Energy Efficiency

Energy Efficiency news, analysis, research, how-to, opinion, and video.

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Apple store solar

Solar panels being installed

Feds want to add 75K new solar power workers

The U.S. Department of Energy plans to increase its previous goal of training solar power workers, including veterans, by 50%.

Ivanpah Solar Power plant

California leads nation in solar installations as world sees 14% increase

California became the first state this year to receive 5% of its power from utility solar, and while that number may seem small, it's likely an early indicator of growth elsewhere in the U.S.

nasa solar power satellite concept

China considering space-based solar power station

Chinese scientists say a solar power station in a geosynchronous orbit could supply a constant stream of electricity, avoiding the intermittent issues that come with nighttime back on Earth.


Researchers say low-cost, longer-life graphene light bulb coming this year

Researchers in the U.K. have created a lightbulb using graphene, a material that's 200 times stronger than steel and a million times thinner than human hair.

SolarCity rooftop panels

SolarCity to build its own power grids

SolarCity, a solar panel installer, is offering to set up mini-power grids that include battery backup, which can be deployed by corporate campuses, military bases and even cities.

sun star solar

Solar in California's urban areas could provide 5 times the power the state needs

The Golden State's commercial rooftops and other urban areas present plenty of opportunity for power generation through small- and utility-scale solar installations, according to a study in the journal Nature.

Samsung may beat Apple to cutting-edge car technology

Study of patents suggests Apple won't be the first tech firm to release a cutting-edge car

rooftop solar installation

New solar installs beat wind and coal two years in a row

Solar accounted for 32% of the new electical generating capacity in the U.S. in 2014, beating out both wind and coal for the second year in a row, according to a new report.

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Within 15 Years, Solar Will Be a Dominant Energy Source

Declining solar panel costs, and improving financing and customer acquisition costs, are expected to help solar energy generate $5 trillion in revenue by 2030, a 10-fold increase over today.

cw largest solar

The World's Biggest Solar Energy Projects

More than a dozen solar energy projects -- each of which will generate more than 100 megawatts of energy -- are either being built or have been completed.

block island wind farm

First U.S. Offshore Wind Farm Moves Ahead with $290M in Financing

The Providence-based developer of Deepwater Wind, what will likely be the country's first offshore wind farm, has closed on more than $290 million in financing for a five-turbine demo of the renewable power source.

Toyota Mirai

Toyota Begins Production of its First Hydrogen Fuel Cell Car

Toyota this week held a ceremony marking the beginning it its production of the Mirai, which will begin selling later this year at a base price of $57,500.

rooftop photovoltaic array

How Regulators and Legislators Make it Harder for You to Use Solar Power

While solar power is leading other sources for new electrical capacity, the distributed power movement, where homeowners and businesses deploy photovoltaic panels on site, is under assault by utilities and fossil fuel interests.

Apple's solar plant in Maiden, N.C.

Apple’s $850M Solar Plant Rockets it to First Place Among U.S. Corporations

Apple, which has been deploying solar power for years, this week announced another $850M investment, giving it capacity that will push it past Walmart as the largest corporate user of solar energy.

georgia tech aquatic center solar panels

Renewable Energy Costs Expected to Drop 40% in Next Few Years

New data released from the International Renewable Energy Agency shows the price of solar-generated power will reach price parity or become less expensive than electricity generated by traditional methods in many countries.

Photovoltaic panels

U.S. to Impose Big Tariffs on China and Taiwan for Dumping Solar Panels on Market

The International Trade Commission has voted to uphold findings that the two countries intentionally saturated the market with cheap photovoltaic cells, undercutting competition and driving prices down.

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Solar Industry Jobs are Growing at 20 Times the National Rate

In 2014, 31,000 new jobs were created in the solar industry, which accounts for nearly two percent of all new jobs created in the U.S. last year.

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Investment in Renewable Energy Soars for First Time in Three Years

Driven largely by oil price weakness, investments in renewable energy rocketed up 175% in 2014 compared to 2013; this year looks to be bright as well.

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