visionary entrepreneur - innovation consultant and robotics specialist · Upvoted by , BE (Mech.) Mechanical Engineering and , PhD Combustion & Mechanical Engineering, Georgia Institute of Technology (2007) · Author has 738 answers and 6.1M answer views · 10y ·
To expand upon Nathan Kaemingk's answer and put some numbers to it from a vehicle perspective:
Consider the Tesla Model S, which has an available 85kWh battery and a 265 mile range.
Consider a similar gas-powered car, which gets 35 mpg.
Gasoline contains about 33kwh of energy per gallon.
The Tesla uses 320 Wh/mile of energy (85kWh/265 miles)
The gas powered car uses 940 Wh/mile of energy (33kWh/35 miles)
Once the energy is onboard (not counting the efficiency of the power generation, oil refining, or charging), the Tesla is using only about a third as much energy as the comparable gasoline-powered car.
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