Recent content by sstephan

that's what i'm thinking also , but then i have a different issue . let say you have 2 packs , each is 16s with 100A bms , so in total you should get 200A . in reality it's almost impossible to draw 200A with this arrangement because the current wont be balanced 50/50 between the packs . is...

i saw this "1000A" listed on aliexpress without any wiring diagram or documentation . asking them questions is like talking to myself . anyone know what do they mean ? is it external relay (instead of mosfet switches) ? few more questions ... what is the best practice when connecting several...

i used those batteries before and still have some 7s 24v modules .the threaded rods just hold the pack housing assemblies together , no pressure is applied to the actual batteries .

Sorry for hijacking, I see the consensus here is to top charge all cells until the current drops to "0" for preliminary balance. I know that cells degrade faster at higher then 80% soc. In this method you're keeping the cells at close to full soc for days. Is it really the best option? Why not...

currently the plan is to make 16s / 48V pack . at first stage i plan to put few panels on a pergola , 60a mppt charger and 3kw inverter . i'm also building my own diy 2 stage inverter (48v -400v dc , then 400v dc to 240ac) . if all goes well i'll probably add more batteries and solar panels on...

i used electronic load for discharge with 4 leads , so the voltage measurement is directly from the cell and not influenced by current draw . second cell tested at 104.2ah i bought them from litokala aliexpress . those are probably rebranded eve cells , don't know exactly what's "wrong" with...

I got 94.6ah out of the first cell. Don't know if its good or bad for aliexpress quality. I discharged with 20a cc 2.5v cut off. I guess with lower discharge it could be a bit more.

i have a power supply i can use to charge up to 48Ac , but no cut off current adjustment . also what is the best way to test capacity - constant current , constant power or simple resistive load?

hello guys (newb alert) i bought some "grade a 105ah" lfp cells from aliexpress and want to do capacity verification / match before i assemble them into a pack . The problem is , i never fully charged / tested large capacity cells . I just hooked up one of the cells to my isdt charger , set...