Surge Protection for Solar Power Systems: What You Need to Know
As solar installations become more common, the need for robust protection grows. Solar power systems are particularly vulnerable to overvoltages due to their outdoor exposure and long cable runs.
Why Solar Systems Need SPDs
- Lightning strikes on solar panels or nearby infrastructure can cause destructive surges.
- Switching surges in the utility grid can travel through inverters to damage electronics.
- DC-side overvoltage is also a serious concern, especially for high-voltage string inverters.
Key Areas to Install SPDs in PV Systems
- DC input side (between PV panels and inverter)
- AC output side (between inverter and grid connection)
- Communication and monitoring lines
Choosing the Right SPD for PV
Ensure the SPD is rated for photovoltaic applications (e.g., high DC voltage ratings, weatherproof enclosures). Look for compliance with standards like IEC 61643-31 for DC systems.
Conclusion
Protecting your solar investment with proper SPDs ensures long-term efficiency, safety, and uptime. Don’t overlook surge protection as a fundamental part of any photovoltaic system.
