As Australia embraces renewable energy, more homeowners are considering solar battery storage systems. While these systems offer significant benefits, it’s crucial to understand the regulations that govern their installation.
In Victoria, installers follow strict Australian Standards and regulator guidance to make sure batteries are placed safely, away from exits and openings, separated from gas equipment, and protected from heat and impact. The aim is simple: keep people safe, protect the home, and ensure the system works as designed through winter cold snaps, humid summer spells, and everyday high loads like heating and EV charging.
Read this first.
Victoria follows AS/NZS 5139:2019 and AS/NZS 3000:2018 (Wiring Rules) for residential battery installations. Energy Safe Victoria and the Electrical Regulatory Authorities Council publish plain-English guidance that sets out exactly where you can and cannot install a battery, plus the clearances, barriers and exclusions you must meet. The highlights below are pulled from those regulator guides and the latest product manuals.
The aim is simple: place the battery where it cannot be struck, overheated, or block an escape path, and separate it from habitable rooms, openings and ignition sources with prescribed distances and non-combustible barriers.
Where a battery must not be installed.
Before picking a spot, Victoria has clear rules on where home batteries must not go. These guard against fire and impact risk, keep exits clear, and avoid gas or heat hazards. Use the no-go list below as a guide, then have a licensed installer check your site and apply AS/NZS 3000 and local distributor requirements across Melbourne and Gippsland.
- Hazardous areas as defined in AS/NZS 3000, including gas cylinder and relief-vent exclusion zones. Local gas networks may add extra meter clearances.
- Passageways, walkways, exits and evacuation routes, and under stairs or escape routes. Also keep away from narrow exits and doorways, as set out below.
- On roofs, within ceiling spaces, or set into wall cavities. Recessed installs are only allowed if placed in a separate non-combustible enclosure that is sealed to the cavity.
- Locations where switchboards or generators are banned under AS/NZS 3000.
- Habitable rooms in domestic/residential settings, per Energy Safe Victoria’s guidance.
What counts as a "habitable room" in Victoria?
Energy Safe Victoria aligns with the NCC definition. Habitable rooms include bedrooms, living/family rooms, kitchens, dining rooms, studies, playrooms and sunrooms. Non-habitable rooms include bathrooms, laundries and powder rooms. If a space could reasonably be used as a bedroom or living area in future, treat it as habitable for compliance.
Placement rule: A battery cannot be mounted directly on a wall that has a habitable room on the other side. If that wall is the only practical location, you must install a compliant non-combustible fire barrier sized to the standard (extended side and above the unit) before mounting the battery, or choose an alternative non-habitable/external wall.
Minimum distances from openings, exits and appliances.
These are regulator-endorsed minima. Your installer must meet all of them and any stricter manufacturer requirements.
Openable windows and vents into habitable rooms
- Keep the battery at least 600 mm horizontally and 900 mm below any opening window or ventilation outlet into a habitable room.
Doors, exits and wide openings
- Do not install a battery within 600 mm of an exit whose opening is ≤ 900 mm wide.
- For wider openings such as garage doors, there must be enough clearance so a person can pass more than 1000 mm from the nearest side of the battery. Treat frequently used yard gates as exits.
Other electrical appliances
- Keep unrelated electrical appliances (hot water units, A/C outdoor units, motors, cooktops, heat pumps and similar) at least 600 mm horizontally and 900 mm above the battery. Switching devices and socket outlets are not counted as appliances for this rule.
Gas equipment (Victoria specifics)
- Maintain gas hazardous-area separations per AS/NZS 3000.
- In Victoria, the gas meter vent has an exclusion of 1000 mm diameter around the vent and 1500 mm in the direction of discharge. Refer to page 6
Fire-barrier requirements when a wall backs a habitable room.
