Bigger guns like Goldman Sachs and General Electric 's GE Energy Financial Services have done some renewable energy financing as well, primarily of wind farms.

FORBES: Magazine Article

While Adam's father Peter Lanza, a tax director and vice president for GE Energy Financial Services, was outgoing, Nancy could be "unsociable, " Mary Ann Lanza said.

WSJ: Suspect, Mother Come Into Focus

Peter Lanza is tax director and vice president of taxes for GE Energy Financial Services in the New York City area, according to his resume posted on the website LinkedIn.

CNN: STORY HIGHLIGHTS

That's partly due to the development of the capital markets over the past decade in places like India and Latin America, making it easier for a company to make long-term investments in those areas, says Colleen Harkness, a managing director with GE's Energy Financial Services unit.

FORBES: GE's Energy Bet

's (nyse: GE - news - people ) Energy Financial Services arm, also provide some financing for solar projects.

FORBES: Paying For Panels