Fonrich AFCI Rapid Shutdown Solutions: Highway Photovoltaic Systems and Safety Innovation

Guided by global “dual carbon” goals, the energy transition is rapidly transforming the transportation sector. Among the most promising innovations is the “photovoltaic + highway” model, turning underused spaces—such as service area rooftops, toll stations, embankments, and tunnel medians—into productive energy corridors. However, the complexity of these highway photovoltaic systems introduces significant challenges that demand advanced safety solutions.

Key Challenges in Highway Photovoltaic Projects

• DC High-Voltage Fire Hazards: Over 50% of solar fires result from DC arcs. Highway environments increase this risk due to potential vehicle collisions that may damage components and expose live wiring.
• Delayed Emergency Response: Without rapid shutdown solar capabilities, first responders face electrocution risks, slowing down fire control and increasing potential losses.
• Fault Detection Difficulties: Solar strings spanning kilometers make manual fault identification time-consuming and expensive, raising O&M costs and reducing energy yield.

To overcome these issues, Fonrich New Energy, a leading solar energy company, introduces dual-layer safety protection: Module-level safety protectors and string-level arc protection solutions.

Fonrich Module-level Safety Protector: Comprehensive Module Protection

Designed specifically for highway photovoltaic installations, the Module-level safety protector delivers robust protection through three key functions:

1. Module-Level Rapid Shutdown: Instant Safety Control

With remote or manual activation, the rapid shutdown PV device instantly cuts off each solar module, reducing system voltage to a safe level. This critical feature enhances fire safety and protects emergency personnel.

2. Module-Level AFCI: Precision Arc Detection

Real-time monitoring detects series, parallel, and ground faults. The module-level AFCI (Arc Fault Circuit Interrupter) system immediately isolates compromised modules, preventing fire propagation.

3. Smart Monitoring for Efficient O&M

By collecting real-time data on voltage, current, temperature, and power output, the system enables precise fault localization. This intelligent approach minimizes downtime and supports cost-effective solar install management.

Fonrich String-Level Arc Protection: Reliable Coverage for Complex Scenarios

For retrofitting older systems or enhancing safety in challenging environments, Fonrich’s string-level arc protection offers a scalable solution:

1. Wide-Area Monitoring and Fault Localization

Continuously monitors series and parallel arcs across solar strings, accurately identifying faults caused by long-term vibration, sand erosion, or wiring issues.

2. Cost-Effective Retrofitting

No major electrical overhaul is required. Simply installing protectors at the string ends ensures arc protection, cutting costs and shortening project timelines.

3. Minimal Power Generation Loss

In case of a fault, only the affected string is shut down, while others continue to operate normally. This selective shutdown maximizes energy yield and plant profitability.

Conclusion: Safety as the Foundation of Solar Growth

Fonrich New Energy is committed to ensuring every solar install is safe, efficient, and sustainable. Through our rapid shutdown solar technology and module-level AFCI (Arc Fault Circuit Interrupter) systems, we are transforming highways into secure, high-performance green energy corridors—delivering clean electricity safely and reliably.