A vehicle configurable to tow a charging trailer having at least one electric outlet configured to charge a battery powered device includes a human-machine interface (HMI), a wireless transceiver, and a controller in communication with the wireless transceiver and the HMI, the controller programmed to, in response to the wireless transceiver receiving signals associated with at least one battery powered device in a connected charging trailer having a battery state of charge (SOC) below a corresponding threshold, signal the HMI to generate an associated output. Input from the HMI may enable or disable regenerative braking of the charging trailer to charge connected battery powered devices to control the associated effect of the charging of devices in the charging trailer on efficiency of the towing vehicle.