This is the Zopec Photons 200 Pro Solar Charger. (Note: Each Zopec battery has a designed solar charger (full sun charging time listed). Zopec Explore 40 Lite (3-4 hrs) is designed for Explore Mini and 4000. Zopec Photons 60Pro (4-8 hrs) is designed for Explore 5500, 5700, 8000, 8200 and Zopec Voyage. Zopec Photons 100 Pro (10 hrs) is for Explore Oxygen. Zopec Photons 200 Pro (10 hrs) is for Zopec OxygenPro 4XL and 8XL. For cloudier weather, upgrade to higher model for the same charging time). F