Tracking greatly improves the performance of your PV system. It lets the PV panels follow the course of the sun, so that the panel surface is always in an optimal angle to the sun rays. This realizes highest efficiency. As the study shows, can increase the amount of power generation by 40-50%: Spec. Actuator Type Rod type Stroke length 36" 24" 18" Optimal stroke 33"-34" 20"-22" 14"-16.5" Static Load 12,000 N Load capacity 4,500 N Dynamic load 8,000 N Speed(Non-load) 3.2mm/sec. Resolution 1.89 pulse/mm Input Voltage 36VDC Load current ≤1.0A Duty cycle 20% Features Adjustable stroke Reed sensor Acme screw Self-locking Water & dust resistant Enhanced antirust quality High performance & service life High precision Heavy duty bracket and static load capacity Option Stroke length:18"/ 24"/ 36" (inch) Voltage:24 /36 VDC Sensor type:Reed Drive screw:Acme Rating Operating temperature:from -30 to 40oC Packaging Packing spec. 130*18.5*12(cm) Weight 11 kgs