Energy consumption is one of the most important factors of an all-electric car. As the energy stored in the battery is a precious and highly limited on-board resource, it should be used efficiently to maximize the range.
The list reveals that, depending on model, the combined energy consumption might be from 239 Wh/mile (149 Wh/km) to 496 Wh/mile (308 Wh/km).
* The results were converted from EPA's MPGe (Miles Per Gallon equivalent, assuming 1 gallon of gasoline=33.7 kWh) to Wh per mile of EPA range - Combined, City and Highway. Some data estimated. Some versions of models receive the same ratings despite being slightly different.
** All numbers include charging losses (typically several percent).
*** Additional version with Wh/km chart can be found on the bottom
The most efficient cars, with the lowest energy consumption (combined) are:
- Tesla Model 3 Standard Range Plus - 249 Wh/mile (149 Wh/km)
- Hyundai IONIQ Electric - 253 Wh/mile (157 Wh/km)
As of the 2020 model year, the Model 3 is the best in all categories (Combined, City and Highway). Previously, the top model was the Hyundai IONIQ Electric. Its 2019 version is still the top in City category: city: 225 Wh/mile (140 Wh/km).
The chart below reveals a specific ailment of new European BEVs - they are electron guzzlers according to EPA energy consumption ratings. The Jaguar I-PACE, Audi e-tron and most recently also the Porsche Taycan, are all far behind the Tesla Model X. In the case of Porsche, it's really high: 488 Wh/mile (304 Wh/km).
We will try to observe other ratings/comparisons to verify whether EPA ratings will reflect the real difference in energy consumption/range between the models.
All-Electric Car Energy Consumption (EPA) - April 11, 2020
All-Electric Car Energy Consumption (EPA) - April 11, 2020 (Wh/km version)
* some data estimated