The NSW apartment battery rebate is opening a new opportunity for strata buildings from 1 September 2026. Through the new BESS3 activity under the Peak Demand Reduction Scheme (PDRS), eligible apartment buildings can receive an incentive toward a shared battery installation.
For an owners corporation, a shared battery has traditionally been a difficult project to justify. The building needs enough usable space, the economics have to work for multiple lot owners, and getting a major energy project approved by a general meeting can take time.
BESS3 changes the equation.
The NSW Government has introduced a dedicated apartment-building battery incentive that can reduce the upfront cost of installing an eligible battery, with a larger incentive available when a new battery is installed alongside new solar. The incentive is available from 1 September 2026.
But there is an important catch:
The BESS3 rebate does not simply pay for every kilowatt-hour of battery capacity you install.
The scheme limits the battery capacity it counts based on the number of dwellings, inverter output and other eligibility requirements.
For a strata committee, understanding those limits before requesting quotes can make a major difference to the business case.
NSW Apartment Battery Rebate at a Glance
| Feature | BESS3 apartment battery incentive |
|---|---|
| NSW scheme | Peak Demand Reduction Scheme |
| Activity | BESS3 – Install a battery in an apartment building |
| Start date | 1 September 2026 |
| Building type | BCA Class 2 apartment building |
| Minimum dwellings | 4 |
| Eligible usable battery capacity | More than 20 kWh and up to 200 kWh |
| Maximum incentive-counted capacity | 5 kWh per dwelling, subject to other limits |
| Battery location | Outdoors |
| Battery warranty | Minimum requirements apply |
| Solar required? | No |
| Higher incentive | Available when eligible new battery is installed with new solar |
| Incentive mechanism | Peak Reduction Certificates |
| Customer payment | Usually reflected as an upfront discount |
The official NSW rules confirm that BESS3 commences on 1 September 2026 and applies to eligible Class 2 apartment buildings with at least four dwellings and usable battery capacity above 20 kWh and up to 200 kWh.
What Is the NSW BESS3 Apartment Battery Rebate?
BESS3 is a new activity under the NSW Peak Demand Reduction Scheme.
The PDRS is designed to reduce electricity demand during periods when demand on the electricity network is high. Instead of being a conventional fixed cash rebate, the scheme uses Peak Reduction Certificates (PRCs) that can be created for eligible projects and traded for value.
For apartment buildings, BESS3 creates an incentive for installing shared behind-the-meter battery storage.
The NSW Government describes the apartment incentive as an upfront discount included in the battery installation quote, with a larger discount available when the battery is installed together with new solar capacity.
This is particularly significant for strata buildings because apartment residents have historically had fewer opportunities to take advantage of battery incentives designed around individual homes.
The NSW Government introduced BESS3 specifically to help address that gap.
When Does the NSW Apartment Battery Rebate Start?
BESS3 starts on 1 September 2026.
IPART confirms that three new battery activities under the PDRS commence on this date:
● BESS3 — apartments
● BESS4 — small and medium businesses
● BESS5 — commercial and industrial businesses
That means a strata committee considering a battery project does not need to wait until September to start planning.
The better approach is to begin the assessment, obtain comparable quotes, assess the building’s electrical configuration and prepare the owners corporation decision now.
Who Is Eligible for BESS3?
BESS3 is specifically designed for eligible apartment buildings.
The project must satisfy a number of requirements.
Class 2 Apartment Building
The building must be classified as Class 2 under the Building Code of Australia.
It must also contain at least four individual dwellings.
Mixed-use buildings require particular attention because a property containing shops, offices or other uses does not automatically mean the entire building meets the Class 2 requirement.
Check the building classification early.
Battery Capacity Above 20 kWh
The combined usable battery capacity must be greater than 20 kWh and no more than 200 kWh.
Importantly, usable battery capacity is not necessarily the same as the battery’s advertised nominal capacity.
Under the current PDRS definition, usable battery capacity is calculated as 90% of nominal battery capacity for the relevant battery activities.
That means a battery marketed as 50 kWh may have approximately 45 kWh of usable capacity for scheme calculations, depending on the approved product information.
