A method of operating a transport refrigeration system comprising: controlling, a first plurality of components of a refrigeration unit, wherein controlling comprises operating a prime mover and an electric generation device; and operating, the prime mover at a selected high speed; monitoring, a plurality of operating parameters of the refrigeration unit, wherein at least one of the operating parameters is at least one of a voltage of the electric generation device and a speed of the prime mover; comparing, the voltage of the electric generation device to a selected voltage; comparing, the speed of the prime mover to a selected speed; and characterized by: taking a corrective action when the voltage of the electric generation device exceeds a voltage limit for a first selected time period, wherein the corrective action comprises: operating the prime mover at a selected low speed and the controller initiating a continuous voltage control cycle mode, and wherein the continuous voltage control cycle comprises: operating the prime mover at an increasing rate of speed until the voltage of the electric generation device equals the selected voltage, and exiting the continuous voltage control cycle when the speed of the prime mover equals the selected high speed and the voltage of the electric generation device equals the selected voltage. controlling, a first plurality of components of a refrigeration unit, wherein controlling comprises operating a prime mover and an electric generation device; and operating, the prime mover at a selected high speed; monitoring, a plurality of operating parameters of the refrigeration unit, wherein at least one of the operating parameters is at least one of a voltage of the electric generation device and a speed of the prime mover; comparing, the voltage of the electric generation device to a selected voltage; comparing, the speed of the prime mover to a selected speed; and characterized by: taking a corrective action when the voltage of the electric generation device exceeds a voltage limit for a first selected time period, wherein the corrective action comprises: operating the prime mover at a selected low speed and the controller initiating a continuous voltage control cycle mode, and wherein the continuous voltage control cycle comprises: operating the prime mover at an increasing rate of speed until the voltage of the electric generation device equals the selected voltage, and exiting the continuous voltage control cycle when the speed of the prime mover equals the selected high speed and the voltage of the electric generation device equals the selected voltage. taking a corrective action when the voltage of the electric generation device exceeds a voltage limit for a first selected time period, wherein the corrective action comprises: operating the prime mover at a selected low speed and the controller initiating a continuous voltage control cycle mode, and wherein the continuous voltage control cycle comprises: operating the prime mover at an increasing rate of speed until the voltage of the electric generation device equals the selected voltage, and exiting the continuous voltage control cycle when the speed of the prime mover equals the selected high speed and the voltage of the electric generation device equals the selected voltage.