Article 710 covers stand-alone electrical power systems that operate independently of the utility grid. These off-grid systems commonly use solar PV, generators, batteries, wind turbines, or a combination of power sources to supply electricity where utility power isn't available or isn't used. The article establishes requirements for system capacity, equipment approval, source identification, wiring methods, and safe installation practices to ensure reliable and code-compliant operation. If a system is interconnected with the utility, Article 705 applies instead.