From 1 September 2026, the NSW Peak Demand Reduction Scheme covers commercial and industrial batteries for the first time. Two new activities, BESS4 and BESS5, sit alongside the existing home battery activity and put a genuine incentive behind the kind of storage that businesses actually install.
If you operate a site in NSW and you have been running the numbers on a battery, the numbers just changed.
The Peak Demand Reduction Scheme is not a rebate cheque from the government. It is a certificate scheme, and understanding that difference matters when you are reading a quote.
NSW sets an annual target for reducing electricity demand during the peak window, the late afternoon and early evening on the hottest summer days, when the grid is under the most pressure. Electricity retailers are obliged to meet a share of that target. They meet it by surrendering Peak Reduction Certificates, or PRCs.
Certificates are created when someone installs equipment that measurably reduces demand in that window. A battery that discharges at 5pm on a 40 degree day is doing exactly what the scheme is designed to buy. The certificates it creates get sold, and the value is passed back to you as a discount on the project.
So the scheme is not paying you for owning a battery. It is paying you for being useful to the grid at the moment the grid needs it most.
The battery activities under the scheme now run from BESS1 through BESS5. Here is where each one sits as at August 2026:
BESS4 and BESS5 are the new ground. Until now, a business installing storage in NSW had federal certificates available for small systems and essentially nothing at commercial scale. That gap is now closed.
There is no fixed dollar figure per kilowatt-hour, and anyone quoting you one has rounded off something important.
The certificate count is driven by a demand shifting component, multiplied by a scheme factor and by your network loss factor. Network loss factors differ by distributor: Ausgrid sits at 1.04, Endeavour Energy and Essential Energy at 1.05. Usable capacity is treated as 90 percent of nominal capacity.
The certificates are then worth whatever PRCs are trading at. As at August 2026 that is around $3.00 per certificate, and it floats with the market.
What this means in practice: two batteries with identical headline capacity can generate materially different incentives depending on inverter sizing, system configuration, and whether new solar goes in alongside. The design decides the number, not the datasheet.
On published worked examples, the scale is meaningful. A 100 kWh business battery paired with 100 kW of new solar has been modelled at roughly a 26 percent reduction in project cost. A 5 MWh standalone commercial system has been modelled at roughly 36 percent. Treat those as indicative of the order of magnitude, not as a quote for your site.
Both BESS4 and BESS5 pay more when new solar is installed within 90 days of the battery, provided the new solar to battery ratio is better than 1 kW per 4 kWh.
Solar is not mandatory. But if you were already planning to add generation, doing it in the same window rather than a year later is worth real money.
For BESS4: the site must be an eligible NSW business site, the battery must be on the Clean Energy Council approved product list, the installer must be registered with Solar Accreditation Australia, and the installation must comply with AS/NZS 5139. Residential buildings and data centres are excluded.
For BESS5: the system must be internet connectable and controllable by a demand response aggregator, the equipment must be tested to UL9540A, and the work must be completed by licensed professionals. Residential buildings and data centres are excluded here too.
One more condition worth noting: a site can only claim BESS4 or BESS5 once. This is not an incentive you can stage across multiple phases of the same project, so the sizing decision you make at the start carries more weight than usual.
The incentive is not the business case. It sits on top of the business case.
A commercial battery in NSW earns its keep primarily by cutting demand charges, the component of your bill set by your single highest half hour of consumption in the billing period. That saving repeats every month, for the life of the asset. The PDRS incentive is a one time reduction in what you pay to install it.
Put another way: the certificates shorten the payback. The way the battery is operated determines the payback. Both matter, and only one of them is still working for you in year seven.
This is where the operating strategy earns its money. Across Ampaura sites, AI Mode delivers at least 20 percent more savings than standard control strategies, with real world examples as high as 46 percent, measured against a documented baseline rather than modelled. On a ten year asset, that difference is larger than the incentive.
If a battery is already on your capital plan for this financial year, the sequencing now matters. Systems must be installed on or after 1 September 2026 to be eligible, so a project completed in August misses out entirely.
If you are earlier in the process, the useful next step is a look at your actual interval data. It tells you what your demand peaks look like, how often they occur, and what size of system is worth installing. That analysis is what turns an incentive into a decision.
Talk to the Ampaura team about what BESS4 or BESS5 could mean for your site, or read more about how batteries cut peak demand charges.
Scheme structure, activity definitions, capacity bands and start dates are as published for the NSW Peak Demand Reduction Scheme and current as at August 2026. Certificate pricing floats and was around $3.00 per PRC at the time of writing. Worked examples are published third party models, quoted here as an indication of scale only. Scheme rules change; confirm current requirements before committing to a project.