Also previously presented for the OEGlobal 2021 conference:
A newer project from Arizona State University, SolarSPELL (Solar Powered Educational Learning Library) initiative at ASU “combines curated digital libraries, solar-powered, offline technology, and the training to build information literacy and internet-ready skills in offline environments, focusing on the half of the world that remains unconnected.”
We had someone here too working on a similar project India (more resources in the replies0