The ALLPOWERS 12V 50W Bendable SunPower Solar Panel is made of monocrystalline cells, which are known to be more efficient than other types of solar cells. Additionally, this panel has a high cell efficiency of up to 23.5%. It is also semi-flexible so that you can mount it on curved surfaces and more. It works in a wide range of temperatures and can withstand up to 5400Pa of pressure. Finally, it comes with a limited warranty of 18 months. That means you can be sure that it will work well for a long time.