I’m building my e sk8board and i do have some troubles. and i think about buying a BMS but i don’t know, what a BMS is for, why a BMS can be bad or where to buy good ones?
There are numerous threads on BMS’s. Use the search function and spend some time reading the threads.
Good luck with your build Cheers
essentially they make all the different battery packs “look” like one big battery, keeps everything nice and balanced for easy charging and easy/safe discharging when you’re motoring around