The most common slewing drive application for the dual axis slewing drives is dual axis solar trackers. The dual axis tracking system is a kind of power unit that can keep the solar panel facing the sun at any time and make the solar light irradiate the solar panel vertically at any time. Dual axis slew ring drive can improve the tracking precision and power generation efficiency which means the dual axis slew drive are able to create an efficient and reliable solution in a single drive. The dual axis slew drives for CPV can be mounted horizontally, vertically, or on a combination of multiple axes.