There are many requirements to a Solar Installation including many terms used by the industry professionals to describe the services provided, required and standards.
These include definitions of appliance vs. fittings, L.V. vs E. L.V., Prescribed Electrical Work (PEW) and Record of Inspection (ROI). Along with installation standards AS/NZS 3000, AS/NZS 5033, electrical safety standards for fittings like AS/NZS 4777.1 or other requirements for Battery Energy Storage Systems (B.E.S.S) that have been introduced more recently.
A quick overview of these requirements is included here by following this link to the SEANZ website.
Certification requirements for Solar Photovoltaic (PV) Systems From MBIE: Energy Safety