Thanks for the succinct explanation!madin88 wrote: ↑Feb 14 2019 5:43am... on BMS with common charge and discharge port, the discharge current has to flow through two banks of Mosfet's, whereas on BMS with separte ports for controller (P-) and charger (C-), the discharge current just has to flow through one bank. This means they can reduce the number of Mosfet's on the bank for the charge port which would explain the lower price.
pros: usually identical max allowed charge and discharge currents, protection against overcharge from regen (or charge via controller)
cons: more heat at given discharge current
pros: less heat a given discharge current
cons: usually lower max allowed charge current, no protection against overcharge from regen