There is no better way to get people to make big purchases than to offer a product with no money down. That is exactly what SolarCity (NASDAQ:SCTY) is planning to do. The company just announced that it will be extending its no-money-down offer to homebuilders and developers. It should come as so surprise that SolarCity is extending this deal, which was previously only available to homeowners, because the company recently signed a financing deal with Goldman Sachs (NYSE:GS) for this very kind of move,

So how does a company that sells solar power make money if customers don't pay for panels? It's all in the contract. SolarCity has a unique business model that separates it from many of the other solar industry plays that are out there today. In this video, Fool.com contributors Tyler Crowe and Aimee Duffy discuss how this unique business model gives it a leg up over several of its competitors, and how SolarCity could be poised to do well in the future.