The Solar Impulse team has been working on the project since 2003, with the carbon-fiber plane wingspan measuring 262-feet and weighing 4,409 pounds. Over at Dübendorf Airfield in Switzerland yesterday, pilot Markus Scherdel successfully flew it for the first time, flying 350 meters in 28 seconds, with an altitude of just a meter. Powering the four electric motors are 12,000 photovoltaic solar cells, though yesterday they were aided with on-board batteries.

Despite being worked on for close to seven years, it's still early days yet for the Impulse Solar, with the next big step in the quest to circumnavigate the world being a 36-hour flight in summer 2010. Make it so, Captain Piccard. [Wired]

And, like we said, there's no reason Californians would reject the deal between Solaren and PG&E—the utility company isn't investing or putting up any money at all, it's just saying "sure, we'll buy energy from you if and when this thing ever works." Which, you know, duh. The 15-year contract starts in 2016, by which time hopefully we won't have already devolved into a Mad Max-style post-apocalyptic desert state. [CPUC via CNET]

Only a concept now, but this charger-that's-also-a-iPhone-stand is easy enough that some Chinese company could quickly put out a solution in a few months. [Petit Invention via Into Mobile]

The building is made up of 14,000 equilateral triangles. Some are solar panels, some are windows, others just fill out the structure. The net result is a building that manages to mask the black behemoths you're used to seeing.

I love how the exterior influences the interior lighting, not to mention how great it all looks when lit up. [Inhabitat]

Frederik Krebs came up with this combination of solar panels and LED lights which, while definitely a work-in-progress, could bring cheap light to some of the world's poorest regions. I call the lamps a work-in-progress because despite being durable enough to last several years, they run at a mere 1% efficiency. But with the expected final cost of $7 a piece, they're full of life-changing potential, despite that low efficiency.

Some prototypes of the lamps are currently being tested in Zambia. As seen in the picture, the solar panels are left laying flat during the day and then rolled up (and secured with snap-button) into a cone-shaped lamp. I'm definitely looking forward to seeing the results of the prototype tests and a final product, because no one should go without artificially lit nights. [IEEE Spectrum via Pop Sci]

The Tokai Challenger completed the journey in 29 hours and 49 minutes despite a flat tire—that's an average speed of about 63mph. That's actually not the best time in history. That Dutch team we mentioned above achieved the current record back in 2005—29 hours and 11 minutes. But obviously conditions like sunlight and wind can skew these numbers on a year to year comparison basis. [Global Green Challenge via Wired via Engadget]

UPDATE: Reader Stephen gives us another reason for the recently slower times:
"A major reason why the Nuna team from 2005 holds the time record is because there were no speed limits in the Northern Territory of Australia before January 2007. Now the speed limit in the Northern Territory is 130km/h (81mph). In the race there are time penalties for breaking the speed limit. I know this because I was a member of the University of Waterloo's solar car team that raced in Australia in 2007."

My guess is that you will need all 3-feet of that space to generate enough electricity to play your music for 4.5 hours at full volume/12 hours at a normal volume. Of course, it takes 20 hours of outdoor sun exposure (or 40 hours indoor) to reach a full charge. If you are not patient enough to wait, the Reverb can be powered up via a regular electrical socket—although I would suggest spending your $2,229 elsewhere if you see yourself doing that frequently. Speaking of being patient, the Reverb won't be available in April of 2010. [Reverb via Gizmag via Inhabitat]

President Barack Obama announced today a $8-billion federal plant to modernize the United State's power grid. $3.4 billion will come from the government, and the rest will be put up by private companies. In his words:

At this moment, there's something big happening in America when it comes to creating a clean-energy economy. But getting there will take a few more days like this one, and more projects like this one. Here in this region of Florida, this project will reduce demand for electricity by up to 20 percent during the hottest summer days that stress the grid and power plants,. It will provide smart meters to 2.6 million more customers. And most importantly, it will create thousands of jobs - good jobs, by the way, that can't be outsourced; jobs that will last and jobs that pay a decent wage.

In my words: About fucking time. We need to modernize the power grid not only for the jobs, but for the long term survivability of the country's economy. It's the only way to depend less on other countries, and make production more efficient and competitive.

And it's not only about using renewable energies. It's about increasing the efficiency of electricity transport and consumption at homes. That's why $1 billion is going to smart meters and other consumer oriented technology, which will make more than 5 million homes to consume a lot less. Two billion dollars will go to infrastructure to support those meters, and $400 to modernize power lines, with an additional $25 million to push for smarter, more power efficient devices.

Do you think this is a lot of money? It is, especially since it only covers a small part of the grid. But here's what we are getting in return: $20 billion in savings during the next decade, plus increasing the reliability of the grid to avoid power outages that cost $150 billion a year to the US economy.

I can only hope this goes well, and we keep modernizing the rest of the grid as soon as possible. [Miami Herald and Ars Technica]

The ReNu probably doesn't work as you'd imagine from looking at the photograph. Sure, you see an iPod dock with speakers, just as you'd expect. But that huge back plate is actually a solar panel/battery combo that you can remove from the dock to hang near a window to store energy. It takes about 9 hours to charge in direct sunlight, or 20 hours to charge in indirect sunlight, to power music for 7-8 hours.

This ReNu panel actually supports a variety of different base units, including a pure iPod/iPhone dock (no speakers included) and an LED desk lamp.

