I have been waiting for a sale on this Anker Power Bank. It is here $40 USD off. Mine will be here tomorrow. One of the many features this Power Bank has is a plug in for a solar panel to charge it.
Steadtep Soft Bag Compatible with Anker Power Bank, 60,000mAh PowerCore Reserve 192Wh, Charge Power Bank Storage Case Cover with Two Pockets for Battery Usb Cables and Accessories (Box Only)