7 AWG you need 4.
EVE LF280K 16S JK B2A24S15P-CAN
- Thread starter Delphinus
- Start date
I prefer to crimp 4, but some use only 2 of a larger section because they are easy to connect.
Yes i guess i would use only 2 also. What terminals should i buy for the 16 bms wires?
Pink
Still not fully charged. If you want to really want know how balanced cells are need to push total voltage to 55-56V. Most full time active balancers are set not to activate when cell voltages are less than 3.4V
Forget what the QR code says, can you get the EVE testing report for that same cell that tested 266.3AH?
You can ask NKON for it, look attached for example.
Attachments
I ask them for the LF105 and they didn't send it and I decide to not waste time asking again, the 266.3Ah was because the electronic load has a bug in the software, I measure some cells after and I got the 280Ah.
I'm waiting for summer when I will produce extra energy and will stop one battery at time and measure the cells that are higher and lower.
Ok thanks, so do you recommend those 280K grade A fron Nkon? or should I look into another manufacturer? I keep reading that the 280K is having issues even if grade A
I recommend NKon and the LF280K if I could I would sell my 32 x LF105 and buy another 16 x 280K, everyday I fully discharge my batteries and the cells are very stable the only one I have running is number 7 because by mistake I skip it when giving the final torque, so good cells are important but also how you connect them.
When I can I will top balance the number 7.
Sleeper85
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Some grade A 280K test, again disappointing, for the price I would have expected much better! I'll wait to see what Delphinus gets but it seems he too has some issues
anyway:
My Results 278.4 & 901.4 WH, Luyuan Test Report said I should be getting 289.4 AH on these Matched & Batched Cells Genuine grade A:
https://diysolarforum.com/threads/what-is-going-on-here-just-got-zke-40.49076/
shane_Uk with Luyuan Genuine matched & batch results 276 AH vs the 289 Ah on the sheet; did not show WH, but I suspect it would probably be around 900 or more:
https://diysolarforum.com/threads/opinions-welcome-for-newbie-lifepo4-battery.47310/
18650batterystore.com grade A results, a person named Dena M. Says 277.7 AH (did not show WH, but again I suspect it would be around 900ish maybe 901):
https://www.18650batterystore.com/products/eve-lf280k#looxReviews
Fogstar UK grade A EVE 280, Cajocars gets 280.5 AH & 907.5 WH EVE stated Capacity was supposed to be 293.9 AH…, but still first person with a 280K to actually break the 280 barrier…but just barely
https://diysolarforum.com/threads/just-bought-16-280ah-a-grade-from-fogstar.51027/page-3#post-662021
So you can see Grade A 280K barely makes 280AH and but it makes about 900WH so barely meeting spec...
I've seen Andy test LF280K cells a lot with the ZKE EBC-A40L tester and often the results showed 280Ah or more.
Andy shares his results on his site : https://off-grid-garage.com/battery-data/
A parameter which is not given in all these tests carried out by forum members is what was the temperature of the cells during the test?
The ideal temperature should be 25°C.
I myself have new grade A LF280K cells from Luyuan with tests report, I have not used or tested them yet. Maybe I should buy a ZKE to do it...
Alkaline
Solar Wizard
The new V3 280K cells have fixed previous problems with them.
Sleeper85
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I'm just in the process of placing an order for LF280K V3.
But Andy's tests do not concern LF280K V3.
Sleeper85
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Some grade A 280K test, again disappointing, for the price I would have expected much better! I'll wait to see what Delphinus gets but it seems he too has some issues
anyway:
My Results 278.4 & 901.4 WH, Luyuan Test Report said I should be getting 289.4 AH on these Matched & Batched Cells Genuine grade A:
https://diysolarforum.com/threads/what-is-going-on-here-just-got-zke-40.49076/
shane_Uk with Luyuan Genuine matched & batch results 276 AH vs the 289 Ah on the sheet; did not show WH, but I suspect it would probably be around 900 or more:
https://diysolarforum.com/threads/opinions-welcome-for-newbie-lifepo4-battery.47310/
18650batterystore.com grade A results, a person named Dena M. Says 277.7 AH (did not show WH, but again I suspect it would be around 900ish maybe 901):
https://www.18650batterystore.com/products/eve-lf280k#looxReviews
Fogstar UK grade A EVE 280, Cajocars gets 280.5 AH & 907.5 WH EVE stated Capacity was supposed to be 293.9 AH…, but still first person with a 280K to actually break the 280 barrier…but just barely
https://diysolarforum.com/threads/just-bought-16-280ah-a-grade-from-fogstar.51027/page-3#post-662021
So you can see Grade A 280K barely makes 280AH and but it makes about 900WH so barely meeting spec...
I just tested a Luyuan Tech 16S LF280K v2 grade A pack. I tested the full pack but not the individual cells.
Here is the report provided by Amy Wan.
The testing procedure is as follows:
- Charge and balance at 3.45v/cell
- Charge at 3.55v/cell
- Discharge (2440W for 6h) and stop as soon as a cell reaches 2.7V (I don't want to go too low)
JK-BMS, Junctek Shunt and Deye inverter were monitored in Home Assistant (lots of graphics available if you want).
Here are the shunt results:
- Total Ah: 279.24Ah
- Total kWh: 14.360 kWh ( 897.5Wh/cell )
I therefore conclude that the cells are all 280Ah and more.
Personally, I'm satisfied with the result even if it is far from the test report provided by Amy (I don't know where these data come from?).
PS: I will soon receive LF280K v3 grade A
JK-BMS charge at 3,45v/cell | JK-BMS charge at 3,55v/cell | JK-BMS discharge at 2,7v/cell |
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Last edited:
featherlite
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Sleeper85
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Yes that's the only thing I did when I received the cells but I don't have time to test it individually.
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