"An off-grid solar system (off-the-grid, standalone) is the obvious alternative to one that is grid-tied. No access to the utility grid Off-grid solar systems can be cheaper than extending power lines in certain remote areas. Become energy self-sufficient Living off the grid and being self-sufficient feels good. For some people, this feeling feeling is worth more than saving money. Energy self-sufficiency is also a form of security. Power failures on the utility grid do not affect off-grid solar systems."