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Solar Ground Mount

Dual Axis Solar Tracker Systems - Duo Series

This product is a dual-axis tracking system that allows photovoltaic modules to be more effectively aligned with the sun's position in space through angle adjustments in both horizontal and vertical directions. Compared to fixed brackets or single-axis tracking systems, the dual-axis design can achieve higher solar energy reception potential in different seasons and at different times. The system adopts a modular unit layout, with each tracking unit independently driven and equipped with remote monitoring capabilities, making it suitable for ground-mounted power plant scenarios with high requirements for power generation enhancement.

Product Description

This dual-axis tracking system consists of columns, a rotary reducer, a space frame structure, and a control system. Each tracking unit can be configured with no more than 40 components (the number of components can be customized according to the project). The horizontal tracking range is ±120°, and the pitch range is 0° to 60°, covering the main range of changes in solar azimuth and altitude angles throughout the day.

 

The drive method uses closed-loop time control + GPS signal assistance. The MCU controller automatically adjusts the motor action based on the location's latitude and longitude, real-time time, and data from an optional anemometer. The system supports reverse tracking, which can reduce the impact of inter-array shading during early morning and evening hours. For communication, wireless or wired interfaces are provided, facilitating centralized monitoring of the operating angle, fault status, and other information of each support unit by the maintenance platform. The system includes an automatic reset function for nighttime and high wind conditions, helping to reduce wind load and mechanical wear during long-term standby.

 

 

Product Components

 

Advantage

Strong Adaptability:

The system is adaptable to varying terrain slopes, utilizing independent foundations and adjustable connectors to accommodate site undulations, making it largely unrestricted by terrain (except for large gullies or steep slopes).

 

High Stability:

The herringbone columns and multi-point supported grid structure form a grid distribution, effectively dispersing external loads such as wind and snow. The structural materials are made of commonly used building steel, and the surface anti-corrosion coating provides long-term corrosion resistance under normal atmospheric conditions.

 

Good Accessibility:

Each tracking unit is independently arranged, with sufficient spacing between adjacent units to minimize mutual obstruction and facilitate passage for construction vehicles, inspection personnel, and maintenance equipment.

 

Safe and Reliable:

The system features a one-to-one independent control design. The status of each support unit (real-time angle, fault codes, motor current, etc.) can be remotely viewed through the system platform, helping to detect anomalies early and reducing long-term power generation losses due to single-point failures.

 

Intelligent Tracking:

The system can automatically track based on GPS timing and solar position algorithms. With access to local real-time weather information (cloud cover, irradiance), the tracking strategy can be adjusted in cloudy weather to maximize the use of diffuse radiation. The reverse tracking function can further optimize the array layout during morning and evening hours.

 

 

Tracker Structure

 

Tracking Technology Dual Axis Tracker
System Voltage 1000V/1500V
Tracking Range Azimuth +120°, Elevation 0-60°
Working Wind Speed 18 m/s (Customizable)
Max. Wind Speed 35 m/s (Customizable)
Modules per Tracker ≤40 Modules (Customizable)
Principal Materials Hot-Dip Galvanized Q235B/Q355B, Zn-Al-Mg Coated Steel
Mean Coating Thickness ≥65μm
Drive System Slewing Drive
Foundation type PHC/Cast-in-Place Pile/Steel Pile

 

 

Control System

 

Control System MCU
Tracking Mode Closed Loop Time Control+ GPS
Tracking Accuracy <2°
Communication Wireless (ZigBee, LoRa); Wired (RS485)
Powder Acquisition External Supply/StringSupply/Self-Powered
Auto Stow at Night Yes
Auto Stow During High Winds Yes
Optimized Backtracking Yes
Protection Degree IP65
Working Temperature -30°C~65°C
Anemometer Yes
Power Consumption 0.5kWh per day

 

 

Applicable Scenarios

▪ In regions with high direct sunlight ratios (such as mid-to-low latitude, arid and cloudless areas), the gain potential of dual-axis tracking is relatively more significant.

 

▪ Ground-mounted power plants with high requirements for increasing average annual power generation and controllable land costs.

 

▪ Areas with some undulations but no drastic elevation changes, requiring independent foundations.

 

▪ Medium-to-large-sized power plants requiring remote operation and maintenance and centralized monitoring, especially in unmanned or minimally staffed scenarios.

 

▪ Projects with certain accessibility requirements, such as those involving complementary agriculture or fisheries (requiring a reasonable increase in the clearance at the base of the support structure).

 

 

Important Notes:

Civil Engineering Requirements:

The pouring location, elevation, and embedded part accuracy of the independent foundation directly affect the movement trajectory and structural lifespan of the tracking mechanism. Site surveys and foundation design should be conducted before construction.

 

Wind Speed ​​Risk:

The maximum operating wind speed is 18 m/s. Exceeding this speed should prompt immediate switching to high wind reset mode and cessation of tracking. In areas with frequent strong winds or typhoons, it is recommended to increase the wind resistance design level or add physical limit devices.

 

Power Supply Reliability:

Each system consumes approximately 0.5 kWh per day. Tracking function will fail during power outages. In case of occasional power outages at the power station, it is recommended to configure a small-capacity backup power supply or prioritize power supply to the control circuit.

 

Communication Reliability:

Wireless solutions (ZigBee/LoRa) require consideration of signal obstruction and repeater deployment in large-scale power stations; wired RS485 solutions have slightly higher cabling costs but stronger anti-interference capabilities, and can be selected based on project scale and environment.

 

Factors Affecting Tracking Accuracy:

An accuracy of <2° is a typical value under conditions of good calibration, no sensor drift, and no loose mechanical connections. In actual operation, accuracy may decrease due to factors such as foundation settlement, wind vibration, and motor hysteresis, requiring regular calibration.

 

Maintenance Recommendations:

It is recommended to check the lubricating oil condition of the rotary reducer and the tightness of fasteners every six months, and clean dust from the sensor surface; perform zero-point calibration of the angle annually.

 

Absolute Performance Not Guaranteed:

The dual-axis tracking system does not guarantee superior performance compared to a fixed support system under all weather conditions (such as continuous cloudy days, sandstorms, or snowy weather). Actual power generation gain is affected by factors such as project location, climate patterns, and system reliability.

 

 

Summary

This product is a dual-axis tracking support system. Through dual-axis movement in the horizontal direction (±120°) and the pitch direction (0~60°), it drives the photovoltaic modules to more accurately follow the sun's position. The system adopts a modular independent control design, combined with a herringbone column and a grid structure, adaptable to various terrains and maintaining good overall stability. Each system is equipped with an MCU controller, GPS, and an optional anemometer, supporting closed-loop time-controlled tracking, reverse tracking, and automatic reset in strong winds/at night. Remote status monitoring is achieved through wired or wireless communication. The structural materials are mainly hot-dip galvanized or magnesium-aluminum-zinc coated steel. The maximum operating wind speed is 18m/s, with a wind resistance design of 35m/s. The daily self-consumption of a single unit is approximately 0.5kWh. Overall, it is suitable for large and medium-sized ground-mounted photovoltaic power plants with high power generation requirements and relatively complex site conditions.

 

 

Solar First Project Reference

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Related Knowledge Points

 




 

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