What is Foldable Solar Panel? Just as the name suggests, this is a solar panel that uses solar cells to convert solar energy into electrical energy, and it can be folded. Why we make it folding? Everyone knows that most of the existing solar panels are coming with the fixed-planar structures, we usually install them out of doors or on the roof of the house. After installing the solar panels, they are basically fixed in position and cannot be disassembled, especially in the case of severe weather or relocating, the solar panels cannot be recycled in time, because it easily damages the solar panels and causes huge economic losses. So for the convenience of use, there are many foldable solar panels that are used in different applications on the market. 5 Volt solar panel is good for charging the device voltage less than 5v, such as smartphones, USB fans, flashlights, etc. 12 Volt solar panel is good for charging 6-9V devices, such as Lamps, LED Lights, etc. 18v solar panel is good for charging 12v lithium and lead-acid battery, such as laptops, tablets, etc. This solar panel (5 volt) is equipped with 3 USB ports for charging of multiple devices.