Hello, I am a staff member of daly bms. According to your situation that the charging mos is not turned on, you can use the exclusion method to test. First make sure your collection cable and battery are soldered correctly, then test the voltage of each cable with a multimeter to troubleshoot the cable failure. If it is not a problem with the cable, because your bms is probably the hardware bms common port as far as I know, the way to activate the bms is to charge your load, make sure that the P-wire is connected to the negative pole of the load, and the B-wire is connected to the battery On the negative pole of the battery, and the black wire on the acquisition line also needs to be connected to the total negative pole of the battery, which can form a current loop to activate the bms. If the above methods can't be tested, I suggest you disassemble the bms and connect all the wires, and then use a multimeter to measure whether there is current flowing through the discharge mos. The last thing to remind is that your charger must be above 29.75v to fully activate bms and your ternary lithium battery. If u still have any question about bms,plz text me in the whatsapp :+86 13168984397 anytime ,i will try my best to solve ur problem!
