I do something similar but my bulk setting is 3.45 per cell and float is 3.4. Most of the time after bulk my pack goes into about two hours of absorb and then sometimes settles to that float voltage before the sun goes down. My inverter has loads on it during the day and is passing through the GT solar coupled to it. The concept is to end the day with a pack topped up to about 90% as I use the batteries to cover all my loads during the evening peak.
Right, this seems to be exactly my usecase. I will try this approach.
Some of mine were like that. They tested fine and have been in use for 15 months now with no problems. To me that is typical distortion of the thin walls of those cells. That is why the manufacturer recommends compression when in use.
It is nothing. Did you read my post above? Do not let perfect be the enemy of good. Do not pay attention to the comments of posters who have not used the cells before. Use the cells or test them to satisfy yourself.
Yep I made sure the cells were between 15-20°C for the whole duration of the tests.
I've completed 3 full cycles and the capacity test is the same between the first and the third cycle.
The older EVE LF280N are rated 3500 cycles @ 1c, the newer EVE LF280K are 6000 cycles @.5c. So lowering the discharge rate by one half for a little less than double the cycles.
That's why I was pointing out that EVE should really change their spec sheet.If they were sold as 270AH cells everybody would at least be getting exactly what they paid for
The cells are physically different. They are taller and the terminals are closer to the ends.
I did this search (link below) and the first image shows capacity vs temperature. It's a bit difficult to use but was the only one I found in a quick check. I also found in other threads in this forum the suggestion that rated capacity of Eve cells is at 25C. It seems that at 15-20C a cell could easily show 270 or less. See also post #5 in the second link.
diysolarforum.com
Yes this would have been better, however, I have heard some people have 280K's with 295AH capacity? I have tried to find this thread but it was one of the very first 280K threads on this forum.If they were sold as 270AH cells everybody would at least be getting exactly what they paid for
I bought 4 280k cells last week and they all swollen somewhat. Two are more than others. I fully discharged to see if swollen goes away but no, they are still swollen. For capacity test I got 269ah and 277ah the two I tested. I specifically asked Jenny Wu about if these have less than 280ah capacity as per their website and she says that’s not correct ??
Sorry to hear. I've never tested my cells individually but the whole pack (top balanced) never delivered more than roughly 267ah. So more or less the same as your low cell. They're behaving nicely though, delta is consistently below 10mv and no runners on the top. So I would have been happy with 270ah advertised.I bought 4 280k cells last week and they all swollen somewhat. Two are more than others. I fully discharged to see if swollen goes away but no, they are still swollen. For capacity test I got 269ah and 277ah the two I tested. I specifically asked Jenny Wu about if these have less than 280ah capacity as per their website and she says that’s not correct ??
