A power management system comprising: a first power conversion system configured to convert power from AC to DC or from DC to AC, wherein the first power conversion system is coupled to a first energy source in the shape of a first energy storage device, and a second power conversion system configured to convert power from AC to DC or from DC to AC, wherein the second power conversion system is coupled to a second energy source in the shape of a second energy storage device, wherein the first power conversion system and the second power conversion system are at their AC-side coupled in parallel to a common output (154, 165, 214), wherein the first power conversion system is configured to provide a compensatory reactive power flow for a period of time during which the second power conversion system transitions from a standby mode to an active mode; and a controller (140, 206) configured to cause the first power conversion system to cease provision of the compensatory reactive power flow to the common output (154, 165, 214) once the period of time elapses, wherein the first power conversion system and the second power conversion system are configured to provide power to the common output (154, 165, 214) in the active mode, and the controller (140, 206) is further configured to: issue an activate command to cause, while the first power conversion system is operating in the active mode and the second power conversion system is operating in the standby mode, the second power conversion system to exit the standby mode, the second power conversion system providing a reactive power flow to the common output (154, 165, 214) upon exiting the standby mode; and issue a reactive-power command to cause the first power conversion system to provide the compensatory reactive power flow to the common output (154, 165, 214) for the period of time to compensate for at least a portion of the reactive power flow to the common output (154, 165, 214) from the second power conversion system, wherein the second power conversion system comprises power electronic switching and a line filter, the line filter bypassed in the standby mode such that the power electronic switching is directly electrically connected to the common output (154, 165, 214), and causing the second power conversion system to exit the standby mode comprises configuring the second power conversion system to electrically expose the line filter to the common output (154, 165, 214). a first power conversion system configured to convert power from AC to DC or from DC to AC, wherein the first power conversion system is coupled to a first energy source in the shape of a first energy storage device, and a second power conversion system configured to convert power from AC to DC or from DC to AC, wherein the second power conversion system is coupled to a second energy source in the shape of a second energy storage device, wherein the first power conversion system and the second power conversion system are at their AC-side coupled in parallel to a common output (154, 165, 214), wherein the first power conversion system is configured to provide a compensatory reactive power flow for a period of time during which the second power conversion system transitions from a standby mode to an active mode; and a controller (140, 206) configured to cause the first power conversion system to cease provision of the compensatory reactive power flow to the common output (154, 165, 214) once the period of time elapses, wherein the first power conversion system and the second power conversion system are configured to provide power to the common output (154, 165, 214) in the active mode, and the controller (140, 206) is further configured to: issue an activate command to cause, while the first power conversion system is operating in the active mode and the second power conversion system is operating in the standby mode, the second power conversion system to exit the standby mode, the second power conversion system providing a reactive power flow to the common output (154, 165, 214) upon exiting the standby mode; and issue a reactive-power command to cause the first power conversion system to provide the compensatory reactive power flow to the common output (154, 165, 214) for the period of time to compensate for at least a portion of the reactive power flow to the common output (154, 165, 214) from the second power conversion system, issue an activate command to cause, while the first power conversion system is operating in the active mode and the second power conversion system is operating in the standby mode, the second power conversion system to exit the standby mode, the second power conversion system providing a reactive power flow to the common output (154, 165, 214) upon exiting the standby mode; and issue a reactive-power command to cause the first power conversion system to provide the compensatory reactive power flow to the common output (154, 165, 214) for the period of time to compensate for at least a portion of the reactive power flow to the common output (154, 165, 214) from the second power conversion system, wherein the second power conversion system comprises power electronic switching and a line filter, the line filter bypassed in the standby mode such that the power electronic switching is directly electrically connected to the common output (154, 165, 214), and causing the second power conversion system to exit the standby mode comprises configuring the second power conversion system to electrically expose the line filter to the common output (154, 165, 214).