Inverter Relationship
The battery must also satisfy specified capacity requirements relative to the inverter output. The PDRS rules impose a maximum relationship between usable battery capacity and inverter power.
This means you should not treat battery size and inverter size as separate purchasing decisions.
Battery Warranty
The BESS3 requirements include minimum warranty conditions, including requirements relating to retained usable capacity over time.
When comparing quotes, ask installers to state the applicable warranty in writing.
Outdoor Installation
This is one of the most important practical requirements.
Eligible BESS3 batteries must be installed outdoors and in accordance with applicable requirements, including AS/NZS 5139.
For apartment buildings, this can be a major design issue.
A basement car park or internal plant room may appear to be the most obvious location, but an indoor location may not satisfy BESS3 eligibility.
That means the physical battery location should be assessed before the strata committee becomes committed to a particular system.
The Biggest BESS3 Limitation: 5 kWh Per Dwelling
This is the rule strata committees need to understand before they compare battery quotes.
BESS3 does not necessarily reward every kWh you install.
The scheme applies a 5 kWh per dwelling cap when calculating the eligible capacity.
For example:
10-apartment building
10 dwellings × 5 kWh = 50 kWh
So even if the building installs a 100 kWh usable battery, only 50 kWh may count toward the relevant incentive calculation.
20-apartment building
20 dwellings × 5 kWh = 100 kWh
40-apartment building
40 dwellings × 5 kWh = 200 kWh
The official NSW material confirms the 5 kWh-per-dwelling limit, and the scheme’s calculation also incorporates the battery’s usable capacity and inverter output.
This has a major commercial implication:
Do not size the battery around the rebate alone.
Size it around the building’s energy requirements, then determine how much of that battery the incentive actually recognises.
How BESS3 Calculates the Eligible Battery Capacity
The calculation can be simplified to three competing limits.
The scheme considers the smallest of:
1. The battery’s usable capacity
2. 5 kWh × number of dwellings
3. 4 kWh × inverter output in kW
The smallest number determines the capacity that is counted for the incentive.
Example: 10-Unit Building
Suppose an apartment building has:
● 10 dwellings
● 100 kWh usable battery
● 20 kW inverter
The three limits are:
● Usable battery capacity = 100 kWh
● Dwelling cap = 10 × 5 = 50 kWh
● Inverter-related limit = 20 × 4 = 80 kWh
The smallest number is:
50 kWh
Therefore, only 50 kWh is counted for the BESS3 calculation.
The remaining 50 kWh can still provide energy storage to the building, but it does not receive additional incentive value simply because it was installed.
This is why dwelling count should be one of the first numbers considered when designing the project.
How Much Is the NSW Apartment Battery Rebate Worth?
There is no single fixed dollar rebate for every apartment building.
The incentive is based on the number of eligible Peak Reduction Certificates generated and the market value of those certificates.
The certificate price can move over time, so an amount quoted today should not be treated as a guaranteed government payment.
The supplied modelling uses an illustrative $3.00 per certificate and shows the following examples for buildings with new solar in the Ausgrid network area.
| Building | Usable Battery | Counted Capacity | Illustrative Certificate Value |
| 8 dwellings | 40 kWh | 40 kWh | $13,476 |
| 10 dwellings | 100 kWh | 50 kWh | $16,848 |
| 20 dwellings | 100 kWh | 100 kWh | $33,696 |
| 40 dwellings | 200 kWh | 200 kWh | $67,392 |
| These figures are illustrative rather than guaranteed because certificate prices can change. |
NSW guidance describes the incentive as an upfront discount applied through the installation quote rather than a fixed payment that the owners corporation receives directly.
Why the Number of Apartments Matters So Much
Consider two buildings that both install a 100 kWh usable battery.
Building A
10 dwellings
Maximum dwelling-based counted capacity:
10 × 5 kWh = 50 kWh
Building B
20 dwellings
Maximum dwelling-based counted capacity:
20 × 5 kWh = 100 kWh
The physical battery is identical.
The incentive treatment is not.
This is one of the most unusual features of BESS3 compared with many other battery incentives.
