Department of Energy

Energy Efficiency

You are here

Top 4 Energy Department Inventions Saving You Energy & Money at Home

Learn how the Energy Department is helping lay the foundation for more efficient homes by developing energy-saving technologies.

View Article
Energy-Saving Homes, Buildings, and Manufacturing

The Energy Department's efforts to develop and deploy energy efficient solutions for buildings and manufacturing supply lines means large-scale energy and cost savings for all Americans.

View More
How Much Do You Spend?

Ever wonder how much you spend on energy a year? We're breaking down the numbers for you.

View Article

Every year, much of the energy the U.S. consumes is wasted through transmission, heat loss and inefficient technology -- costing American families and businesses money, and leading to increased carbon pollution.

Energy efficiency is one of the easiest and most cost effective ways to combat climate change, clean the air we breathe, improve the competitiveness of our businesses and reduce energy costs for consumers. The Department of Energy is working with universities, businesses and the National Labs to develop new, energy-efficient technologies while boosting the efficiency of current technologies on the market. 

Featured Content

The History of the Light Bulb
From incandescent bulbs to fluorescents to LEDs, we're exploring the long history of the light bulb.
Learn More
The History of the Electric Car

Travel back in time with us as we explore the history of the electric vehicle.

Learn More
Photo Gallery: 3D Printing Brings Classic Shelby Cobra to Life

All-electric 50th-anniversary Shelby Cobra car was created using large-scale 3D-printer at Oak Ridge National Laboratory.

Learn More
How 3D Printers Work

As part of our How Energy Works series, learn everything you need to know about 3D printers, from how they work to the different types of systems...

Learn More
Video: SuperTruck Barreling Down the Road of Sustainability

Latest Energy 101 video shows how new technologies are making heavy duty trucks more fuel efficient and less expensive to operate.

Learn More
You Asked, We’re Answering Your Fuel Cell Questions

We're answering your questions about fuel cells.

Learn More

Energy Efficiency Programs

ARPA-E projects have the potential to radically improve U.S. economic security, national security, and environmental well-being.