The Solar Energy Industries Association, the leading trade group for solar developers, defines utility-scale solar as greater than 1 megawatt. One aspect of utility solar is that it is larger than commercial and  can be used to provide power to larger facilities.

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Another aspect of utility-scale solar facilities is that it is used to generate solar power to feed into the grid, supplying a utility with energy. Another point of consistency is that almost every utility-scale solar facility has a Power Purchase Agreement (PPA), guaranteeing a market for its energy for a fixed term of time.