The accuracy of electric energy measurement at charging stations is the cornerstone for ensuring fair transactions in electric vehicle charging and is a key factor in the healthy development of the electric vehicle industry. Consequently

the periodic verification of electric energy measurement errors at charging stations holds significant importance. This paper begins with analyzing the mechanisms behind the generation of electric energy measurement errors in charging stations

followed by summarizing the existing techniques for the verification and assessment of electric energy measurement errors

and then discussing the strengths

weaknesses

and future directions of current methods. It is pointed out that due to the intrinsic drawbacks of high cost and low efficiency associated with on-site verification and remote verification based on physical standards

these techniques are challenging to meet the demand for regular verification of electric energy measurement errors in large-scale charging stations. Therefore

the data-driven large-scale assessment methods has become inevitable. In this direction

assessment methods based on the principle of energy conservation and the inter-station measurement comparison principle are expected to become a practical pre-assessment methods for the electric energy measurement performance of charging stations

aiding in the comprehensive regular verification of the ever-increasing number of charging stations.