What is All-Electric Range (AER)?


The All-Electric Range, abbreviated as AER, is a critical parameter in the world of electric cars (EVs). It represents the furthest distance an EV can travel solely on the energy stored in its onboard battery, without the assistance of any other energy source or mode of power.

For a Battery Electric Vehicle (BEV), all-electric range (AER) refers to the maximum range on a single charge, which is typically between 150 and 400 miles. For a Plug-In Hybrid Electric Vehicle (PHEV), the AER indicates the maximum range in charge depletion mode, usually around 20 miles. However, diverse drivetrain configurations, especially in PHEVs, can complicate the precise calculation and interpretation of AER.

When an EV operates entirely on its charged batteries, it aims to minimize energy consumption. This mode and the All-Electric Range (AER) metric are crucial in assessing an electric vehicle’s efficiency and feasibility in real-world scenarios. The method by which the AER is determined can differ based on the specific designs of hybrid electric vehicles, highlighting the electric-only miles achievable for a particular vehicle configuration and class. In practice, the Utility Factors (UF) of PHEV models can vary significantly, owing primarily to their AER.

What is an Equivalent All-Electric Range?

The Equivalent All-Electric Range (EAER) denotes the portion of the entire charge-depleting distance attributed to the electrical energy used by the battery during a charge-depleting test.

Recommended: What are EREVs (Extended-Range Electric Vehicles)?

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