The Arizona Republic has a good article on residential solar on the Hopi and Navajo reservations in Arizona and New Mexico. Even after years of legislative push, large swaths of Native American localities still lack access to electricity. More than 15,000 Hopi and Navajo households live without electricity, according to officials.
Now, crowdsourced and community-level efforts are leading the way in providing reliable energy sources to native homes.
See the article 15,000 Native American families live without electricity. How can solar power help? (May have a subscription requirement)