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Here, this case study focuses on the Navajo Nation’s efforts to provided residential power access through solar photovoltaic systems to some of its approximately 34,000 remote off-grid tribal members. The solution the Nation has adopted in collaboration with Sandia National Laboratories offers insights into how the Navajo Tribal Utility Authority’s work could serve as a residential model to meet the needs of the 1.2 billion people globally who are without electrical residential power.