Funding Roundup: Investors Keep Betting on Solar

Solar startups continue to raise good money for technology development and market expansion. Water purification, thermal cooling and ethanol companies also receive cash.

Intersolar's first conference in North America last week stirred up a flurry of news about the solar-power industry, including funding announcements from Recurrent Energy and Wakonda Technologies.

Recurrent Energy, which builds and operates solar power systems in exchange for long-term power-purchase agreements, raised $75 million (see Recurrent Energy Grabs $75M). The company, based in San Francisco, in May announced a project to install and operate at least 5 megawatts worth of projects on top of city-owned buildings.

Wakonda Technologies raised $9.5 million for developing gallium-arsenide solar cells (see Wakonda, Nuventix Raise Millions). Gallium-arsenide panels are more effective at converting sunlight into electricity than other materials in use today, but their high cost has relegated them mainly to panels built for satellites.

Wakonda, based in Medford, Mass., claims its technology could make it cheaper to produce the cells.

Two public solar companies also are looking to raise more capital. Read on to find out more and for investment news from other greentech sectors.

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