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as the explanation suggests once the current is above a certain level (1A?) the BMS switches on the discharge fets so there are no losses. I use the same BMS, under normal conditions and regularly pull 100 amps for long periods. I Discharging 100A even if the charging is disabled and the...

Thank you mikefitz and upnorthandpersonal ! Good explanation (and I think I understand it :-) ) As I suspected, the lower voltage measured is lost in the mosfet. I also understand that it is not good to discharge too much when the BMS has stopped the charging. I have a 120A BMS. How much can I...

I have just finished installing a 500 Ah LFP-bank in my boat. It works fine, the Android BMS also (after dealing with the decimal komma issue). But I found something that puzzles me: I was testing the temp sensor. It works and close the charging at the defined temperature. Doing this, the APP...

I have just finished installing a 500 Ah LFP-bank in my boat. It works fine, the BMS also (after dealing with the decimal komma issue). But I found something that puzzles me: I was testing the temp sensor. It works and close the charging at the defined temperature. Doing this, the APP reports...

Nice work Torbjorn! I had the same problem with my app and it has frustrated me for a while?. Changing the language fom norwegian to english was all it took, thanks a lot! ?

I really want to use this charger for my LFP bank keeping lead acid for the starter battery to secure the alternator. But I don't want to charge the LFP batteries to more than 13.8 V and stop charging when they reach that level. I don't want any float charging for the LFP's. Can I do that with...

How big difference in cell voltage under normal operation is tolerable?

I have bought two of the active cell balancers and will try them when the pack is ready. I will try them but if I need more capasity may be the ones that HighTechLab use is better :). So, 30 mV difference between cells is OK? I only intend to do cutting off at 2,5V when I test the cells. In...

Thanks for the feedback. I intend to put 5 cells in paralell first and connect 4 such blocks i series. I have tested all cells and the difference I see is that some are "stiffer" on top - i.e. keeping the voltage high longer while some is better on the low side. They are quite similar regarding...

Hi form Norway. I have got hold of a bunch of blue CALB 100 Ah LiFePo4 cells from a condemmed car for a real low price (about 20$ a piece). I think the cells are more than 5 years old, but testing them I see that they still deliver about 90% capacity. The cells are somewhat different in...