Source: Worksafe New Zealand
Photovoltaic (PV) solar systems are a rapidly growing industry in New Zealand, with the installation of both grid-connected and stand-alone systems.
WorkSafe recommends using a registered electrician to install PV systems. This is because homeowners installing a PV system themselves without the proper experience or knowledge could cause fires and electric shocks. And some PV systems are not suitable for New Zealand and should not be installed.
DIYers are limited to which PV systems they can install themselves lawfully by the voltage it uses. Systems that involve voltages exceeding 50V AC or 120V ripple-free DC require a registered electrician to install them. If parts of the PV system involve 230V terminations this also requires an electrician.
The use of ECP51 (homeowner/occupier’s electrical wiring work in domestic installations) does not cover work on PV systems. More information on what ECP51 covers can be found in the electrical codes of practice.
For systems involving battery storage, consideration should be given to how these types of systems are installed, along with the location of the batteries. Some battery systems can produce flammable gases, so following the correct installation requirements is critical to prevent injuries and property damage.
There are different standards for grid-connected and stand-alone PV systems. It is important to use the right standard/s for the PV system being installed:
- Grid-connected:
- AS/NZS 5033 for the PV panels
- AS 4777.1 for the inverter installations
- AS/NZS 5139 for the batteries (best practice)
- Stand-alone: AS/NZS 4509
An important warning for anyone with a PV system is that if they have a problem with their PV system at any time to immediately turn the system off and contact their electrician.
