Connectivity off the grid is hard to maintain. If you think your device will stay connected while bicycle touring, hiking, or camping in the most scenic, tranquil, important, and distant reaches you are mistaken. If you venture far enough away from it all you will drop connectivity during your adventure. This is not a problem it is a ‘feature’ of adventuring.
Charging electronics off the grid is as much about your approach as it is about the equipment. I desire to find myself in unpopulated areas where charging electronics via a wall outlet is impossible. I need generate my own power for charging electronics off the grid. I accept this. The best method for charging electronics off the grid right now are solar chargers, cache batteries, and dynamos.