How MPGe Works For Electric Cars

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How MPGe works for electric cars.

When you read that a new electric car gets, say, 115 MPGe, it's easy to understand why you might be confused. After all, electricity doesn't come in gallons, and if it's so efficient, why wouldn't the car go further? Some may disregard it entirely. But it's not that tough to understand and, when you do, you'll know why it's important.

MPG, in that regard, is a good metric. It tells you how much energy, measured in gallons of gas, you'll consume over a given distance. MPGe is the same, except instead of a gallon of gas it uses the electric energy equivalent, 33.7 kWh of energy, as its yardstick. So each time a car uses 33.7 kWh of energy, it is burning through theThat number, then, is exactly what it claims to be. Given the same energy as a gallon of gas, a car that gets 115 MPGe will travel 115 miles.

Gasoline remains a remarkably dense way to store energy. A Toyota Camry, with a 15.8-gallon tank, can store an unbelievable 532.5 kWh of energy onboard in the form of gasoline. That's more than twice as much as the Hummer EV gets with its gargantuan 212.7-kWh pack, which weighs and costs far more than any gas tank.

 

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