Yes, it's detachable. 

Question for the manufacturer. Thin film solar panels are made by other manufacturers. This is the kind of solar panel the average person could afford. Check out "Allpower 100-watt portable, folding solar panel" for backpacking with power bank. 

No, there is no built-in battery in this solar panel. But it supports all the power banks charging, so that you can store power for using. 

Yes, the hunting camera comes with a solar panel with a 3m cable, the solar panel can be adjusted to suit the location and How do you get the electricity? How much capacity does the hunting camera have The product itself has a battery capacity of 7800mAh and is powered by the solar panel. Please fully charge it with the adaptor before use. You do not need to remove it often to charge it in summer and in sunny places 

Yes, but you need to contact us to purchase the bracket and extension cable separately, the extension cable is 2M