Question 1

How is EV efficiency measured?

Accepted Answer

EVs use miles per kWh or Wh/mile. 4 mi/kWh is excellent, 3 mi/kWh is average. MPGe (miles per gallon equivalent) compares to gas cars using 33.7 kWh = 1 gallon of gas energy.

Question 2

What affects EV efficiency?

Accepted Answer

Temperature (cold reduces 20-40%), speed (highway uses more), HVAC use, driving style, terrain, and tire pressure. Regenerative braking recovers 10-25% of energy in city driving.

Question 3

Why does the US use MPG while others use L/100km?

Accepted Answer

MPG (higher = better) is intuitive for comparing. L/100km (lower = better) better shows fuel savings - halving consumption halves L/100km but doesn't double MPG.

Question 4

How does speed affect fuel economy?

Accepted Answer

Most vehicles are most efficient at 45-65 mph. Above 65 mph, every 5 mph increase is like paying an extra $0.20-0.30 per gallon.

Electronvolts Efficiency Converter

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