For a strata committee, it means the number of dwellings should be part of the first financial calculation.
How the BESS3 Incentive Is Calculated
The underlying calculation uses the scheme’s demand shifting component.
In simplified terms, the calculation involves:
Counted battery capacity × applicable rate × 900 × network loss factor
The applicable rate depends partly on whether the battery is installed alongside qualifying new solar.
The relevant network loss factor varies between the NSW distribution networks.
For example, the source material identifies:
● Ausgrid: 1.04
● Endeavour Energy: 1.05
● Essential Energy: 1.05
The formula is not something an owners corporation should normally have to calculate manually.
The installer or Accredited Certificate Provider should provide the project-specific incentive calculation.
However, understanding the structure helps a committee identify whether a quotation is making sensible assumptions.
Does BESS3 Require Solar?
No.
An eligible apartment battery can qualify without new solar.
However, BESS3 provides a higher incentive rate where the battery is installed alongside new solar capacity within the required timeframe and the solar has not received NSW Government funding.
The supplied modelling uses:
● 0.12 for qualifying battery installations following new solar
● 0.0853 for battery-only installations
That difference can materially affect the certificate value.
The NSW Government also says the discount is larger where a new battery and new solar are installed together.
What If the Apartment Building Already Has Solar?
An existing solar system does not automatically provide access to the higher BESS3 rate.
According to the supplied scheme guidance, the higher rate applies where the battery is installed within 90 days of qualifying new solar.
That means a building with older solar may have two broad options:
Option 1: Battery Only
Install the battery and receive the lower incentive rate, assuming all other eligibility requirements are met.
Option 2: New Solar + Battery
Install qualifying new solar and the battery within the required 90-day window to access the higher rate.
The second option can make sense where the building has sufficient roof space and the solar system itself provides meaningful electricity savings.
But this needs to be assessed as a complete project.
Why Combining Solar and Battery Can Make Sense for Strata
A shared battery can do more than earn an incentive.
When combined with shared rooftop solar, it can help the building store electricity generated during the day and use that energy later.
That can be particularly useful for common property electricity consumption.
For example:
● Lifts
● Corridor lighting
● Car-park lighting
● Pumps
● Ventilation
● Security systems
● Common-area equipment
Solar generation often peaks during the day, while some building loads continue into the evening.
A battery can shift some of that solar energy to later periods.
The NSW Government says apartment batteries can help reduce electricity costs by storing and using more solar energy and can also provide backup where the system is configured for it.
Can an Apartment Battery Provide Blackout Backup?
It can, but backup power is not automatic.
A battery system must be designed and configured to provide backup power.
For a strata building, the most practical approach may be to protect nominated common services rather than every electrical load.
Potential priority services may include:
● Emergency systems
● Security equipment
● Common-area lighting
● Communications equipment
● Selected pumps
● Other nominated essential services
The exact backup capability depends on the battery, inverter, switchboard arrangement and system design.
When comparing quotes, ask:
Which common-property loads will actually remain operational during a grid outage?
Do not assume that installing a battery automatically provides whole-building backup.
Where Can a BESS3 Battery Be Installed?
Location is one of the biggest practical challenges for apartment buildings.
BESS3 requires the battery to be installed outdoors, subject to the relevant rules and standards.
That can make some conventional apartment locations unsuitable.
For example, a strata committee might initially consider:
● Basement car park
● Plant room
● Electrical room
● Storage area
But the BESS3 requirements mean the physical installation location needs to be assessed carefully.
This is why a site inspection should happen before the owners corporation settles on a project budget.
A battery that works financially on paper may be much more difficult to install if there is no suitable compliant outdoor location.
BESS3 and Embedded Networks
Some apartment buildings operate an embedded network.
An embedded network is a private electricity network in which electricity is purchased from the grid and then supplied to residents within the building.
BESS3 can therefore have an important role in buildings where a shared battery is connected to an embedded network or used for common services.
However, the electrical and commercial arrangements can differ substantially between buildings.
The battery project should therefore be assessed alongside:
● Existing metering
● Common-property electricity usage
● Embedded network arrangements
● Solar configuration
● Battery location
● Network connection
● Future electricity demand
This is one area where a generic residential battery quote is unlikely to be sufficient.