If the battery is mounted on or within 300 mm of a wall that has a habitable room on the other side, you must install a non-combustible barrier on that wall to delay fire spread. Accepted materials (no extra test evidence required) include brick/masonry block, concrete, compressed cement sheet, and ceramic/terracotta tiles. The barrier must:
- Extend 600 mm beyond each vertical side of the battery
- Extend 900 mm above the top of the battery
- If the top is within 900 mm of the ceiling, also protect the ceiling for 600 mm beyond the battery’s outer edge at the same level
- Have no perforations; any opening > 5 mm must be sealed with fire-retardant sealant
Windows and thin metal sheeting are not automatically non-combustible unless tested to AS 1530.1.
Access, egress and impact protection.
- Provide safe egress space. Victorian guidance notes a minimum 1 metre around the battery to allow people to move past safely in an emergency.
- Do not locate where vehicle impact may occur, such as in the sweep of a car in a garage or driveway. If unavoidable, install bollards or other impact protection.
When are bollards required?
Bollards (or another physical barrier) are required whenever a battery could be struck by a vehicle, most commonly in garages or any indoor spot within a car’s driving/swing path. The national regulators’ ERAC guidance (which interprets AS/NZS 5139) is explicit: if vehicle damage may be expected, you must add protection.
What does “compliant bollard” mean in practice?
The standard is outcome-based: the barrier must prevent vehicle contact. It does not prescribe exact sizes, so installers choose hardware suited to the site and slab. Typical practice is a fixed steel bollard anchored to the concrete slab, positioned so it protects the full width of the battery’s plan area without intruding on the manufacturer’s required service/airflow clearances in front of the unit.
Common choices used in the industry (examples, not mandates) include surface-mount steel bollards around 900 mm high and 70–100 mm diameter, often powder-coated with reflective bands for visibility; these are sold specifically for battery protection by Australian wholesalers.
Are bollards mandatory in every garage?
No. They are mandatory where a vehicle could hit the battery. If the unit is well outside any drive/swing path—say, behind a permanent bench or walled-off bay that already prevents contact—then a bollard may not be needed. The compliance test is simply: can a vehicle make contact? If yes, install a barrier; if no, document why it is not required.
Manufacturer clearances still apply.
AS/NZS rules set the minimum legal floor. You must also apply the product manual clearances for airflow and service access. Example for Tesla Powerwall 3 (Australia manual):
- Left/right sides: ≥ 100 mm
- Above: ≥ 50 mm
- Below: ≥ 20 mm
- Between side-by-side units: ≥ 100 mm (Tesla recommends 150 mm for wiring access)
- In front: ≥ 300 mm working space
- Max height: bottom of feet ≤ 1140 mm above ground; mount on a flat, unobstructed surface; do not cover vents.
Indoor vs outdoor placement.
- Outdoors or garages are typically preferred, provided all the opening, exit, appliance and gas separations above are met.
- Indoors is generally restricted and not permitted in habitable rooms in domestic installations under current Victorian guidance. Where indoor placement is allowed, all barrier and clearance rules apply.
Other compliance items your installer handles.
- Testing and verification: All work must be tested to AS/NZS 3000 to verify compliance with AS/NZS 5139.
- Labelling, earthing, wiring protection, documentation and commissioning per AS/NZS 5139 sections 4–6, with additional inverter and PV requirements in AS/NZS 4777.1 and AS/NZS 5033 where relevant.
Local note for Melbourne & Gippsland homes.
Regional properties often use three-phase power and have higher winter loads. If you need whole-home backup or have EV charging, plan battery size and placement early so your chosen spot meets the rules and gives space for extra capacity later. Pair the siting work with a quick check of gas meter position, A/C condenser locations, and walkway widths to avoid redesigns at install time.
Why choose Uncommon Solar for your battery install.
We have completed many home battery installations across Melbourne and Gippsland and we follow the rules to the letter. Every job is designed and installed to AS/NZS 5139 and AS/NZS 3000, with Energy Safe Victoria guidance applied on site. Clearances are measured, barriers fitted where required, impact protection added in garages, and all commissioning photos and compliance paperwork provided at handover. Our work is built to pass inspection and to perform safely through winter cold snaps, humid summers, and everyday high loads.
If you want a battery installed properly, you can trust Uncommon Solar to handle it from site check to sign-off.
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