13s BMS for 12s battery, experts please!

i hope this thread is still alive: i also use a 12s battery (actually 2x 6s) on a 13s bms and after reading this thread i will just leave the 13th pin unconnected.

Now i need a 50,4 V charger: do i need to buy a smart charger or will the bms do the charging management?

BMS will not manage charge, you need a 50.4V lithium charger. And not the super cheap ones that look like this:

Those are crap. Just get a YZPower one from AliExpress

What bms do you have? On some you have to bridge some balance pins to make it 12s