TRAILER BRAKE GAIN BASED ON REGENERATIVE BRAKE CAPACITY

A dynamic braking system for an electrified vehicle having a high voltage (HV) battery system and an electric propulsion system includes a regenerative braking system configured to recharge the HV battery system, a vehicle controller configured to monitor and control the regenerative braking system to selectively perform a regenerative braking operation, and a vehicle brake actuator configured to selectively actuate one or more vehicle friction brakes. A brake controller is in signal communication with the vehicle brake actuator and configured for signal communication with a trailer brake actuator to selectively actuate trailer friction brakes. The brake controller is programmed to receive a driver braking request, receive a signal indicating a regenerative braking capacity of the electric propulsion system, and based on the driver braking request and the regenerative braking capacity, automatically adjust a trailer brake gain to (i) maximize energy recovery via regenerative braking and (ii) reduce brake wear.