Made of high-quality materials, environmentally friendly, durable and delicate. It has a high conversion rate. Dual-output solar panels with USB interface to meet any of your requirements. Environmental protection and pollution-free, realizing the conversion of solar energy to electric energy A solar panel has a wide range of applications and can be used in many places, such as automobiles and small household appliances. A solar panel is a device that directly or indirectly converts solar radiation into electrical energy by absorbing sunlight. Compared with ordinary batteries and rechargeable batteries, solar panels are more energy-efficient and more environmentally friendly.<br><br>Solar panel power: 20W Controller peak power: 300W USB output: 5V Number of USB ports: 2 Open circuit voltage (VOC): 5V Short circuit current (Isc): 3A Output: USB Material: polysilicon colour: black<br><br>Package Contents: 1 x Solar Panel 1 x Controller<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.