Who Owns the Battery?
A shared apartment battery is generally a building-level infrastructure project, not a private asset belonging to one apartment owner.
The owners corporation makes the decision for the common property, subject to the relevant strata approval process.
That means the committee needs to think beyond the equipment itself.
The project should also answer:
● Who owns the battery?
● Who controls it?
● Who pays for maintenance?
● How is electricity allocated?
● Who receives the financial benefit?
● What happens if an owner sells their apartment?
● What happens if the building changes its electricity arrangement?
These questions should be addressed in the proposal before the project goes to the owners corporation.
How Does a Strata Committee Approve a Battery Project?
A battery project is a collective decision rather than an individual household purchase.
The strata committee typically needs to prepare the groundwork, obtain quotes and provide the owners corporation with enough information to make an informed decision.
The exact approval process depends on the nature of the project and the relevant provisions of NSW strata legislation.
The supplied source notes that certain sustainability infrastructure resolutions may have different voting thresholds, and recommends confirming the proposed resolution wording with the strata manager and, where appropriate, obtaining legal advice.
This is important because a battery project can involve:
● Common property
● Capital expenditure
● Electrical infrastructure
● Roof or external space
● Ongoing maintenance
● Potential levy changes
Do not rely on informal advice about the required resolution.
Have the strata manager or appropriate legal adviser confirm the approval pathway before the motion is put to the meeting.
How Can the Owners Corporation Pay for the Battery?
Depending on the project and the building’s financial position, funding may potentially come from:
● Capital works funds
● Special levies
● Other appropriately available strata funds
● Financing arrangements
The committee should compare the battery’s expected financial benefit against the amount each owner will ultimately contribute.
A good owners corporation proposal should show:
Total project cost
minus
BESS3 incentive
plus/minus
Solar project costs and incentives
equals
Net project investment
Then compare that against:
Expected electricity savings + other measurable benefits
This makes the decision easier for owners to understand.
How to Prepare a BESS3 Business Case
A strong strata battery business case should include more than the rebate amount.
1. Measure Current Electricity Consumption
Start with actual electricity bills and interval data.
Look at:
● Common-property electricity usage
● Daytime consumption
● Evening consumption
● Seasonal changes
● Peak demand
● Existing solar generation
2. Determine Solar Potential
Assess:
● Roof area
● Roof condition
● Orientation
● Shading
● Existing panels
● Available electrical capacity
3. Determine the Ideal Battery Size
Do not automatically purchase the maximum 200 kWh battery.
First determine what the building actually needs.
Then calculate how much of that capacity BESS3 will recognise.
4. Calculate the Dwelling Cap
Multiply:
Number of dwellings × 5 kWh
This gives the dwelling-based ceiling for the scheme calculation.
5. Check the Inverter Limit
The battery must also satisfy the applicable inverter relationship.
6. Check the Physical Location
Confirm that an appropriate outdoor installation location exists.
7. Model Solar + Battery vs Battery Only
Compare both options.
The higher solar-plus-battery incentive may make the combined project more attractive, but only if the solar system itself makes financial sense.
BESS3 Example: 10-Apartment Building
Consider a building with:
● 10 dwellings
● 100 kWh usable battery
● 20 kW inverter
● New solar
● Ausgrid network
The incentive calculation begins with three limits:
100 kWh usable battery
50 kWh dwelling limit
80 kWh inverter-related limit
The smallest number is:
50 kWh
That becomes the counted capacity.
Using the illustrative rate and network factor in the supplied example gives:
5,616 certificates
At an illustrative certificate price of $3.00:
$16,848
The important lesson is that buying the additional 50 kWh did not increase the rebate.
That additional capacity must therefore be justified by the building’s actual energy requirements rather than the incentive.
BESS3 Example: 20-Apartment Building
Now take the same 100 kWh usable battery and 20 kW inverter, but place it in a building with 20 dwellings.
The dwelling limit becomes:
20 × 5 kWh = 100 kWh
The three limits are therefore:
● 100 kWh battery capacity
● 100 kWh dwelling cap
● 80 kWh inverter limit
In this example, the inverter-related limit becomes the binding constraint.
