If solar panels exhibit low power output, immediate actions must be taken to diagnose and resolve the issue efficiently. Verify the installation angle, 2. . Environmental factors cause 70% of solar production issues: Weather, shading, and dirt accumulation are the most common culprits behind reduced solar output, making regular monitoring and maintenance essential for optimal performance. In this guide, we'll break down the eight most common reasons for low solar power generation. You'll learn what each issue looks like in real life and what to do next to restore your system's. . The good news is that identifying and addressing the root cause can often resolve the issue and restore your solar panel's optimal performance. A 100W panel rated for 100W at 77°F will only produce 70-80W on a 95°F day, and that's normal. Inspect electrical connections, 4.