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For now, I only charge with the boat's outboard motor and shore power, later I may connect solar power.

Each cell without bms to capasitytester? "Brand new grade A" like aliexpress says ?

I'm most interested in the float voltage, the LFP doesn't need it, so isn't that 13.4 the most optimal in this case?

Do you mean solar charge controller? it only starts charging when the input voltage is 5v higher than the battery voltage, it doesn't seem to work. I can't find links.

My BMS does not count cycles, other alarms are also not saved, only active ones appear in the list. Same thing with Xiaoxiang and overkillsolar app. Is there anything I can do?

Has anyone updated the JBD bms firmware? i have 4 different jbd versions. 80A SP04S028 manufactured in 2022 -everything works great! 200A SP04S034 manufactured in 2021 -everything works great! 150A SP04S034 manufactured in 2020 -everything else works great but doesn't count battery...

Connections are ok. The cells are well balanced, the difference between 2-10mV when discharging the battery and 2-3mV at rest, the problem is only when charging. Could it be because I made top balance 3.6v, but now I charge them 14.2 V (3.55 V each)?

Do you mean ALT->DCDC->LTO ? I thought the charger only works in one direction. What about starting current peak, can dcdc handle that?

Hi, I am planning to install the next configuration. Boat Outboard (18A charge) -> 35Ah 6s LTO-Battery to start -> 9A DC-DC Charger - > 160Ah 4s Lifepo4 Battery. LTO only works for startup, LFP for electronics. The question is, what happens when both batteries are full? DC-DC protects the...

Thanks for the answer. Yes I charged back up with the bms and then the switch in parallel to load the top balance. it is likely that they have lower capasity because they are Liitokala cells, however i thought it would be more than 55ah what i tested. I didn't think the current would be...

My mistake, sorry. If I try to fit the springs, is an 80x20x2.5mm = 5.2kg/cm spring enough? I calculated it myself and got something like the car's spring class, I don't think it's right ?

Is it possible to calculate how tight the nuts are tightened with a torque wrench (nm) that gets a pressure of 300kgf? I have 4pcs 174x150mm cells, so the size of the pressure plates is 204x150x15mm (pvc) and four m6 rods. Does tightening have to be done when the cells are full or empty? I...

Or if I forget the dc-dc charging and put a fet isolator, what happens when there are two lithiums of different chemistry, which one gets charged first?

Externally all similar re-wrapped, the weight I have not checked. One cell already had traces of heat in the plus-pole, the plastic of the negative terminal is also different in color than the others (pic). The cells were 3.29v when they came to me. After the parallel connection they were well...

Any experience with these manufacturers? I have not heard before, I was offered the following: BAK 145AH, 57 usd/pc Greatpower 135ah, 46usd/pc All brand new

Answering myself, I can put 2x12v in series in a 24v system. The signal voltage of almost all mosfets in Ali's product range is min. 3v, but the bms only gives 2.9v, can someone recommend what I should use as a relay?