With the newly introduced andrakk solar power products, you don’t need to depend on electric power supply or electric generator set to get maximum comfort at your home or office.With andrakk adk 18v/10w mini solar panel, you can take advantage of the abundant sunlight to charge your rechargeable fans and lanterns. No more total reliance on nepa. 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.