In the United States, converting the full car and light-truck fleet to electric would call for about 1.32 trillion kWh of additional electricity each year. Depending on how you model it, estimates range from roughly 800 billion to 1.9 trillion kWh, raising total power demand by about 20% to a little over 30%.
Those figures assume nearly 298 million vehicles traveling around 3.3 trillion miles a year. Even so, electrification would replace roughly 4,800 billion kWh of gasoline energy with a system that uses energy far more efficiently.
That’s the core of it. EVs turn about 77% to 95% of electricity into motion, while combustion engines typically convert only about 12% to 40%. So electricity use would go up, but overall energy waste would drop.
The tougher issue, if you look closely at EV adoption, isn’t just producing the power. It’s getting that power to the places where people need it, when they need it. Utilities still have work to do on transformers, substations, transmission lines, and local distribution upgrades. Smart charging, overnight charging, battery storage, and eventually vehicle-to-grid systems could help flatten demand peaks. Federal policy is already leaning that way too, with the Bipartisan Infrastructure Law putting more than $20 billion into grid modernization.
And the U.S. isn’t headed for an overnight shock here. This looks more like a drawn-out transition. EVs accounted for just 6.4% of new light-vehicle sales in one recent quarter, and all electrified vehicles together were still only nearly 25%. Charging access is also uneven, especially for renters, lower-income drivers, people living in multi-family housing, and fleet operators.
Author: Chema Carvajal Sarabia
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