DOKIO 300W Portable Folding Monocrystalline Solar Panel Kit for Charging 12v Battery with Controller USB Output Waterproof for Camping Caravan Boat

Solar panels are subject to the intensity of sunlight and the angle of sunlight. They have different effects on energy and current, and they do not always maintain the highest current. It is recommended to add battery use.
DOKIO Powerful and Multipurpose Solar Panel 300W Unique foldable design, enable to be mounted on an RV, boat, cabin, tent, car, tree or any other irregular surface. Making it perfect for home, nature trips, hiking, camping, fishing, picnic, sailing or other outdoor activities. 
Specification 
*Maximum Power: 300W
* Maximum Power Point :16.67A
* Optimum Operating Voltage (Vmp): 18V
* Short-Circuit Current (Isc):16.92
* Open-Circuit Voltage (Voc): 22.5V
* Maximum System Voltage:600V DC (UL)
*Foldable Dimension: 20.87in x 5.12in x 1.18in
* Net Weight:7.1kg
*Package Weight:7.3kg (including wire and controller) 
Package Contents:
1 x DOKIO 300W Foldable solar panel 
1x DOKIO inverter solar controller 
1xDOKIO 3 MeterConnecting cable