On a local level, I feel like we can probably do better than just text messaging capabilities. Mesh network covering the village, with someone running mirrors of essential services in their basement (local email routing, wikipedia, etc)
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At most you will only be able to start a few Android-phone hotpspots and share files. That is the reality of it.
At most you will be able to charge smartphones and small devices with solar panels. Keeping a larger Wi-Fi router running only on solar? Very seldom.
It will not be a problem at all to power it completely on a small 100W panel.
You can even use a (right-sized) lead-acid battery without a charge controller, as they're pretty resilient, unlike lithium-based batteries. This will both store power for night and stabilize the voltage. The lifetime would be a bit shorter. You can literally just parallel your solar panel, battery, and whatever you want to power, and it has a pretty good chance of working.