Battery installers know the standard, but claims fail when evidence of compliance is missing. Under the Cheaper Home Batteries Program, compliant installation is a condition of creating STCs.
What the standard covers
AS/NZS 5139 sets requirements for the safe installation of battery systems. In summary:
- Location restrictions. Batteries cannot go in some areas, such as habitable rooms, ceiling spaces and certain locations near exits or escape paths.
- Clearances. Minimum distances from doors, windows, ignition sources and other equipment.
- Protection. Fire-resistant barriers and mechanical protection where required.
- Ventilation and environment. Conditions for the product’s rating.
- Labelling and signage. Required warnings and identification.
- Isolation and protection. Disconnects and protective devices.
The standard is detailed. Always use the current edition and the product manufacturer’s instructions.
How it connects to STCs
Battery STCs depend on a CEC-approved battery, VPP capability, an accredited installer and a compliant install. New photo and evidence rules from 1 March 2026 mean your photos have to show the installation location, clearances and labelling. The battery submission guide lists what to capture.
Practical tips
- Plan the location at the quote stage, before you promise a customer a spot.
- Photograph clearances with a tape measure in frame where useful.
- Capture labels and the isolators.
- Keep the commissioning record with the claim.
Customer conversations
Many customers want a battery in the garage, a hallway or a cupboard near the switchboard, which may not comply. Have a plan for explaining why an alternative location is needed, with a simple diagram or photo, and note the discussion in the job file. If the customer insists on a non-compliant position, decline the job. Placing a battery where it breaks the standard is a safety risk and a certificate risk, and the customer will not thank you later.
What this means for installers
Treat the standard as part of the STC claim, not only a safety document. Our battery STC page explains how battery certificates are settled, the installer guide to the program covers the rules, and the resources hub has the photo guides.