Does AS/NZS 5139 apply to my telecom, UPS or substation battery?
Usually not, and this is the most commonly misapplied standard in the Australian battery market.
AS/NZS 5139:2019 covers battery systems used with power conversion equipment, 12 V to 1500 V DC, capacity 1 kWh to 200 kWh. It explicitly excludes:
- telecommunication applications
- uninterruptible power systems in accordance with AS 62040
- premises with critical power continuity requirements, such as acute care hospitals
- electric vehicles, portable equipment and transportable structures
So a battery bank in a telecom cabinet, a UPS battery string in a data centre, and a substation DC tripping battery are generally not governed by 5139. What governs them instead is AS 3011 and AS 2676 for installation, maintenance and testing, AS 4044:2024 for the charger, AS 60896.22:2023 for the product, and AS 62040 for the UPS itself.
Why it matters in both directions: applying 5139 where it does not belong adds cost, clearance requirements and delay to a project that does not need them. Missing it where it does apply, a battery energy storage installation in a building, fails inspection.
Almost no content in this space gets this right, because most of it is written for residential solar and then reused for industrial applications. If you are being told a telecom battery installation needs a 5139-compliant battery room, ask which clause.