Fast read
Battery safety is no accident—it’s the result of robust standards, smart technology, and professional installation. In Australia, all battery systems must comply with AS/NZS 5139, a safety standard that governs everything from installation location to fire barriers. Only Clean Energy Council (CEC)–approved battery products—now managed by Solar Accreditation Australia—can be used for rebate-eligible systems, ensuring your battery has passed rigorous testing.
Inside the unit, a Battery Management System (BMS) monitors voltage, temperature, and cell health to prevent faults. And above all, a properly accredited installer is your best defence against risks, from fire hazards to voided warranties.
What measures are in place to ensure the safety of battery installations?
Adding a home battery can feel like a leap toward energy freedom—but safety has to come first. Battery energy storage systems (BESS) are powerful, high-voltage devices. Without proper design, siting, and professional installation, they can pose risks such as electrical shock, fire, or even chemical exposure. Thankfully, Australia’s standards and certification frameworks are among the most comprehensive in the world, ensuring home batteries are safe, reliable, and future-ready.
What are the core safety standards in Australia?
The primary benchmark is AS/NZS 5139:2019, which defines safe installation practices for batteries paired with power conversion systems (like solar inverters). It includes requirements for:
- Installation locations: Batteries are not allowed in bedrooms, living areas, ceiling spaces, or under stairs. This protects people from rare but—serious incidents like thermal runaway.
- Clearances and barriers: Minimum distances from windows, doors, and appliances are mandatory. If a battery is placed near a habitable room, fire-resistant barriers may be needed.
- Ventilation: While most modern lithium batteries are sealed and safe, adequate ventilation still helps dissipate heat and maintain optimal performance.
- Electrical safety: Proper wiring, earthing, fusing, and isolation devices are required to prevent electrical faults.
These rules work alongside AS/NZS 3000 (the Wiring Rules) and are enforced by licensed electricians and accredited installers.
How does product selection contribute to safety?
Not all battery brands meet Australian safety requirements. To ensure quality, the Clean Energy Council (CEC) maintains an approved battery product list, now managed under Solar Accreditation Australia. These products must meet international benchmarks like IEC 62619, covering:
- Thermal runaway prevention
- Short-circuit and overcharge protection
- Robust internal fault management
Top-tier manufacturers—such as Tesla, BYD, Sungrow and Sigenergy—integrate Battery Management Systems (BMS) that act as the control centre of your battery. These systems:
- Monitor and balance individual cells
- Regulate temperature and charge levels
- Detect faults and shut down the system if needed
A good BMS helps prevent overheating, prolongs battery life, and provides vital peace of mind.
Why is a CEC-accredited installer essential?
Even a flawless product can become unsafe if installed poorly. That’s why using an accredited installer is non-negotiable. As of May 2024, battery accreditation falls under Solar Accreditation Australia, which ensures installers:
- Are trained in AS/NZS 5139 and other standards
- Understand manufacturer-specific requirements
- Can legally issue compliance certificates
- Stay updated through continuing professional development
Using a non-accredited installer can void warranties, affect home insurance, and lead to unsafe outcomes—especially if corners are cut on location, wiring, or commissioning.
What other installation practices enhance safety?
Safety isn’t just about standards—it’s about execution. Here’s what a good installer will consider:
- Siting and weatherproofing: Batteries must be protected from water ingress, direct sun exposure, and extreme temperatures. Outdoor units should have proper enclosures rated for the Australian climate.
- Fire protection: In some cases, additional measures like smoke alarms or compliant extinguishers may be needed. Lithium iron phosphate (LiFePO₄) batteries offer inherently safer chemistry and may reduce these needs.
- Signage and shutdown access: Installers must provide clear labelling and emergency instructions. This is especially important for firefighters or maintenance workers.
- System commissioning: A final inspection ensures every safety mechanism works as intended, from the BMS alerts to circuit protection.
What about ongoing safety and maintenance?
Today’s lithium batteries are designed to be low-maintenance, but not zero-maintenance. Ongoing safety steps include:
- Visual checks: Look for damage, corrosion, or unusual smells.
- Annual servicing: Some systems require periodic checks to ensure ventilation remains clear and electrical connections are solid.
- Alert awareness: Learn your system’s normal operating patterns. If warning lights appear or the system behaves oddly, contact your installer or battery supplier promptly.
Making the safe choice
Safe battery storage begins with informed decisions. Choose a CEC-approved product, have it installed by a Solar Accreditation Australia–accredited installer, and follow the relevant AS/ NZS standards. You’ll not only ensure the longevity and safety of your investment—you’ll protect your family, your home, and your long-term energy independence.
If you’re ready to take the next step, Your Energy Answers can connect you with accredited professionals who understand your site, your needs, and the safest way to achieve them.
