LF280K version 3.
- Thread starter Sam Cho TX
- Start date
Alkaline
Solar Wizard
Alkaline
Solar Wizard
Version 3 is doing 311 AH and 1 KWH according to sfk.
Alkaline
Solar Wizard
post pics of the cells thx.
20a discharge isn’t bad.
Did Eve spec a suggested discharge current for these?
At this point why are they even calling them K cells, time to move on, seems like the K version reputation is already tainted.
Alkaline
Solar Wizard
I'm just wondering how this is going to play out... all grade B 280K V3 buyers will basically have a free pass to LMAO at anyone who bought grade "A" 280K V2... ?
standard discharge (at which battery should be tested) is usually 0.5C, so 140 Amps. I don't have such loads or tester
grade A, grade B... in this case it is not easy to distinguish(but should we ever bother about this?). Eve has B marks on qr of some grade B cells for some time .
Mine have no marks, just original qr codes.
The only cryteria, maybe, is be presece of EVE test sheets.
QRs are on the same place where they should be and read well by qr scranner. Codes are different from cell to cell. I have checked under cover and have not found scratched codes in other places.
Sam Cho TX
Solar Enthusiast
Looks like they are 2 versions of the 280K V3 1 with the EVE 2 hole adapter and the circular pads and ones with the octagon pads. Sfk says the octagon are testing higher but only about 10-12 ah.
Sunny Day
Member since: 1985 Post Count: 3
There’s a whole bunch of LF280k threads and I don’t know which one to add this question to, so I will try here. LF280k v3 has the reputation of delivering more capacity than the rated 280Ah, but how much more? Does anyone have a good handle on the max, min and typical capacities reported on the forum for this particular (v3) version of the cell?
Drunkin Solar
Solar Enthusiast
I have the Eve LF280k v3 in a 24v pack that has been in service for 2 months now. I have not bench tested these cells but after closely watching the pack and doing the the math I am getting at least 305 ah from them.
Have seen testing reporting 315 ah.
Have seen testing reporting 315 ah.
Sunny Day
Member since: 1985 Post Count: 3
Thanks. Interesting video from @Sam Cho TX above. I wonder if there is still a capacity difference between dual terminal connection pad v3 cells and octagon terminal pad ones.
Sunny Day
Member since: 1985 Post Count: 3
The reason I’m asking about capacity is I’m looking at this listing which claims 316-324Ah and wondering how believable it is. Are those even v3 cells pictured since they have neither of the two alternative terminal options mentioned in @Sam Cho TX ‘s SFK video above?
Brucey
Velcro Man
I believe nkon is a reputable vendor.
My understanding is this "excess" capacity over nominal rating dissipates over the first few hundred cycles or so?
My concern is more totally lifecycle counts, I don't mind just nominal capacity if it's good for 5000 cycles as an example.
Sunny Day
Member since: 1985 Post Count: 3
Ok thanks - I had not heard that the capacity above 280Ah is short lived. Tbh I’ve paid no attention to all the LF280k chat as I never expected to be interested in ordering any. But now I am, because that €60 price point is quote tempting - if they are real.
Drunkin Solar
Solar Enthusiast
Mine are the older style with a single post. Highly doubt there is much capacity difference between those two versions of the same cell.
Sunny Day
Member since: 1985 Post Count: 3
There shouldn’t be, but the video shows that in the early days of the v3, there were two distinctly different capacities of the “same” cell. It’s unclear if that situation still persists but I am hoping some forum members know something about it.
I just got the dual pole EVE V3 cells marketed as 304Ah some months ago. Now I realized that instead of a 12V system, I would liek to go directly to a 24V system and get 4 more cells.
Do you think I can connect the dual pole 304Ah and the slightly newer 280Ah in series? According to the video above the lower rated 280Ah seems to actually have more capacity so it shouldnt really matter?!
Do you think I can connect the dual pole 304Ah and the slightly newer 280Ah in series? According to the video above the lower rated 280Ah seems to actually have more capacity so it shouldnt really matter?!
Alkaline
Solar Wizard
Pretty sure all V3 are the 310AH range now, looks like eve had some "v2.5" cells. Of course you are probably never going to see the 310, more than likely about 305 or so on tester like the ZKE, and closer to 300AH with an actual BMS.
But the future of the 280K looks bleak, I think the MB30 and MB31 will essentially make it obsolete. Now the trick is the find a vendor that doesn't have the paper tiger terminals that are on the 18650/eel/nkon cells. Doesn't look like SFK is going to be carrying them looks like they made their bed with REPT 320s.
So yeah 280K, you could have been great but you left a bad taste for early adopters, and EVE in general for me at least...
But the future of the 280K looks bleak, I think the MB30 and MB31 will essentially make it obsolete. Now the trick is the find a vendor that doesn't have the paper tiger terminals that are on the 18650/eel/nkon cells. Doesn't look like SFK is going to be carrying them looks like they made their bed with REPT 320s.
So yeah 280K, you could have been great but you left a bad taste for early adopters, and EVE in general for me at least...
Sunny Day
Member since: 1985 Post Count: 3
I would not suggest putting 4 x LF280k in series with 4x LF304k (if that’s what you have?). Why not get four more of the same cell, that’s a better idea?
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