Soladigm, a tinted window maker formerly known as Echromics, has added a further $10m to its series C round that initially closed at $30m in December.
The company has added venture capital firms Westly Group and Navitas Capital to its consortium.
Soladigm, which develops energy-efficient glass for buildings, raised $30m in December after being identified by New York-listed industrial conglomerate General Electric’s clean-tech open innovation competition with GE’s Energy Financial Services division investing in the C round.
DBL Investors, a venture capital (VC) firm created from the spin-out of the Bay Area Equity Fund I from investment bank JP Morgan in January 2008, and Switzerland-based peer NanoDimension, which focuses technology manipulation at the atomic scale, co-led the C round.
VC peers Khosla Ventures and Sigma Partners reinvested while Cynthia Ringo, a partner at DBL has stepped on to Soladigm’s board to join Khosla’s Pierre Lamond (who replaced Samir Kaul as the VC’s representative) and Sigma’s Fahri Diner.
Sigma and Khosla had backed Soladigm’s $21m previous round last year.
Soladigm plans to use some of the round for its first factory, which will cost about $130m and start shipping windows in the first quarter of next year.