100W RV folding solar panell Introduction： A solar cell, also known as "solar chip" or "photovoltaic cell", is an optoelectronic semiconductor sheet that uses sunlight to generate electricity directly. Single solar cells cannot be used directly as a power source. As a power source, several single solar cells must be connected in series, connected in parallel and tightly packaged into components. A solar panel (also called a solar cell module) is an assembly of multiple solar cells assembled, which is the core part of the solar power generation system and the most important part of the solar power generation system.     Solar Advantages：   (1) Universal: The sun shines on the earth, and there are no geographical restrictions. No matter whether it is land or sea, no matter whether it is mountains or islands, it is everywhere. It can be directly developed and utilized, and it is easy to collect and does not need to be mined and transported. (2) Harmless: The development and utilization of solar energy will not pollute the environment. It is one of the cleanest energy sources, which is extremely valuable in today's increasingly serious environmental pollution. (3) Huge: The solar radiation energy reaching the earth's surface every year is equivalent to about 130 trillion tons of coal, and its total amount is the largest energy that can be developed in the world today. (4) Long-term: According to the estimation of the rate of nuclear energy generated by the sun, the storage of hydrogen is enough to last for tens of billions of years, and the lifespan of the earth is also about billions of years. In this sense, it can be said that the energy of the sun is used for inexhaustible.