The performance or the yield strongly depends on the irradiation angle of the sun, which, in the ideal case, is always 90°. Corresponding tracking systems, so-called solar trackers, during the day therefore automatically align a plant towards the position of the sun. We distinguish between one- or two-axis designs: Whereas with the one-axis tracking system, the module field either only follows the setting angle of the sun in horizontal direction, or the solar orbit in vertical direction, two-axis systems can do both and thus produce the maximum energy yield. In the linear and swivel drives, mainly compact, low-maintenance RINGFEDER® metal bellows and elastomer couplings of the GWB and GWE series are used, ensuring backlash-free torque transmission and therefore a hysteresis-free alignment of photovoltaics systems of various sizes and types.