Israel’s Ecoppia has installed its robotic solar panel cleaning system on 5 more solar farms in Israel’s south. The system is now cleaning 5 million solar panels each month, that generate 35MW of energy. Desert dust can reduce solar panel efficiency by 40 percent.

http://www.ecoppia.com/ecoppia%E2%80%99s-water-free-solar-panel-cleaning-robots-installed-additional-35-mw-solar-projects