##  [Round-Trip Efficiency](/round-trip-efficiency) 

  ##  [Round-Trip Efficiency](https://engineering.quantumdictionary.io/round-trip-efficiency-0) 

  

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**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

The ratio of usable energy recovered from an energy storage system to the energy input required to store it, measured over a complete charge–discharge cycle and typically expressed as a percentage; the metric accounts for losses during storage, conversion and ancillary parasitic loads when these are included in the energy accounting.