SunPower touting full-scale solar cell prototype at 23.4% efficiency

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Improving efficiency is important--but spurring actual sales is innovative financing. To wit: Much of SunPower's growth is being fueled by Power Purchase Agreements. That said, the company often executes PPA's directly with customers with the expectation that it can later assign the agreement to an outside financier. SunPower, however, doesn?t disclose its total exposure to unsecured financing or the value of sales guarantees, called system put-rights, whereby SunPower could be required to buy back customers? systems. industry.bnet.com/energy/2008/06/13/creative-financing-powers-sales-and-risks-at-sunpower