1.1 Scope. 1.1.1 This standard shall apply to the design, construction, and installation of stationary fuel cell power systems. 1.1.2 The scope of this document shall include the following: (1) A singular prepackaged, self-contained power system unit (2) Any combination of prepackaged, self-contained power system units (3) Power system units comprising two or more factory-matched modular components intended to be assembled in the field (4) Engineered and field-constructed power systems that employ fuel cells.