Cleantech America, a privately held, two-year-old San Francisco company plans to build the world’s largest, solar power farm near Fresno, California, Reuters reports.

The 80-megawatt farm is to occupy as much as 640 acres and, upon completion in 2011, will be 17 times the size of the largest U.S. solar farm, about seven times the size of the world’s biggest plant, and double the largest planned farm – both in Germany.

Cleantech plans to sell the solar-generated power – enough for almost 21,000 homes – to the Kings River Conservation District.