I, like a few other posters recently (here,here, and here), saw these 90Ah LiitoKala cells on AliExpress for about $50 each and decided to take the plunge! My cells have arrived, and I figured I would post about my first impressions. I am by no means an expert in these things, so I'm interested in any helpful tips. I ordered 8 cells for a 24V / 2.2kWh system. All tests and charging was performed with an OverKill solar 8S BMS. Total cost with BMS was ~$500.
In the box:
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I am almost done with the capacity test. They've, at this time, output 83Ah and are still at 25.1V. It seems the rated capacity is correct, but I will update when the test is over. I have attached photos. Let me know if there is anything else you'd be interested in testing.
In the box:
- Cells came packaged individually, wrapped in foam several times, in their own boxes. No damage, although cell bottoms were unprotected by the foam I suppose.
- 8 cells came with 8 bus bars, sufficient for 8s configuration but insufficient for parallel connection (for cell balancing).
- Bus bars are tinned copper, but pretty thin. Probably insufficient for high amperage situations as is, might want to double up.
- Screws/washers included for bus bars are fine, threads look fine, everything goes together smooth.
- All batteries arrived at 3.303 volts, within couple millivolts. At a guess, 50% SOC.
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I am almost done with the capacity test. They've, at this time, output 83Ah and are still at 25.1V. It seems the rated capacity is correct, but I will update when the test is over. I have attached photos. Let me know if there is anything else you'd be interested in testing.
