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Solar Cars: The Oldest Energy Around

Aug 26, 2008
With zero emissions, solar cars present a sunny solution to eco-friendly car buyers. It also makes good sense to develop a green car technology that doesn't call for a complicated infrastructure or any type of fueling station. What could be easier than using an already existing energy source like the Sun, right? After all it was around since the beginning of the solar system, well before fossil fuel. If it were only that simple, we'd probably already have done it. In spite of universities and corporations building solar cars every year for the past 20 years for the annual Australian World Solar Challenge solar car race, we're not quite there yet.

How do they work?

A solar car is really an electric vehicle powered by solar energy. Photovoltaic (PV) cells in the form of solar panels convert sunlight into electrical energy. The process generates heat, which is converted into electrical energy and stored in an on-board battery. The battery serves the same basic purpose as a gas tank on an internal combustion car. 

In spite of the great bounty of sunshine there for the taking, solar car technology is elusive. The solar electric power source needs a lot of PV cells, which are expensive, and the efficiency level of PVs is estimated to be only 10% to 15%. These are daunting challenges facing engineers, and it's more likely a hybrid solar with another fuel source is the only viable option in the near future, yet the concept is intriguing enough for engineers inside and outside universities to take a pure solar car prototype into a more advanced development stage.

Are there any solar cars out there?

French manufacturer Venturi says their solar electric AstroLab hybrid concept car yields an improved PV cell efficiency level of 21%. It's not exactly a family car with its 2-seat tandem cockpit configuration, but it's one possibility. The Hungarian manufacturer Antro has designed a solar gas-electric hybrid other wise known as a tribrid scheduled for production in 2012, and Tesla Motors has an electric car that can be recharged with solar power with 2009 models available in the U.S. and Europe. These are only the first advances in solar car technology. As time goes on more and more manufacturers will be developing and incorporating some type of solar technology into preexisting propulsion systems. This will create a new sort of hybrid, disconnected from fossil fuels, yet still not fully reliant on the Sun's energy

Perhaps with the recent high intensity photvoltaic cells designed by a company in Israel, many of the energy efficiency problems will be taken care of. It is not clear though if they can be designed for cars.

Conclusion

Solar energy and more specifically solar cars would be an amazing advancement in future car technology. They would allow for free travel and nearly unlimited accessibility. Time will tell if all the problems associated with harnessing the world's oldest energy source can be dealt with. If the hurdles can be passed then for sure solar cars will be the wave of the future.
About the Author
Andrew Beckers writes about information helpful to humanity. Learn more about Solar Cars
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