I think the basic idea becomes something like, hang or place a bunch of solar panels in sunlight, then grab power as necessary. But in case you find this ease of use scenario as hard to believe as us, all of the docks and the ReNu panel itself will plug in should the sun's juice fall short.

The base ReNu panel alone can be preodered now for 2010 availability. It runs $200. The accessories start at $90 and work their way up. [Regen via Treehugger via DVICE]

The structure generates 130 kilowatts of solar power, enough to offset 145,000 lbs of greenhouse gas emissions annually. There are even charging terminals available for electric cars, but only two can be charged at a time. Seems like a pretty smart way to keep drivers comfortable and harvest some spare energy on the side. [Dvice]

How do they do it? With a triple junction compound solar cell that uses three photo absorption layers made from elements like indium and gallium. I'll leave it to the physical chemistry geniuses among you to explain exactly what that means in the comments.

You might have heard of efficiency ratings that climb into the 40% range. Sharp even lists one in their press release. To clarify, those are different tests. Apparently there's a distinction made in efficiency ratings between concentrated and unfocused light. The more you know, right?

Don't expect to be covering your house in these soon, they're meant for use in satellites. [Akihabara via Engadget]

The way you'd use the reNEW charger is simple. You toss your batteries in the top portion and they'll be ready at the bottom once they're fully-charged. Cool idea, but I'm not entirely sure that I'd want to plaster my windows with it.

Updated: Now we've got some official pictures from the original designer rather than the previous "work in progress" shots. [Yanko Design]

Energy efficiency is the ultimate goal of the Solar Decathlon, but the surPLUShome's good looks and functionality helped the German Team beat out the early favorites from California. Nearly all the available surface area of the surPlushome is covered in solar panels with a few stylish wood panels thrown in for good measure. Those and the windows are really the only things keeping the house from looking like an oversized 2001: A Space Odyssey prop.

Congrats to the winners! You can check out other entries from the competition at the link. [Inhabitat]

Student groups from around the world (and several from the States) competed to create a net zero-energy, 800-square-foot house powered exclusively by solar energy, and came up with some great ideas. The house pictured above was created by the team from Cornell University in upstate New York, using silos to reflect the bucolic look of that area. Other teams experimented with automatic shutoffs for TVs and lights or sophisticated purification of shower and rainwater. The winner will be announced this coming Friday, and you can check out the current standings here. [CNET]

Designed as a residential, hotel and entertainment facility, the Vertical Village is absolutely blanketed in solar panels. In fact, the building is expected to earn a LEED Gold certification when it is completed. That distinction is difficult enough for a homeowner to obtain, much less a gigantic commercial structure. Each building is oriented to reduce the heat from sun exposure—quite the contrary to a massive bed of solar collectors on the south side of the building that automatically adjusts to the sun's position for maximum efficiency. The village also features a solar roof that helps to transport energy and break the solar field up into more manageable segments.

It's not enough to have all of the really cool buildings on the planet—now they want a monopoly on the sun. Damn you Dubai. [Graftlab via Ecofriend via Inhabitat]

The shingle will use thin-film cells of copper indium gallium diselenide (CIGS), a photovoltaic material that typically is more efficient at turning sunlight into electricity than traditional polysilicon cells.

Dow is using CIGS cells that operate at higher than 10 percent efficiency, below the efficiencies for the top polysilicon cells — but would cost 10 to 15 percent less on a per watt basis.

As you can see, the panels look like standard asphalt shingles—and they can be installed without any specialized knowledge. In fact, they only take about 10 hours to install on average compared to the 22-30 hours for traditional panels. Since a basic roofer could handle the job in a short amount of time, installation costs should be more manageable. Plus, Dow claims that their Powerhouse will be 30% to 40% cheaper than other solar shingle designs.

This could finally be the innovation that gets homeowners on the solar bandwagon. It's still not cheap of course, but the energy savings, boost in home values and government incentive programs might make the upgrades worth it. [Reuters via Treehugger via DVICE]

If there's an argument to be made, it's one of durability. These vintage Nazi backpacks are rated to last another 50 years (apparently WW2 was meant to go on a long, long time). Retrofitted with solar panels and batteries before being rebranded as KILLA Vintage series #1 bags, I have a feeling that the electronics will fail long before the cloth will wear away.

And while admitting this feels a bit awkward, I'm smitten with the design of the pack itself. It's almost too bad that only 20 bags will be produced yearly for an unspecified price. [Killa via taktomyshirt via therawfeed]

So even on cloudy days and when placed outside of the sun's direct gaze, these panels can still draw low levels of current—too low for commercial release at this time, but something scientists are working on now.

Because of their unique design that requires less silicon, the colorful panels would cost less to produce that traditional solar tech...meaning that the stained glass industry could be due for a big boon. [GreenSun via Neatorama via DVICE]

As a teenager in a rural village in Nepal, Milan Karki knows just how desperately developing countries need an affordable, renewable energy source. But rather than whine about the availability of electricity or the cost of batteries, he sat down and came up with a solution: Low-cost solar panels with human hair conductors.

Solar energy isn't anything new, but solar panels themselves can be pricey to produce due to using silicon. Karki solved the cost issue by using human hair instead since it turns out that Melanin, a color pigment in hair, is a good conductor. Oh, and did we mention that it's cheaper than silicon?

Half a kilo of hair can be bought for only 16p in Nepal and lasts a few months, whereas a pack of batteries would cost 50p and last a few nights.

I don't know why they're selling hair by the kilo, but this idea is absolutely brilliant and I can't wait to see if it turns into something widely used. [Daily Mail]