20W Monocrystalline Solar Panel Introduction： Solar energy refers to a type of energy in which light and heat radiated from the sun is harnessed by a growing range of technologies, such as solar thermal collectors, solar photovoltaics , solar thermal power generation, and artificial photosynthesis.   Since the formation of the earth, organisms have mainly survived on the heat and light provided by the sun, and since ancient times, humans have also known how to use the sun to dry objects and use it as a way to preserve food, such as making salt and drying salted fish. However, with the reduction of fossil fuels, there is an intention to further develop solar energy. There are three ways for humans to utilize solar energy, namely: photothermal conversion, photoelectric conversion and photochemical conversion.   Solar energy utilization technology is divided into active (active) and passive (passive) two. Active examples include solar photovoltaics and photothermal conversion, which use electromechanical devices for solar energy collection, and these devices rely on external energy to operate, so they are called active. Examples of passive sources include the introduction of sunlight into buildings for lighting, etc. The purpose of using solar energy is to use the design of the building and the selection of materials used. Since the operation does not require external energy, it is called passive.     Advantages of 20W Monocrystalline Solar Panel： Here are some advantages of monocrystalline solar cells: They are the most efficient at 15-20% Due to their high efficiency, they require less space than other types Manufacturers say this form of solar cell lasts the longest, and most come with a 25-year warranty They perform better in low levels of sunlight, making them ideal for cloudy areas. FAQ: 1.Q. Can we print our own logo? A. Yes,we offer OEM service.   2.Q. Do you provide sample? A. Yes,we provide sample and the sample cost will be reback to you when confirm the order   3.Q. What's your products? A. Sleeping bags、Lay bags、Folding Chairs, Zero Gravity Chair,Beach Chair and Folding Bed outdoor products.   4.Q:What's the MOQ for your products? A:Usually 10 carton.