Sunpower Solar Panels
What solar panels are the most efficient?
Currently being sold today! I know SunPower corp. commercial panels are about 20%.
New rollable panels are becoming available that don't have to be permanently attached to a surface and that are more resistant to damage than conventional panels. Right now they are also even less efficient than photo cells at about 10%, but the cost factor may make up the difference.
Solar thermal is more efficient than photovoltaic cells. They focus sunlight with mirrors onto a pipe containing a liquid which is then heated to it's boiling point. That turns a turbine to produce power or is harnessed in some other way. The panels are cheap compared to photo cells, don't require perfect manufacture or exotic materials, no expensive maintenance and they are much easier to repair. I don't know of any available to individuals yet but there are at least two companies building generating plants in Nevada with this technology.
SunPower is about 22% efficient but even at that rate it will take decades to pay for itself and the panels are unlikely to last that long at anything near optimal efficiency. The cost is just too high at present but solar thermal may provide a good alternative until photovoltaic cells mature, if you can cobble together a system.
The final link is about a claimed 80% efficient solar cell that even generates some power at night. It's based on nano-technology, like many promising energy developments in batteries, electrolysis and ethanol production. If it works as advertised it should revolutionize solar tech. Eventually.
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SunPower Solar Panels VS Conventional Solar Panels - Nothing beats SunPower!
SunPower & Toshiba Sign 32-MW Supply Deal
SunPower Corp. has confirmed that under a strategic supply agreement, Toshiba Corporation will order 32 megawatts of solar panels from SunPower in 2010. The SunPower panels will form the cornerstone of Toshiba's new residential solar offering in Japan, to be launched on April 1.