Quick Answer
Degraded solar panels exhibit reduced efficiency, lower power output, and increased temperature, which can be identified through visual inspection, monitoring system data, and professional testing.
Visual Inspection
When inspecting solar panels, look for signs of physical damage, such as broken or missing glass, cracked or buckled frames, and loose connections. Check for dirt, dust, and debris accumulation on the panels, which can reduce efficiency. Use a flashlight to inspect the panels for any signs of water damage, such as dark spots or corrosion.
Monitoring System Data
Check your monitoring system for any irregularities in power output, such as sudden drops or inconsistent readings. Look for alerts or warnings from the system about panel performance or temperature anomalies. Compare the data to historical performance to identify any trends or patterns.
Professional Testing
Have a professional assess the panels’ performance and efficiency through a process called an “IR scan” or “thermal imaging.” This involves using specialized equipment to measure the temperature of each panel and identify any hotspots or areas of high resistance. A professional can also perform a “performance test” to measure the actual power output of the panels compared to their rated capacity.
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