Wikipedia
Off-the-grid is a system and lifestyle designed to help people function without the support of remote infrastructure, such as an electrical grid. In electricity, off-grid can be stand-alone power system or mini-grids typically to provide a smaller community with electricity. Off-grid electrification is an approach to access electricity used in countries and areas with little access to electricity, due to scattered or distant population. The term off-the-grid (OTG) can refer to living in a self-sufficient manner without reliance on one or more public utilities. People who adopt this lifestyle are called off-gridders.
Off-the-grid homes are autonomous; they do not rely on municipal water supply, sewer, natural gas, electrical power grid, or similar utility services. A true off-grid house is able to operate completely independently of all traditional public utility services. The idea has been recently popularized by certain celebrities including Ed Begley, Jr. who stars in the Living with Ed television show on the Home & Garden Television (HGTV) network. Actress Daryl Hannah promotes off-grid living and constructed her home in Colorado according to those principles, as does survival expert and Dual Survival co-star Cody Lundin, who lives in a self-designed, passive solar earth house in the high-desert wilderness of Northern Arizona, collecting rainwater, composting waste, and paying nothing for utilities.