I have been using my EVE LF280K from Fogstar UK for almost a year; I tested 4 or 5 of them when new using a Zketech-EBC40L and they were all around 278-280Ah (charging to 3.65V with 14A cut off and discharging at 40A up to 2.5V).
I have been using them with a Seplos BMS, I normally charge them up to 3.5V and use an active balancer to keep them balanced.
I've done a capacity test of the entire battery by setting the low voltage protection to 2.5V (normally I would set this to 2.9V); when the first cell hits 2.5V during discharge, the voltage delta is around 0.2-0.3 V and the SoC is still around 8%. This means I'm getting only getting 258Ah of the 280Ah, and that's discharging at maximum 65A (0.2C), but with an avarage of 10A; I think the capacity EVE quotes is discharging at 0.5C from 3.65V to 2.5V.
Would it make a difference if I charged the cells to 3.65V instead of 3.5V? They are normally fully absorbed even at 3.5V: the current drops under 1A within 30 minutes.
I have been using them with a Seplos BMS, I normally charge them up to 3.5V and use an active balancer to keep them balanced.
I've done a capacity test of the entire battery by setting the low voltage protection to 2.5V (normally I would set this to 2.9V); when the first cell hits 2.5V during discharge, the voltage delta is around 0.2-0.3 V and the SoC is still around 8%. This means I'm getting only getting 258Ah of the 280Ah, and that's discharging at maximum 65A (0.2C), but with an avarage of 10A; I think the capacity EVE quotes is discharging at 0.5C from 3.65V to 2.5V.
Would it make a difference if I charged the cells to 3.65V instead of 3.5V? They are normally fully absorbed even at 3.5V: the current drops under 1A within 30 minutes.