Understanding the Role of the NCU in GF Solar Tracking Systems

Do All Projects Need an NCU? Here Is the Clear Answer.

As GF expands into global markets, many customers often ask:
“Do I always need an NCU when using the GF Tracker Control Unit (TCU)?”

To help customers better understand our system architecture, this article explains the function of the NCU (Network control unit), when it is required, and when a project can operate with TCUs only.
 

What Is the NCU?

The Network control unit (NCU) is the central hub for communication and coordination within a Solar tracking system. It connects all TCUs in the field and integrates the power plant with monitoring platforms.

Core Functions of the NCU

• Centralized Monitoring
  Collects data from all TCUs and uploads it to the cloud or SCADA system.

• Unified Control
  Sends batch commands (stow, tracking mode switch, backtracking on/off) to ensure synchronized operation.

• Long-Distance Communication
  Supports Ethernet or 4G communication for remote data access and control.

• Data Management
  Organizes system information such as row angles, alarms, motor performance and environmental data.
  
  
   

Do All Projects Require an NCU?

Short Answer: No.

GF designs its system to be flexible. The NCU is not required for every project.
Some systems can run fully with TCU units only.
 

When TCU-Only Operation Is Suitable

Projects that do not need an NCU:

• Small installations (< 2–5 MW)

• Only a few tracker rows

• No need for cloud/remote monitoring

• Local on-site monitoring is sufficient

• Customer prefers simpler system architecture

In these cases, the TCU can operate independently:

• Local sun-tracking

• Backtracking

• Wind protection

• Row-level control

This keeps the cost lower while maintaining performance.
 

When an NCU Is Recommended or Required

Recommended for:

• Medium or large-scale projects (≥10 MW)

• Solar farms with many tracker rows

• SCADA or EMS system integration

• Projects requiring real-time remote monitoring

• Areas with frequent strong winds

• Customers who require centralized stow or batch control

Benefits of Using the NCU

• One-click stow across all tracker rows

• Real-time cloud data and alarms

• Lower O&M cost through remote diagnostics

• High-level integration with monitoring platforms

• Safer and more efficient site operation
   

How the System Works Together

System Architecture

• TCU handles local motor control, sensors, and angle calculation

• NCU manages communication, coordination, and data aggregation

Together, they provide precise local control + intelligent centralized management.
 

Project Suitability Comparison

Conclusion

The NCU is not mandatory for all projects.
GF provides a flexible architecture so customers can choose the most cost-effective and technically appropriate solution for their solar plant.

If you are unsure which configuration is best for your project, our engineering team is ready to assist.

For more information, please contact:
info@gfnewenergy.com