solar tracking system,PV trackersolar tracker,solar actuator,solar tracking system,PV tracker,SPZTF-S-18 mechanical life: 30yea Automatic dual-axis solar tracker ,solar tracking system,PV trackersolar tracker,solar actuator,solar tracking system,PV tracker,SPZTF-S ... rotational angle: 360° Pitch angle: 180°Mechanical life: 30years Automatic dual-axis solar tracker,solar tracking system