A solar tracking sensor and methods of tracking the sun. In one embodiment, the solar tracking sensor includes a housing, an inclinometer to output a signal indicative of the angle of the housing relative to the gravitational pull of the Earth, and first and second photosensors located on a first plane located within the housing. An opening on one side of the housing allows solar radiation to pass through the housing and reach the first and second photosensors. A difference calculating module is coupled to the first photosensor and the second photosensor. The difference calculating module determines a photosensor difference value using signals from the photosensors and outputs a photosensor difference value. The photosensor difference value can be used by a controller. The controller is coupled to the inclinometer determines whether the opening is aligned with the Sun based on the photosensor difference value and information or signal from the inclinometer.