The ADK18V10W is suitable for battery capacities of 6v4.5ah; 6v7ah; 12v4.5ah & 12v7ah, and it takes 15-24hrs to fully charge a fan with the solar panel.
How to Use the Solar Panel:
Place the solar panel in the sun or any place where it can receive sunlight
Connect the power cord to the solar panel port in the appliance
The battery inside the appliance will start charging as long as there is sun and the cord is inserted to the appliance
Charging time with solar is 15 - 24hours depending on the sun intensity