₦airaland Forum

iCauseTrouble:
Please, is there a way to test for bad / fault battery in an inverter system? I noticed that my Eastman tubular battery bars in my inverter drops from 4 bars to 3 bars immediately it stops charging or when light is taken.
The batteries are less than a week old.
Also, is there a way to confirm the genuineness or authencity of batteries?

I hope your tubular batteries were equalized after the installation. That's always the first step before the usage because the batteries may have spent quite a longer time in storage.
After dropping from 4 bars to 3, it would take longer time to drop further to 2 bars with an average loads. If it doesn't, then you need to break down the lead sulfate on the plate through equalization charging.

I need a good 3kva 48v transformer based inverter.
Any review on 3000w 48v sachet inverter?

iCauseTrouble:
I bought 4 EM220SS eastman batteries but I didn't see warranty cards inside? Does it mean they are fake?
How do I verify the authenticity of my batteries?

You should have discussed about the warranty before purchase.
You may not be able to verify the authenticity.

Dam5reey1:
Well, Pylontech server rack packs is just an assembled Lithium ion phosphate batteries.

They have 48V 15s Variants and newer ones with 51.2V 16s.

48V is designed for old inverter systems, that don't support editable voltage configuration..

As inverter has evolved overtime to be smarter, 51.2V is the new 48V.

Now Chinese capitalised on this.......... To be continued

Thanks for your input.

twinskenny:
I am just an installer! Will ask the client for review

Okay sir

twinskenny:
Just did another one today ! Working perfectly well

Good business I must say.


16 550 watts Jinko panels
10kw pylontech lithium battery
5kw Growatt hybrid inverter

Having used the pylontech battery for a while now, could you please share your general experience in the following areas?

1. Performance compared with lithium phosphate battery
2. Cost effectiveness of pylontech battery compared with lithium phosphate battery, putting energy storage (kWh) into consideration. That's 15 cells for pylontech Vs 16 cells for prismatic.

I'm asking to get practical/reliable information from your usage and this will enable me to give a customer who wants to buy it a sincere information/advice.
Pylontech battery nominal voltage is 48v while lithium phosphate battery nominal voltage is 51.2v.
How compatible is pylontech (mainly of voltage) with the connected equipment like inverter?
What is the major difference between pylontech US series and UP series?
Thanks

odimbannamdi:
Thanks for the response, but i am not sure you understood my question.

I asked: if the price difference between Grade A and Grade B is neglible, why then would anyone choose Grade B over Grade A?

Also, how would you define "heavy loads"? Give us an idea of the Watts rating that define heavy loads. And do you imply that if one doesn't regularly power such heavy loads, he can get away with Grade B?

I am asking all these questions because of the dust these arguments of Grade A and B has raised recently

Boss, the price difference between Grade A and Grade B is negligible with 20usd different for 280ah? I will like to know your purchase source for Grade A.
Some Grade A cells have 0.5C/0.5C charge and discharge rate while some have 1C/1C charge and discharge rate.
Putting either 0.5C loads on the cell with the 0.5C datasheet specification and Putting 1C loads on the cell with 1C datasheet specification is what I mean by HEAVY loads.
About 90% of grade B cell users put a max load of 0.3C on their cells.

odimbannamdi:
For our learning; the price difference between a grade A and grade B 125ah Eve cells is just $4. I believe this price difference will be similar for higher spec-ed cells.

What then could be the motivation in going for Grade B or A aside from price, which is nearly negligible

1. Quality
2. Durability
3. Rest of mind (You can comfortably power heavy loads withing the datasheet C rate specification without thinking about the cells deviation)

The first picture is my batched and matched Eve 105 grade A cells.
The second picture is a normal 105ah Eve grade B cells.
From the picture, they all look alike and one may not really see the difference between the two until you subject them to C rate test and observe the working voltage range/cells behavior, especially at the upper knees during charging and the lower knees during discharge.
Again, the company gave 5 years warranty for the grade A and 3 years warranty for the grade B.

Grade A came with the manufacturer test reports and grade B does not have manufacturer test reports.
I will drop more findings/results as I'm working on them.

Edrizz:
Use 10mm cable but if u thinking of adding more in the future, then 16mm cable is ur best bet

Distance should be taken into consideration...
16mm will drain his pocket ohh but it's good if the distance is much.

kristien4:
What's the design life on your lifep04 packs??

