Description
Details
Max discharge rate: 280A
Size: 72 mm x 207 mm x 174,5 mm without terminal!
The cells have a lifespan (up to 80% capacity) of 9000 cycles when used at a pressure of 280-320kg and charge at 0.5P up to 3.55V discharge at 0.5P to 2.8V
P is comparable to C, 0.5C means a constant current discharge so that the battery is depleted in 1/0.5=2 hours.
0.5P means a constant power discharge so that the battery is depleted in1/0.5=2 hours
As voltage drops during discharge 0.5P discharge has little lower current than 0.5C when state of charge of the battery is high and higher current when battery is getting depleted.
Capacity tested
Nominal capacity 280Ah. All cells from this batch are tested above 300Ah! Average capacity 313Ah. Capacity report available.
Additional Information
Details
Reviews
Customer Reviews
- good Review by Stevie
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I using 16 of this batteries for a 50V home accu in combination with solar panels. Each day charging, in the evening discharging.Rating
The inverter is 5kW max, so charging current about 60 to 70A, discharging sometimes 100A.
But since we have this batteries, no main is needed. (Of grid now). (Posted on 10-09-23) - Maximum satisfaction. Cells OK. Fast delivery. Thank you. Review by Dan
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The cells have a capacity of 300+ Ah.Rating
No deformations.
No problem with balancing.
The initiation of 16 cells with a 20A /3.65V charger took a few days.
All OK. (Posted on 02-06-23) - between 306ah and 312ah for 16 cells Review by Gabriel
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Pretty good packaging, evrything works as expected, until now.Rating
no deformation and all cells were pretty close in volatage.
needed 20H of balancing with 3A for 16x300ah, not that long. (Posted on 24-05-23) - Good cells, nice price, delivered to Ukraine in 2 weeks Review by Ihor
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Received 8 cells, tested them with charge up to 3.65V and discharge up to 2.8V. I got 302Ah in 4 cells and 304Ah in the other 4. I think that if I discharge to the allowed 2.5V, it would be even more, but it makes no sense, because it is clear that the cells are good and I don't want to damage them with a deep discharge. Cells have no geometric deviations. (Posted on 26-04-23)Rating
Write Your Own Review
B-grade cells are cells usually did not qualify as A-grade by the manufacturer. This may be due to optical imperfections, higher self-discharge, lower capacity and/or higher internal resistance. Unfortunately manufacturers don't tell which aspects or aspects are the reason to mark a a specific cell as B-grade. We have sold several and get seldom negative feedback. We tested several eve B-grade and one had about 2% lower capacity, the other ones we did not find a difference with A-grade cells. We don't advise B-grade for high performance electric vehicles but for home energy storage they will work fine. In case you get one which performs significant less than the others like lower capacity, high self-discharge or fast wear we will replace it. Take care that we don’t put a lot of trust in a simple test of a single cell, if you buy 16 cells and you test them and they are all 6% lower than expected then your test gives to low results. If you buy and test 16 and 15 cells give you 100% and one cells gives 5% lower results then we will replace one. When we buy cells the cells are tested for voltage and internal resistance. Also a couple of every batch are tested for capacity, and if one gives less than 100% capacity we test the whole batch and discard the bad ones or don't buy the batch at all. Lot of seller in china buy B-grade cells, test them, even swap qr-codes and sell the good looking and performing as A-grade cells. We believe our B-grade cells are the same as lot of A-grade cells from China, including the well known resellers there with good reputation. We give regular warranty on these cells (at least 2 year).
