WinAfrique designs and builds hybrid wind and diesel turbine systems for powering cell phone base stations. Safaricom contracted Winafrique Technologies in Nairobi to design and supply pilot wind/diesel hybrid systems at three very remote base stations. The systems consisted of a Bergey 7.5 kW turbine on a 24 m (80 ft) SSV tower, sealed batteries, and an inverter. These sites were installed and monitored for one year. The results showed excellent reliability and diesel fuel savings of 70-95%. Based on these positive results, Safaricom has contracted for six more sites, and has many other wind/diesel sites in the planning stage