Tracking-integrated Concentrator Photovoltaics (CPV) represents an alternative to conventional CPV. The elimination of expensive and heavy solar trackers contributes to reduce the cost of conventional CPV, and open new market segments. This technology, still under development, needs further investigation. In this work, two tracking-integrated focusing systems with two different concentration levels, consisting of a fixed bi-convex aspheric lens and a movable triple-junction solar cell, are analysed. Initially, by means of detailed optical modelling, the concentrator elements are optimized. After that, they are experimentally investigated at Concentration Standard Test Conditions (CSTC) by varying the angle of incidence ± 50°. The results show an optical efficiency > 80% and > 60% for a geometric concentration of 10.0x and 82.5x, respectively, within the whole angular range. These systems could contribute to novel CPV applications such as agrivoltaics or building integrated.