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While most portable solar panels are not ideal for fixed use, they are perfect for individuals who are always on the move. They can also be used to charge small electronics such as smartphones and lights. Most foldable solar panel have a lifespan of around 25 years. But like all electronic products, it will experience natural wear and tear over time and the solar panel's overall efficiency and power output may also decrease. How Do Portable Solar Panels Work? Portable solar panels are made from photovoltaic cells and these cells absorb sunlight and then turn them into electricity. The portable panels are connected to each other and ultimately to a battery, which stores the energy from the sun.