@Will Prowse , would be GREAT if you made a detailed BMS hook up Video, and explain the ins/outs of BMS's.
At the present time, i am purchasing 20 105AH lifepo4 [ps thats your fault, why?, your videos inspire me ,LOL] I am replacing 5 of 12vdc Lead Acid 20AH batteries in the ebike, in series making it a 60vDC Ebike..presently, cut of the metal, and am making it ready to hold 20 lifepo4's in series [oy vey i am scared to blow things up,at 57y old, I dont have a lot of cat lives left] , I am looking at getting a 100a daly BMS, and am scared to hook it up, not sure what they mean by "please do not insert ballance wires into BMS before connecting batteries,must make sure connecting with batteries is correct" ....ahh ok, sure..huh? engrish please.
From memory, Ive seen Will say this and do this in all the DIY battery videos (ie there must be 10 or more on his channel?).
ie. Build the battery and then plug in the balance leads to the BMS *LAST*. Also pulling the balance leads off will (should) shut down the BMS. Apart from doing balancing, those leads give the BMS the cell data that it needs to have to protect each cell.