This section applies to the electrical installation of PV systems intended to supply all or part of an installation and/or feeding of electricity into the public grid. In this section, the equipment of a PV system, like any other item of equipment, is dealt with only so far as its selection and application in the installation is concerned. The electrical installation of a PV system starts from a PV module or a set of PV modules connected in series with their cables, provided by the PV module manufacturer, up to the user installation or the utility supply point. Requirements of this document apply to PV systems for supply to an installation which is not connected to a system for distribution of electricity to the public, PV systems for supply to an installation in parallel with a system for distribution of electricity to the public, PV systems for supply to an installation as an alternative to a system for distribution of electricity to the public, appropriate combination of the above. Requirements for PV systems with batteries or other energy storage methods are under consideration.