Recent content by Overmind

According to this official site: https://www.evemall.eu/goods/LF304 The 304s have higher capacity, lower resistance and standard 4k number of cycles. The 280ks have lower capacity, higher internal resistance and 8k number of cycles.

I know they don't openly sell. We get them from gray market. Anyway, just tested one of mine at 36A discharge and it shows over 313Ah from 3.65 to 2.65V. I'll probably mount them today to my solar if everything goes well. I can also QR-code scan them if that helps with anything; it may provide...

Hello @houseofancients I doubt original CATLs are grade B EVEs since CATL is the larger company.

I disagree with some of the above mentions. No, UPS batteries are not AGMs, they are SLAs. Check with APC if you don't trust that statement. Most UPSes, including APCs, float the lead acid 12V at exactly 13.6, which is exactly 3.4V/LFP cell. If some UPS floats it at 13.8 that's 3.45/LFP cell...

Dismount all of them, connect them in parallel and see if the one with low voltage recovers. Disconnect them once they get to 12.6V or around there and check if the assumed to be bad one keeps that voltage or drops back low lower values. Alternatively, manually charge the low voltage one to the...

I use Megaval/Midval/vicron or any 125A auto fuses brand for most battery packs. Up to 100Ah you can use one, for more, you can use 2 in parallel. They are solid and easy to mount. Why not circuit breaker? Well, actually there's no need for it on the battery pack. You should have the BMS that...

Hello @Brandonlucky, what discharge current did you use in your test? I will soon test these cells myself, but at high current values (40-65A or around there).