http://seekingalpha.com/article/228563-wal-mart-s-bet-on-thin-film-solar?source=dashboard_stocks-sectors

excerpt:

Save Money. Live Better.

Companies like Wal-Mart (WMT), for example, which in 2005 set a goal to get 100% of its power from renewable resources. A few weeks ago Walmart announced it would begin installing two different types of thin film solar on its stores: cadmium telluride and copper indium gallium selenide (CIGS).

The company likes the technology because:

• it can be installed on flat roofs, even in snow-prone areas

• it's more efficient in fog and smog-prone locations

• it can actually be incorporated into the building

• it can provide 20%-30% of each store's electricity needs

The project will be one of the largest business installations of thin film solar, will help Wal-Mart save money and reach its sustainability goals, and will help to quickly commercialize this still-young technology.