For propulsion motors, which data point is concerned with the performance during energy recovery?

The data point concerned with the performance during energy recovery in propulsion motors is regeneration performance. This refers to how effectively a propulsion system can recapture energy, typically during braking or deceleration, and convert it back into electrical energy for storage or use. Regenerative systems are designed to harness kinetic energy that would otherwise be lost as heat, facilitating greater overall efficiency and performance of the electric propulsion system.

The focus on regeneration performance is crucial because it directly affects the sustainability and operational cost of electric propulsion systems, especially in marine applications. By optimizing this performance aspect, vessels can extend their range and reduce energy consumption, which is increasingly important in the push for greener technology.

The other options, while relevant to understanding motor performance, do not specifically address energy recovery. Efficiency ratings measure how well a motor converts input energy into mechanical energy, input power quantifies the energy supplied to the motor, and power loss identifies energy that is wasted, usually as heat. While these factors are all important in evaluating a propulsion motor's overall performance, they do not specifically pertain to the regenerative capability that is central to effective energy recovery.