3500 life cycle.
3 years warranty.

24v 160ah 4.1kwh coupling with 2mm metal casing and Smart Jk bms 100A 1A balance current is 850k.
Coupling with HDF wood and Jbd Smart bms 100A is 800k.
24v 130ah 3.3kwh coupling with 2mm metal casing and Smart Jk bms 100A 1A balance current is 750k.
Coupling with HDF wood and Jbd Smart bms 100A is 700k.
48v 160ah battery pack available.

Dam5reey:
Motivation speaker mode
we count 1 before 2.

I'm still waiting for the 5kwh battery bank test results and the 300ah capacity test videos

Fake capacity test producer, give us your capacity test video results.

I'm here to learn and share my little knowledge and not to insult and look down on others.
Life is a race and what matters most is not when a person crosses the finish line but how strong he has grown along the way.

Dam5reey:
I am making another interesting video, you will love it!
One down! Subscribe for more insight about Lithium ion phosphate batteries!

1 The PowMr 100Ah Lifepo4 battery is rated grade A according to Linnov8/your write up. Could you please use the datasheet C rate to power the loads and give us the privilege to see the working voltage range of individual cells as they approach the lower knees of the curve?
Just as I earlier said, batched and matched grade A cells with 1C charge and discharge rate will work closely together throughout the working voltage range (3.400v-3.000v) down to the lower knees of the curve (3.000v) and no single cell will overtake others and hit the low voltage cutoff.

2. Could you please drop the video of the 5kwh lifepo4 battery powering 4kw loads and let us see the working voltage range of the individual cells as the approach the low voltage cutoff?

3. Could you please drop the video of the 280Ah cells tested 300ah in a pack of either 12v or 24v with the datasheet discharge C-rate and let us see the working voltage range of individual cells as they approach the low cutoff voltage?
NOTE: What affect cells variation most in a pack is the charge/discharge C-rate and that's why an average load is recommended for Grade B lifepo4 battery and not the batched and matched grade A lifepo4 battery. The more amps we apply on the cells, the more cell's variation we notice due to their individual IR. We experienced most of these variations as they approach the lower knees of the curve. This is the major reason most of us pay more attention to the working voltage range of the individual cells with respect to the applied datasheet C-rate specification.

osayuwamwen:
Pls is it advisable to top with distilled water at this level of gauge

Looking at the gauge level, you still have reasonable amount of water in them but any time/day you wish to top the water, make sure the battery is fully charged before you do that.

ubreeze:
Baba, I need Ur number. We need to talk ASAP abeg.

+234 809 five six seven four two six two

Abiono28:
How much is your 130Ah cell?

Sorry Sir, I don't have cells for sale now.

More revelations loading......

ojesymsym:
In humility I do want to know how you guys go about doing capacity testing. I know there is a tester they sell on Alibaba that measures the capacity of lithium but it does not sem to be what you are describing here.

Do you put normal load on it without further charging it to determine the final capacity, a step by step process would be a nice to have.

Also, I suggest you and Dam5reey1 should sheave the sword for now, no need to take anything personal. We are all here to learn and share ideas.

If you have 4 or 8 or 16 cells that you want to use to build a pack and you want to carry out capacity on these cells, don't EVER test them individually. You won't get the needed results when you later put them together.
Almost all the grade B cells come with the default IR and as such their charging and discharging behavior are different.
After the initial top balancing and equalizing, hook them up to your system and discharge them from the 3.400v down to 3.00v.
This is the working voltage range and this is where you will see the advertised AH and KWH of the cells.
If the cells are grade B, you may choose to you 0.25C or 0.30C rating for the discharge and if the cells are batched and matched grade A with the datasheet of 0.5C/0.5, you may choose to follow the datasheet specification.

While carrying out the capacity test for the two categories of cells, pay MORE attention to the behavior of individual cells, especially when they approach the lower knees of the curve.
Batched and matched grade A cells will stay closely together throughout the working voltage range (3.400v-3.000v) and you won't see any runner cell overtaking others and hit the low voltage cutoff because their IR are very closed due to the matching and batching....
Grade B cells hardly stay together, even when you reduce the loads at the lower knees... Once they approach 3.000v, one cell (runner) will overtake others and hit the low voltage cutoff.
Again, there are still quality grade B cells that will give you excellent performance and you will experience all these during the testing process.
I used Victron BMV 712 for my capacity test.

