Can a Flexible Solar Panel Beat a Rigid One?
100W Rigid Solar Panel: https://amzn.to/4oUNJwx
130W Flexible Solar Panel: https://amzn.to/3JyiOpE (price increased)
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In this video I put a flexible 100-watt solar panel head-to-head against a rigid 100-watt panel to see which one really performs better on an RV roof. Most people choose flexible panels because they’re easy to install — you just glue them down without drilling holes or mounting brackets. But do they actually make as much power as a rigid panel, and how long do they last?
To keep things fair, I ran multiple tests. First, I compared both panels flat on a simulated RV roof. After one hour, the rigid panel produced 61 Wh, while the flexible panel only managed 48.4 Wh — almost 21% less. Then I tested them freestanding with airflow underneath, where the rigid panel reached 69.5 Wh and the flexible panel came in at 58.6 Wh, still about 16% lower. I also measured panel temperatures and explained why heat is such a big problem for flexible panels.
The results make it clear: rigid panels stay cooler, they perform better, and they last much longer before degrading. Flexible panels, on the other hand, tend to run hot and usually only last a few years before the plastic surface turns milky and blocks light. That said, they can still be useful. If you want a quick, lightweight installation without mounting brackets, or if you want a portable panel you can set in the sun while your RV stays cool in the shade, flexible panels can be a good option.