This illustrates an important principle:
Adding more apartments does not automatically increase the incentive if another part of the formula becomes the limiting factor.
Should You Install the Maximum 200 kWh Battery?
Not necessarily.
The maximum eligible BESS3 battery size is 200 kWh usable capacity, but the building may not need that much storage.
The right battery size depends on:
● Electricity consumption
● Solar generation
● Peak-demand profile
● Electricity tariffs
● Common-property loads
● Embedded network configuration
● Backup requirements
● Available roof space
● Budget
● Expected savings
The rebate should influence the design, but it should not dictate it.
A battery that is too large can leave the owners corporation paying for capacity that does not generate sufficient additional value.
The Best Way to Compare BESS3 Battery Quotes
Ask every installer to provide the same information.
Battery Information
● Brand and model
● Nominal capacity
● Usable capacity
● Inverter capacity
● Warranty
● Outdoor installation method
BESS3 Information
● Counted battery capacity
● Number of dwellings used
● Assumed certificate rate
● Number of certificates
● Assumed certificate price
● Total incentive
● Whether the project qualifies for the higher solar-plus-battery rate
Solar Information
● Solar system size
● Expected annual generation
● Existing vs new solar
● Solar incentive assumptions
● Expected daytime self-consumption
Financial Information
● Gross project cost
● BESS3 incentive
● Solar incentives
● Net project cost
● Estimated annual electricity savings
● Estimated payback period
Electrical Information
● Network
● Connection requirements
● Switchboard upgrades
● Battery location
● Backup circuits
● Metering arrangements
A quote should make the financial assumptions easy for owners to verify.
Watch the Certificate Price
One of the most important points about BESS3 is that PRCs have market value.
The value is not simply a fixed government cheque.
Certificate prices can change according to market conditions.
That means an installer quoting a specific dollar incentive should clearly identify:
What certificate price has been assumed?
For example, using a $3.00 certificate value produces a different incentive from using $2.77.
The supplied modelling shows that difference clearly.
A stronger quote should therefore show the certificate assumption as a separate line rather than simply presenting one unexplained “rebate” number.
What Should Be Included in the Owners Corporation Meeting Pack?
Before asking owners to vote, prepare a concise but evidence-based proposal.
Include:
1. Current electricity costs
Show what the building spends today.
2. Proposed system
Show the battery size, inverter and solar system.
3. BESS3 incentive
Explain exactly how much capacity is counted and why.
4. Net project cost
Show the amount the owners corporation would actually need to fund.
5. Expected annual savings
Use conservative assumptions.
6. Estimated payback
Show how long the project is expected to take to recover its cost.
7. Battery location
Provide a proposed site plan or photographs.
8. Backup capability
State exactly what will and will not operate during an outage.
9. Warranty
Explain battery and inverter warranty terms.
10. Funding impact
Explain whether the project requires a special levy or use of available capital works funds.
This turns a complicated technical purchase into a decision owners can actually evaluate.
BESS3 and the Federal Battery Incentive
Apartment-building projects should not automatically be treated like individual household battery installations.
A battery installed behind an individual apartment meter is a different type of project and may fall under different incentive rules.
BESS3 is specifically designed around shared apartment-building battery installations. The NSW Government has introduced it because apartment households often face different barriers from standalone homes.
The federal Cheaper Home Batteries Program can interact with some NSW battery incentives, but eligibility depends on the specific installation and program rules. NSW’s position paper notes that BESS3 can be combined with the Commonwealth battery program for eligible batteries under 100 kWh.
Because program rules can change, the final project should be assessed against the current rules at the time of installation.
Important Compliance Requirements
BESS3 eligibility is not just about installing the right-sized battery.
The current NSW requirements include:
● Approved battery products
● Appropriate installer accreditation
● Outdoor installation
● Compliance with applicable Australian standards
● Required planning approvals
● Required network approvals
● Warranty requirements
● Correct evidence and certificate documentation
IPART also requires the customer to receive a BESS3 fact sheet with the quotation through the relevant certificate provider or representative.
