Soladigm, which develops energy-efficient glass for buildings, adds $10m to the $30m raised in December after being identified by New York-listed industrial conglomerate General Electric's clean-tech open innovation competition.

Fisker Automotive, which plans to build luxury hybrid electric and fossil fuel cars in the US, is reportedly raised $150m in capital privately, according to a document seen by newswire Bloomberg.

The company sold 7.15 million common shares at its initial public offering (IPO) at $15 each, according to Gevo's regulatory filing.

Neil Gardyne, principal at New Africa Mining Fund, said: "By NAMF II's second closing on 31 January 2012, we hope to have a total commitment of up $300m."

Japan-based manufacturers Asahi Kasei and Asahi Glass and Envia's existing venture capital firms, Bay Partners, Redpoint Ventures and Panagea Ventures provided $10m to Envia Systems, with GM Ventures another $7m.

Venture capital firm Kleiner Perkins Caufield & Byers and Google Ventures reportedly invest in Clean Power Finance.

Clean-tech dominates corporate venturing investment amounts rather than deal numbers as overall volumes and values start to rise again.

Industrial conglomerate General Electric (GE), energy utility NRG Energy and oil major ConocoPhillips have provided undisclosed-sized tranches of the $300m to launch Energy Technology Ventures.