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A clean-tech start-up that thinks it has solved a problem that has vexed engineers for decades–how to effectively store energy generated by wind and sunshine–has gained some heavyweight financial backers.

Danielle Fong and her co-founders are attempting to solve a problem that has long bedeviled engineers.

An investment group that includes Bill Gates‘ Cascade Investment and Thiel Capital, a firm run by Peter Thiel, the co-founder of PayPal and the first outside investor in Facebook Inc. FB +0.94%, has poured $37.3 million into LightSail Energy, a three-year-old start-up dreamed up by a Princeton graduate school dropout. The investment was led by Thiel Capital and Founders Fund.

Danielle Fong, now 25, said it took LightSail about a year to raise the Series D funding because investors are more wary of clean technology since solar power company Solyndra spectacularly failed in 2011. Solyndra burned through nearly $1 billion from private investors and more than $500 million in Department of Energy loans before declaring bankruptcy.

To read the full, original article click on this link: Peter Thiel, Bill Gates, Khosla Get Behind Energy Storage Start-Up LightSail in $37M Deal - Venture Capital Dispatch - WSJ