125W Solar Panel Power Generation Test!

The weather today is absolutely perfect! ☀️

I immediately ran a power generation test on my 125W solar panel.

With such great weather, it smoothly delivered performance close to its rated capacity. But halfway through, I suddenly wondered,

"How much does the output drop when a shadow falls on the panel?" so I decided to do a quick experiment!Normal Conditions: Taking full advantage of the clear skies, it charged at a solid 125W!

With a Small Hand Shadow: Just blocking a tiny part dropped the output instantly to 85W...!

With an Arm Shadow: Increasing the shadow area even further caused the output to plunge to just 23W–25W...!

It was a great test that reminded me how drastically solar panel output drops due to the characteristics of series circuits, even when just a portion is shaded.

To maximize charging efficiency for a portable power station, securing a spot with "100% direct sunlight"—avoiding even tiny shadows from utility poles, trees, or yourself—is super important!

Keep an eye out for surrounding shadows when setting up your panels! ✨