What components are included in a PV system according to Article 690?

The components included in a photovoltaic (PV) system according to Article 690 of the National Electrical Code specifically encompass modules, inverters, conductors, and overcurrent devices.

Modules are the solar panels that convert sunlight into electricity. Inverters play a crucial role by converting the direct current (DC) produced by the solar panels into alternating current (AC), which is the form of electricity used in most homes and businesses. Conductors are the wiring that connects the components of the PV system, ensuring that the generated electricity can flow to its intended destination. Overcurrent devices, such as fuses or circuit breakers, are essential for protecting the system from excessive current, thereby preventing potential damage or hazards.

When looking at the other choices, while inverters and transformers are essential in certain electrical setups, they do not collectively form a comprehensive list of the main components of a PV system. Batteries and chargers, mentioned in another choice, might be part of a battery storage system but are not universally included in every PV installation. Furthermore, standard electrical devices like switches, outlets, and junction boxes, although important in electrical installations, are not specific to PV systems as outlined in Article 690. This distinction helps solidify why the specified components in the correct option are