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America’s electrical grid was born more than a century ago, when our electricity needs were simple -- and our demand for power was much lower. As American homes and businesses take on ever-increasing numbers of electronic devices and technological capabilities, utilities need ways to learn about (and respond to) changing electricity demand in real time. The Smart Grid makes this possible, resulting in more reliable electricity for all grid users.

The Energy Department is investing in strategic partnerships to accelerate investments in grid modernization. We support groundbreaking research on synchrophasors, advanced grid modeling and energy storage -- all key to a reliable, resilient electricity grid that’s ready to power the generations ahead.

Quiz: Test Your Grid IQ
How much do you know about the electric grid? Test your knowledge with our grid IQ quiz!
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INFOGRAPHIC: Understanding the Grid

Our new infographic shows how electricity is generated, transmitted and distributed for use in our homes.

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What is the Smart Grid?

Learn more about modernizing our grid for the 21st century at

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How Can You Save?

Want to know more? Check out Energy Saver for in depth information.

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