America’s Electrical Grid Is an Incredible Feat of Engineering—And Its Biggest Bottleneck

Three straight weeks of 110-degree temperatures in Phoenix. Deep freeze in Texas. A sweltering heat wave across nearly a third of the country. America’s power grid is under unprecedented strain from extreme weather caused by climate change—and it desperately needs modernizing. 

But it’s not so simple. The electric grid is a mosaic of incredible feats of engineering—an elaborate web weaving together power from nuclear reactors, massive hydroelectric dams, and even solar farms into a network capable of powering our homes and charging our cars instantly and reliably.

And it’s easy to take for granted. When we first discovered how to use electricity, it was an open question as to how replenishing electric power should happen. One option, about which I previously wrote, involved the use of battery men who would deliver weekly supplies of electric power like milkmen once did with milk. There were even visions of giant acid battery tanks buried beneath homes that could be replenished like septic tanks. 

Instead, the system that eventually won out was Thomas Edison’s. The most efficient system was one that could generate electric power as needed and transmit it instantly—no delivery men required. 

It would take decades to be built out fully, but as it grew to encompass more and more of the  North American continent, the model of distributing electric power from plant to home transformed society and our economy. Yet for all the transformations the electric grid wrought, it is now time for the grid itself to transform if it is going to keep pace with the rapidly changing nature of power generation and electricity usage. 

Such transformation, however, poses an unprecedented challenge. The flip side of the grid’s impressive complexity is the difficulty of altering any part of it. And although the electric grid is the very system powering the U.S. economy, it is also becoming the country’s greatest bottleneck in increasing the abundance of energy.

Let’s explore the current state of the electrical grid, how it works, and its history, and its future.

The electrical grid today