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{{Short description|Driving range of a vehicle using only power from its electric battery pack}}
{{more citations needed|date=January 2012}}
'''All-electric range''' ('''AER''') is the maximum driving range of an [[electric vehicle]] using only power from its [[electric vehicle battery|on-board battery pack]] to traverse a given [[driving cycle]]. In the case of a [[Battery electric vehicle]] (BEV), it means the maximum range per [[battery charger|recharge]], typically between 150 and 400 miles.<ref name=":0">{{Cite web |title=Alternative Fuels Data Center: Electric Vehicles |url=https://afdc.energy.gov/vehicles/electric.html |access-date=2023-05-01 |website=afdc.energy.gov}}</ref> For a [[plug-in hybrid electric vehicle]] (PHEV), it means the maximum range in [[charge-depleting]] mode, typically between 20 and 40 miles.<ref name=":0" /> PHEVs can travel considerably further in [[charge-sustaining]] mode which utilizes both [[fuel]] combustion and the on-board battery pack like a conventional [[hybrid electric vehicle]] (HEV).
Calculating AER is made more complicated in PHEVs because of variations in [[hybrid vehicle drivetrain|drivetrain]] design.  A vehicle like the [[Fisker Karma]] that uses a serial hybrid design has a clear AER.  Similarly a vehicle like the [[Chevy Volt|Chevrolet Volt]] which has a parallel design disengages the [[internal combustion engine]] (ICE) from the drivetrain while in electric mode<ref name=":1">{{Cite web |title=Alternative Fuels Data Center: Plug-In Hybrid Electric Vehicles |url=https://afdc.energy.gov/vehicles/electric_basics_phev.html |access-date=2023-05-07 |website=afdc.energy.gov}}</ref> and has a clear AER. However blend-mode PHEVs which use the ICE and [[electric motor]] in series do not have a clear AER because they use both gasoline and electricity at the same time. This motor design uses only the battery to power the drivetrain and uses the internal combustion engine to generate electricity for the battery.<ref name=":1" /> ''Equivalent AER'' is the AER of vehicles following this architecture.  One example of this calculation can be found in Argonne National Labs report titled "TEST PROCEDURES AND BENCHMARKING Blended-Type and EV-Capable Plug-In Hybrid Electric Vehicles."<ref name=trans>{{Cite web |url=http://www.transportation.anl.gov/pdfs/HV/457.pdf |title=Archived copy |access-date=2011-12-31 |archive-date=2014-08-24 |archive-url=https://web.archive.org/web/20140824075345/http://www.transportation.anl.gov/pdfs/HV/457.pdf |url-status=dead }}</ref><ref>[https://supergreensolutions.com/products/ev-charging/ EV Charging Products], 24 January 2023</ref>
This procedure uses the formula below to calculate an equivalent AER for vehicles that operate in blended mode:
:<math>\text{AER}_\text{Equivalent} = \left (1-\frac{GPM_{CD} }{GPM_{CS} }\right ) d^{CD}</math>
Where GPM<sub>CD</sub> designates efficiency in charge-depleting mode, and GPM<sub>CS</sub> charge-sustaining mode as designated and ''d''<sup>CD</sup> is distance in charge depleting mode.
A [[plug-in hybrid]]'s all-electric range is designated by PHEV-''(miles)'' or PHEV-''(kilometers)'' km representing the distance the vehicle can travel on battery power alone. For example, a PHEV-20 can travel 20&nbsp;miles without using its internal combustion engine, or about 32&nbsp;kilometers, so it may also be designated as PHEV32km.
The all-electric range for BEVs has steadily increased in the last decade. In model year 2010 BEVs, the average AER is 127&nbsp;km (78.9&nbsp;mi), while in model year 2021 BEVs the average AER is 349&nbsp;km (216.9&nbsp;mi).<ref name=":2">{{Cite web |title=Evolution of average range of electric vehicles by powertrain, 2010-2021 – Charts – Data & Statistics |url=https://www.iea.org/data-and-statistics/charts/evolution-of-average-range-of-electric-vehicles-by-powertrain-2010-2021 |access-date=2023-05-07 |website=IEA |language=en-GB}}</ref> In model year 2021 BEVs, the median driving range was 60% of the median range of internal combustion engine (ICE) cars, a gap which will continue to narrow as more long-range BEVs are produced.<ref>{{Cite web |title=FOTW #1221, January 17, 2022: Model Year 2021 All-Electric Vehicles Had a Median Driving Range about 60% That of Gasoline Powered Vehicles |url=https://www.energy.gov/eere/vehicles/articles/fotw-1221-january-17-2022-model-year-2021-all-electric-vehicles-had-median |access-date=2023-05-07 |website=Energy.gov |language=en}}</ref>
The All-electric range has also increased for PHEVs over the past decade, increasing from an average PHEV range of 33&nbsp;km (20.5&nbsp;mi) in model year 2012 to 62&nbsp;km (38.5&nbsp;mi) in model year 2021.<ref name=":2" />
== See also==
* [[Worldwide Harmonised Light Vehicles Test Procedure]] (WLTP)
* [[United States Environmental Protection Agency]] (EPA)
* [[New European Driving Cycle]] (NEDC)
== References ==
{{reflist}}
[[Category:Electric vehicles]]