Air Industrial Wind Generator, Wind Turbine is capable of resisting the harsh environments that generally accompany mountaintop telecommunication sites, environmental monitoring sites and off-shore oil platforms. It has specially formulated blade material that can stand up to sub-zero temperatures, and its blades are spaced farther from the tower so that it can operate at sustained winds up to 130 miles per hour. Maintenance free performance, easy installation and high power output make the Air Industrial ideal for any remote battery charging application. The Air Industrial does not have an internal controller, so an external controller must be installed on the battery bank. The recommended external controllers are Morningstar TriStar TS-45 or TS-60, or a Xantrex C40. Set inverter in "diversion load" configuration and add an air- or water-heating diversion load. Comes with a three year manufacturers warranty.