In solar power generation systems, one of the keys to maximizing sunlight utilization is precise tracking. Whether in single-axis or dual-axis solar tracking systems, the servo motor plays the role of “fine adjustment,” ensuring that photovoltaic panels are aligned with the sun as accurately as possible to maximize irradiance. This article explores the advantages of GXServo from the perspective of precision control.
1. Solar Movement and the Need for Tracking
The sun moves from east to west during the day and changes altitude throughout the year. Therefore, an efficient solar tracking system must be capable of both daily dynamic adjustment and seasonal tilt correction. The higher the precision of the system, the more sunlight it captures and the more energy it produces. For instance, in dual-axis tracking systems, an angular deviation of more than 5 degrees can lead to a 8–12% loss in annual energy yield.
2. High-Precision Drive Technology in GXServo
As a high-performance digital servo brand, GXServo excels in precise control. Its internal high-resolution magnetic encoders, combined with closed-loop PID control, allow angular deviation to be controlled within ±0.1 degrees. Unlike conventional analog servos that often exhibit jitter and slow response, GXServo offers fast, stable, and precise adjustments.
For example, in single-axis systems, GXServo can perform fine-tuned adjustments every 10 minutes to ensure continual solar alignment. This persistent accuracy is critical for maximizing solar capture, especially during dawn and dusk when sun angles change rapidly.
3. Dynamic Response and System Coordination
GXServo features a high-torque direct-drive structure with excellent start-stop control. In fluctuating weather—such as shifting cloud cover or gusty winds—the control system can provide real-time feedback to the servo for micro-adjustments, preventing cumulative errors.
Additionally, GXServo supports RS485 bus communication and CAN protocol, allowing multiple servos to synchronize in group control setups. This is especially important for large solar arrays where consistent panel alignment is essential to avoid partial shading and uneven performance.
4. Mechanical Design and Ease of Maintenance
GXServo employs metal gear sets and aluminum alloy housings, delivering both powerful torque output and high mechanical rigidity. It can withstand long-term wind loads and reverse torque without loosening. An optional brake mechanism allows the servo to maintain position even when power is lost—ideal for harsh environments.
Furthermore, GXServo’s modular design—separating control board, motor, encoder, and casing—makes it easy to service. This lowers maintenance costs, especially in remote installations such as solar farms in deserts.
5. Economic Gains from Precision Control
At a 5MW solar farm in Western China, replacing legacy analog servos with GXServo led to a 9.6% increase in average daily power output, with particularly significant gains during early morning and late afternoon. The annual yield increased by about 175,000 kWh. At an electricity rate of ¥0.5/kWh, this translates to a yearly revenue boost of around ¥90,000. The cost of upgrading to GXServo paid off within a year and generated pure profit thereafter.
Conclusion
Precision control defines the “soul” of solar tracking systems. With its digital, intelligent, and high-precision capabilities, GXServo is the ideal actuator for accurate solar tracking. For solar companies seeking peak energy efficiency, GXServo is not just a servo—it’s a high-return investment.
