A decade ago, no one wanted to finance solar installations, but times are changing. Slowly First Solar (NASDAQ:FSLR) and SunPower (NASDAQ:SPWR) started selling bonds backed by large solar projects, and equity investors saw the attractiveness of leasing projects from SolarCity (NASDAQ:SCTY) and others. 

This year, there was a huge advance when SolarCity sold a debt offering secured by future lease payments, a major milestone for the industry. Crowdfunding also emerged as a new financing method in 2013, which could open up the financing side to small investors. 

So, what doesn't the future hold? Erin Miller sat down with solar analyst Travis Hoium to see what the future of solar financing might look like. 

Erin Miller has no position in any stocks mentioned. Fool contributor Travis Hoium manages an account that owns shares of SunPower and personally owns shares and has the following options: long January 2015 $5 calls on SunPower, long January 2015 $7 calls on SunPower, long January 2015 $15 calls on SunPower, long January 2015 $25 calls on SunPower, and long January 2015 $40 calls on SunPower. The Motley Fool recommends SolarCity. The Motley Fool owns shares of SolarCity. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.