AS/NZS 5033 is the standard every Australian solar installer works to, and it shapes what your single line diagrams need to show. This is a plain-English overview of how the standard relates to SLDs, so your compliance documentation holds up.
What is AS/NZS 5033?
AS/NZS 5033 is the Australian and New Zealand standard for the installation and safety of photovoltaic (PV) arrays. It covers how a PV array is designed and installed safely, including array configuration, voltage limits, isolation, wiring and labelling. Compliance with it is fundamental to a safe, certifiable solar installation.
How AS/NZS 5033 relates to your SLD
Your single line diagram is one of the documents that demonstrates the installation meets the standard. While the standard governs the physical installation, the SLD is where the electrical design is shown clearly, so the two need to agree. A compliant SLD should accurately reflect the array, protection and isolation the standard requires.
Key elements an SLD should show
- Array configuration, strings, modules per string and how they connect to the inverter's MPPT inputs.
- DC isolation and protection on the array side.
- Inverter details and AC isolation.
- Maximum voltage considerations, calculated for the lowest expected temperature.
- Cabling, fusing and labelling consistent with the installation.
Keeping documentation compliant
Because standards are periodically updated, always work to the current published version of AS/NZS 5033 and your network operator's requirements. Generating your SLD from the actual system design, rather than editing a generic template, reduces the risk of the diagram and the install drifting out of sync. Solar Proof's SLD editor is built around these requirements.
This article is general information, not compliance advice. Always refer to the current version of AS/NZS 5033 and relevant network and accreditation requirements.
The bottom line
AS/NZS 5033 governs safe PV array installation, and your single line diagram is a key part of showing the design meets it. Keep your SLD accurate to the install, work to the current standard, and your documentation will stand up to scrutiny. See also what a single line diagram is.
