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I have created a solar oven with an old satellite dish and about 250 small mirrors. My thermometer reached >600 degrees F in about one minute. I'm trying to think of a way for it to automatically track the path of the sun. Any suggestions?

Scientists at the U.S. Department of Energy's National Renewable Energy Laboratory (NREL) have set a world record in solar cell efficiency...

Solar power, the holy grail of renewable energy, has always faced the problem of how to store the energy captured from the sun’s rays so that demand for electricity can be met at night or whenever the sun is not shining. The difficulty is that electricity is hard to store. Batteries are not up to efficiently storing energy on a large scale. A different approach being tried by the solar power industry could eliminate the problem. The idea is to capture the sun’s heat. Heat, unlike electric current, is something that industry knows how to store cost-effectively. For example, a...

Solar-power modules that concentrate the power of the sun are becoming more viable. A worker arranges wafers that will be fabricated into superefficient solar cells. These cells could help dramatically reduce the cost of generating electricity from solar energy. (Credit: The Boeing Company) Technologies collectively known as concentrating photovoltaics are starting to enjoy their day in the sun, thanks to advances in solar cells, which absorb light and convert it into electricity, and the mirror- or lens-based concentrator systems that focus light on them. The technology could soon make solar power as cheap as electricity from the grid. The idea...

Here is what the acolytes of solar power don't want you to know... These are the essentials you need in order to appreciate the absurdity of using solar cell power systems as any kind of sensible alternative. After you read this, ask yourself again how much sense solar power really makes. THIS IS WHAT HAPPENS TO THE SUN'S ENERGY WHEN WE USE SOLAR CELLS TO GENERATE ELECTRICITY:     SOURCE   LOSS - %     POWER - W/m2   1.     solar constant       --   1370W 2.   atmosphere       27   1000W...

For education and discussion only. Not for commercial use. Apathy, expensive equipment among hurdles Solar energy has become almost a throwback term from the energy crunch of almost three decades ago, when some environmental advocates felt homeowners could help end the country's reliance on imported oil and reduce pollution. Unattractive solar panels on rooftops popped up here and there, but generally the technology failed to catch on in any great numbers with homeowners. But some architecture students at the University of North Carolina-Charlotte proved recently that with the right technology, the sun can satisfy much of the power needs of...

Auroras may dazzle more people than usual this weekend as Earth receives a glancing blow from an enormous solar outburst that erupted on Jan. 19. The outburst, known as a coronal mass ejection (CME), was detected by sun-watching satellites. Researchers at the University of Alaska's Geophysical Institute predict that auroras should be visible from Seattle, Des Moines, Chicago, and Cleveland, to Boston and Halifax, Nova Scotia Saturday and Sunday nights, weather permitting. ... Space Weather Center forecasters say they expect the encounter to generate a weak geomagnetic disturbance beginning around 1 p.m. Eastern Standard Time Sunday Jan. 22 and lasting...

A new MIT study offers a way out of one of solar power's most vexing problems: the matter of efficiency, and the bare fact that much of the available sunlight in solar power schemes is wasted. The researchers appear to have found the key to perfect solar energy conversion efficiency—or at least something approaching it. It's a new material that can accept light from an very large number of angles and can withstand the very high temperatures needed for a maximally efficient scheme. Conventional solar cells, the silicon-based sheets used in most consumer-level applications, are far from perfect. Light from...