A strata committee should therefore be cautious about quotes that show only a battery price and a vague “NSW rebate.”
The proposal should demonstrate how the project meets the scheme requirements.
What Are the Benefits of a Shared Apartment Battery?
The incentive is only one part of the value proposition.
Lower Common-Property Electricity Costs
A battery can store solar electricity and release it later, potentially reducing electricity purchased from the grid.
Better Use of Shared Solar
Without storage, some solar production may be exported when demand is lower.
A battery can allow more of that energy to be used later.
Greater Energy Resilience
Where backup capability is included, nominated essential services may be kept operational during a grid outage.
Better Use of Existing Infrastructure
A shared system can serve multiple apartments and common-property loads rather than requiring separate equipment for each lot.
Potential Property Value Benefit
A more energy-efficient building with solar and battery infrastructure may become more attractive to some buyers and residents, although this should not be assumed as a guaranteed financial return.
What Are the Challenges?
A strata battery is not a simple residential battery scaled up.
The main challenges can include:
Decision-Making
The project requires owners corporation approval.
Physical Space
BESS3 requires an outdoor battery installation.
Electrical Complexity
Apartment buildings can have complicated metering and distribution arrangements.
Capital Cost
Even after the incentive, the project can represent a significant investment.
Fair Allocation of Benefits
Owners need confidence that the savings are being distributed fairly.
Long-Term Ownership
The owners corporation needs to plan for maintenance, warranty claims and eventual replacement.
Network and Planning Approvals
These can affect project timing.
The best way to manage these risks is to identify them before the proposal reaches the general meeting.
What Strata Committees Should Do Now
Because BESS3 begins on 1 September 2026, a committee considering a project should start with the basics.
Step 1: Confirm the Building Classification
Check whether the property is a Class 2 building with at least four dwellings.
Step 2: Check the Electrical Setup
Determine whether the building has:
● Common-property metering
● Embedded network
● Individual apartment meters
● Existing solar
● Existing battery infrastructure
Step 3: Analyse Electricity Consumption
Obtain at least 12 months of electricity data.
Step 4: Assess Roof and Outdoor Battery Space
Do not wait until the final design to find out there is no suitable battery location.
Step 5: Model Solar + Battery
Compare this against battery-only options.
Step 6: Calculate the BESS3 Capacity Limit
Start with:
Dwellings × 5 kWh
Then check the battery and inverter limits.
Step 7: Obtain Comparable Quotes
Use the same specification for each installer.
Step 8: Confirm the Incentive Assumption
Make sure each installer uses a clearly stated PRC value.
Step 9: Prepare the Owners Corporation Motion
Include the full financial and technical business case.
Step 10: Confirm Legal and Strata Requirements
Ask your strata manager or appropriate legal adviser to confirm the approval pathway and resolution wording.
How to Avoid Overpaying for an Apartment Battery
A large rebate can make it tempting to focus only on the discount.
Don’t.
The most important number is:
Net installed cost after incentives
Then ask:
How much value does the battery create each year?
A battery that costs $100,000 and receives a $30,000 incentive is still a $70,000 project.
The rebate does not automatically make the battery financially worthwhile.
Compare the remaining investment against:
● Annual electricity savings
● Solar self-consumption
● Demand reduction benefits
● Backup value
● Maintenance
● Battery degradation
● Expected operating life
The strongest proposal is the one that demonstrates a convincing business case after the incentive, not simply the biggest headline rebate.
Why the Outdoor Rule Could Make or Break the Project
For apartment buildings, this deserves special emphasis.
A committee can spend weeks discussing a 100 kWh battery only to discover that the building has nowhere compliant to install it.
Potential outdoor locations might include:
● Dedicated external battery enclosure
● Suitable external service area
● Other compliant outdoor areas subject to the required planning, fire and electrical considerations
The exact location should be assessed by appropriately qualified professionals.
Check the location first.
It can save the committee from developing a business case around equipment that cannot be installed as proposed.
What Happens After the Battery Is Installed?
BESS3 uses Peak Reduction Certificates.
The scheme is not structured so that the owners corporation simply submits a rebate application and waits for a cheque.