24v 160ah 4kwh for 850k.
24v 130ah 3.3kwh for 750.

Dam5reey1:
Na still screenshots.

We don't rely only on China's reports we do it ourselves, stop playing and get serious about business!

You see this capacity test, you MUST show us the video of your Brand New Grade A Cells.

If you don't know how to do capacity test to check the working voltage range of each cell and the internal resistance, let me tell you.
Put either 8 cells or 16 cells together as a pack, charge them to full and discharge them down to 3.000v each cell.
We want to see the capacity and the behavior of each cell as they are approaching the lower knees of the curve.
It took you many days to edit fake YouTube video of just one cell which you refused to paste it here.
It took me about 4 hours to carry out capacity test on 48v 160Ah 8kwh grade B Eve Cells. I finished that test not quite long. The video is here with me. I want you to drop the fake edited video before I drop mine.
I'm waiting.......

I repeat and I keep saying it here, everything about you is fake.
For the past two weeks, you've not been able to come out with a concrete evidence to defend your fraudulent activities in this forum.

I dropped a few screenshot above on your fraudulent activities and pretended as you didn't see them.
You put FREE consultation in your signature just to attract the new comers to your fraudulent Whatsapp page.

Dam5reey1:
Brand New EVE Cells available:

EVE LF280K, 3.2V 280AH
Tested capacity up to 300AH+

8 Cells and below 130K per cell
above 15Cells 125k per cell.

While video is in progress, it takes days to get test results editing video make it longer, because of time and for those interested.
Note when I say Capacity ranges up to 300AH+ it was the tested capacity not rated capacity which is still 280AH. This is one of them.

So this your editing YouTube video is not available again?

;

Dam5reey1:
Na still screenshots.

We don't rely only on China's reports we do it ourselves, stop playing and get serious about business!

.

Dam5reey1:
na wa I give up.

When I wanted you to give up you refused. You want to give up now because you perceived more revelations on your fraudulent activities are coming up.

I gave kudos to Mavor for being smart in page1657 otherwise he would have lost huge sum of money....

Dam5reey1:
I have a YouTube channel for a reason, My identity is public..

I have a day job, one jobless person is asking me to leave my career and be proving fact, not sure he even understand how coulumb counter works! And how proper testing is done. All he showed was a BMS screenshot!

You have a fraudulent day job and you're always here monitoring your the newbies to pick them up to your WhatsApp page and defraud them.
People that are very busy with other jobs don't respond to any message in this forum for a long time. Even when you drop message for them in their Whatsapp page, they don't respond on time.
This is the forum that you sleep. People should go through this forum and check your appearance.
I'm still waiting for your downloaded video. If you like edit that video 200 times, I will tell you nothing but the truth.
Every batched and matched Grade A cells MUST have manufacturer test reports. That's the reports we usually send to EV through mail for verification. EV will confirm if the report is legit or not and you will get the feedback in less than 2 days.
If it turns out to be fake reports, you can file refund claim in Alibaba and get your money back.
I'm still waiting for your Brand New Grade A cells video.

NOTE:
Two videos are required.
1. 5kwh battery bank powering 4kw loads.
2. Lf280k Cells tested 300Ah.

Dam5reey1:
Brand New EVE Cells available:

EVE LF280K, 3.2V 280AH
Tested capacity up to 300AH+

8 Cells and below 130K per cell
above 15Cells 125k per cell.

While video is in progress, it takes days to get test results editing video make it longer, because of time and for those interested.
Note when I say Capacity ranges up to 300AH+ it was the tested capacity not rated capacity which is still 280AH. This is one of them.

Forget about the graph. We can easily copy it anywhere and paste.
We need the real video. If you like edit a downloaded video 100 times. I'm waiting still.....

Those are the manufacturer test reports I received for the batched and matched Grade A 105ah Cells that I bought.
When I receive the cells, I will process them and run capacity test on them.
I will drop the capacity test results here as well.

Dam5reey1:
Share the report on dropbox or google drive for all to have access. who care about screenshots!

You don't care about the screenshot? For the past two weeks that we have been waiting for the evidence of your fake claimed products, have you drop a single screenshot to proof anything?

If you're not comfortable with my screenshot, go to court.
I will follow up your fraudulent activities in this platform and I'll keep exposing you.
You said the real movie was loading and up till now you've not uploaded it here.
You've been searching for information for the past few days...... Keep searching....