29 Apr '13, 9am

They should spend money developing this:

It is a nice idea and a beautiful concept, but unfortunately it seems very hard to get it to work at that small size. Not even a huge improvement in technology would help much for powering most apparatus we plug into regular AC sockets. I estimate the solar panel has a radius of about 4cm, giving an area of 50 square centimeters, on which there’s less than 7W solar energy available to harvest (nominal value is 137 mW/cm2 according to NASA). The solar cell is really tiny and the effective area (perpendicular to the incoming sunlight) is even smaller. Currently the best commercial solar cells has an efficiency ratio of about 20%, leaving us less than 1.5 W if positioning the solar panel in the best way. A solar charged battery with a USB socket would be more believable and useful than a high power AC outlet, so don’t buy a portable tea kettle for this beautiful power gadget ...

Full article: http://www.yankodesign.com/2013/04/26/plug-it-on-the-wind...

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