An Accredited Certificate Provider (ACP) or its representative handles the certificate process.
The customer generally sees the incentive reflected in the quote as an upfront discount.
That makes the quotation particularly important.
Ask for the following to be clearly itemised:
● Gross battery cost
● Solar cost, if applicable
● Number of certificates
● Assumed certificate value
● BESS3 discount
● Other incentives
● Net project price
This creates a transparent audit trail for the owners corporation.
Is BESS3 Worth It for Your Apartment Building?
The answer depends on the building.
BESS3 is potentially attractive where the property has:
● Significant common-property electricity consumption
● Suitable outdoor space
● Good solar potential
● Enough apartments to make the battery economics work
● A strong daytime electricity load
● Owners willing to make a long-term infrastructure investment
It may be less attractive where:
● There is no suitable outdoor battery location
● Electricity consumption is very low
● The building has poor solar potential
● Network upgrades are expensive
● The battery would be substantially oversized relative to demand
That is why the right question is not:
“How much rebate can we get?”
It is:
“What battery system creates the best long-term value for our building after the BESS3 incentive?”
The Bottom Line: NSW Apartment Battery Rebate 2026
The introduction of BESS3 from 1 September 2026 gives eligible NSW apartment buildings a new pathway to reduce the cost of shared battery storage.
For strata committees, the opportunity is significant — but the rules need to be understood before the system is sized.
The key points are:
The building needs to be eligible.
The battery needs to be more than 20 kWh and no more than 200 kWh of usable capacity.
The incentive recognises no more than 5 kWh per dwelling, subject to the other scheme limits.
The battery needs to be installed outdoors and meet the relevant technical requirements.
A higher incentive may be available where new solar and battery are installed together within the required timeframe.
Certificate prices can change, so the rebate amount is not a guaranteed fixed payment.
The battery should be sized around the building’s actual energy needs rather than the rebate alone.
For a strata committee, the smartest approach is to start with the building’s electricity data, determine the ideal battery and solar configuration, verify the installation location, and then compare quotes using the same assumptions.
A well-designed project can potentially deliver three benefits at once:
BESS3 incentive + lower electricity costs + greater energy resilience.
The key is to make sure the business case works even after the incentive is separated from the underlying investment.
FAQs — NSW Apartment Battery Rebate and BESS3
1. What is the NSW BESS3 apartment battery rebate?
BESS3 is a new battery incentive under the NSW Peak Demand Reduction Scheme for eligible apartment buildings. It creates Peak Reduction Certificates for qualifying battery installations and is available from 1 September 2026.
2. When does the BESS3 apartment battery rebate start?
BESS3 commences on 1 September 2026. The NSW Government and IPART have confirmed this commencement date.
3. How many apartments are required to qualify for BESS3?
The building must contain at least four individual dwellings and meet the applicable Class 2 apartment-building requirements.
4. What size battery qualifies for the NSW apartment rebate?
BESS3 applies to batteries with combined usable capacity greater than 20 kWh and up to 200 kWh, subject to the other eligibility requirements.
5. How much battery capacity does BESS3 count per apartment?
The scheme applies a cap of 5 kWh of counted battery capacity per dwelling, subject to the other limits involving usable battery capacity and inverter output.
6. Does an apartment building need solar to receive BESS3?
No. A battery-only project can qualify, provided the other requirements are met. However, a higher incentive rate can apply where qualifying new solar is installed with the battery within the required timeframe.
7. Can an existing apartment solar system qualify for the higher BESS3 rate?
Not automatically. The higher rate is associated with qualifying new solar installed within the required timeframe before or alongside the battery. An existing array on its own does not create the same eligibility for the higher rate.
8. Does the battery have to be installed outdoors?
Yes. Current BESS3 requirements specify outdoor installation in accordance with the applicable requirements and standards.
9. Can a BESS3 battery provide backup power during a blackout?
It can if the system is designed and configured for backup. However, BESS3 eligibility itself should not be confused with a requirement that the battery provide whole-building backup. The installer should specify exactly which circuits and services will operate during an outage.
10. How much is the NSW apartment battery rebate worth?
There is no
