The New York Times visits Far Niente Winery, where 994 solar panels cover a pond:
"The company that installed the two arrays, SPG Solar of Novato, Calif., as well as Sunengy of Australia and Solaris Synergy of Israel, are among the companies trying to develop a market for solar panels on agricultural and mining ponds, hydroelectric reservoirs and canals. While it is a niche market, it is potentially a large one globally. The solar panel aqua farms have drawn interest from municipal water agencies, farmers and mining companies enticed by the prospect of finding a new use for - and new revenue from - their liquid assets, solar executives said."
SPG Solar calls their system "Floatovoltaics."