Flexible Foldable Solar Panel 5V 18V High Efficience Solar Battery 21W Solar Pho

Solar Panel Peak Power: 21W. Simple and Advanced. Solar Power: 21W sunpower solar panel. Solar Panel Peak Power: 21W. High Efficiency: 21W SUNPOWER solar cell is made from US, up to 23%-25% efficiency,while most panels in the market are 15% efficiency.

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