request, kindly do same @officialestus

LofP:
@op I just followed you and I sent you a request. Please follow back.

"Olarolls" for others who would like to follow and be followed.

I followed and also sent you a request, kindly do same @officialestus

ThorOdinson:
tweeze2

I followed and also sent you a request, kindly do same @officialestus

ruggedtimi:
timi2times

I followed and also sent you a request, kindly do same @officialestus

jacarantha:
Send requests to Jay23401.
I'll follow back.

I followed and also sent you a request, kindly do same @officialestus

quincee88:
I recently came across a YouTube video on how to boost pi mining rate. It's quite simple, from your pi browser, click on profile, then accept any pending request, and also send out requests by entering someone's pi username, equally follow this same pi user. As we build followers and friendship, it increases our mining rates so far this friends and followers are actively mining. Pi is all about the COMMUNITY.

My pi username: christy369
Send me a request from your pi browser and equally follow just as explained above, I follow you right back. This way, we build a strong community and mine with higher rates. It's a win-win for all.

Please also drop your pi username, that way, we all add up and follow each other

I followed and also sent you a request, kindly do same @officialestus

JOACHINpedro:
JOACHINpedro
I will follow back

I followed and also sent you a request, kindly do same @officialestus

Intellab:
Where did you buy the battery holder? I need 620 pieces.

I bought them from Aliexpress.

saint2ace:
What was the SOC of both batteries before you connected it? Cos if there's a difference in the SOC, power will move from high to low as stated by dollarnaira. Standard practice would be to charge all battery cells to a voltage of 4.2v, let it rest for awhile then weld together.

The SOC of all cells are different, some are 3.9v, 3.2v, 3.5v and 4v.

okikigsm:
Oga there is diff btw hot and warm o.any battery with high internal resistance is bad.

It's painful to be discovering that one or more battery is not okay after coupling,that a battery maintained 4.20v and also over a period of time does not say it's good.

It's advisable to know your battery well b4 coupling,get a battery tester,this does that.

how much is it?

dollarnaira:
Very normal.
Moving and exchange of electrons from higher ones to lower ones in splits of seconds. The journey dey hot oo as internal resistance differs.

greetings sir, thank you very much, I was thinking the cells were bad.

Is it normal for cells to get hot a bit after connecting them in parallel?

Below is the picture of the cell.

dollarnaira:
Ok
But how did arrive at 865w?
Note that they can't be 2.6ah again since they are no longer new.

Probably they are now 2.2ah or 2ah.

W = 2.2×25×11.1= 610.5wh

they are still 2.6ah.
30p 3s.

dollarnaira:
This thread is NOT for ADVERTS but strictly for diy experience under building safe lithium ion battery packs. Cylindrical LifePO4 diy also included.

so this thread is more than a year now, I was thinking it was created last year. 😅

dollarnaira:
Are these LG 3.2ah cells?

no sir, they're 2.6ah.

12v 3s 865w.
Just completed it.

eghos12:
Please who has 3s 40a bms for sale. Mine just stop charging

I have 60a.

Penuelseun:
you are charging them at 0.4c which is high unless your cells are designed to be charged that fast

I don't think they are, because they get very hot whenever I'm charging them with the 24v 7s 20a charger but charges quick.

dollarnaira:
Too too high.
Nothing kill cells than fast charging.
Fast charging no good bros. Avoid it.
Do 28.5v at 8a if ur charger is editable. Always compare ur system to a 3s. At 12v 3s 50a, I will charge at 8a max.

I don't charge above 20a in my 200ah 12v 3s backup system.

Try fill up a car radiator with a rushing water, it will only pretend to be full. Speed at times is a killer.

OK sir, but my charger doesn't have an editable settings, except I'll use a bulk converter to limit its amps and voltage.
Thank you.
I'll try it and update the forum about it.

I don't think is advisable to build a pack of 24v 7s below 100a.


Recently built a pack of 24v 7s 50a.
I noticed they're always very hot whenever I charge them using a 29.2v 20a lithium charger.
Could it be the cells are bad or the charger is killing the cells?

P!gs

ZeroSpace:
Ain deal

iPhone 16 128gb physical plus eSIM
Brand new
1.250m

iPhone XR 128gb
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250k

Samsung Galaxy Tab A9
Brand new sealed
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MacBook Pro 2020
I5
256gb SSD
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78bh
Green line on screen
Crack back
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07086581363

Xsmax 100k?