Thinking about a commercial solar battery for your NSW business? The timing is good. From 1 September 2026, the NSW Government is widening its Peak Demand Reduction Scheme (PDRS). It will now cover commercial-scale batteries for the first time. Two new activities make this possible: BESS4 and BESS5. In this guide, we’ll walk through how the rebate works. We’ll cover who can claim it and what to check before you commit.
What is the Peak Demand Reduction Scheme?
The Peak Demand Reduction Scheme is part of the NSW Energy Security Safeguard. It’s a state program that rewards cutting power use at peak times. Businesses and households can both take part. Rather than handing out a flat rebate, the scheme creates certificates. These are called Peak Reduction Certificates, or PRCs. They trade on the open market, so their value moves around. It doesn’t stay fixed. As of August 2026, a PRC was worth around $3.00. That price isn’t guaranteed. It will shift as demand changes.
BESS4 and BESS5: the new battery activities
Until now, the scheme only covered smaller residential batteries. From 1 September 2026, two new activities bring bigger systems into the fold:
- BESS4 covers small and medium business batteries, with usable capacity above 20kWh and up to 200kWh.
- BESS5 covers larger commercial, industrial and community batteries, from above 200kWh up to 30MWh.
Usable capacity, not nameplate capacity, is what counts here. The scheme works this out as 90% of a battery’s nominal size. There’s also a separate activity, BESS3, for apartment buildings. That’s a topic for another day.
Who can claim the rebate?
A few conditions apply across both activities. The site can’t be residential. It also can’t be a data centre. On top of that, it can’t have already received a BESS4 or BESS5 incentive before. Planning approval needs to be sorted before installation begins. And installation itself has to happen on or after 1 September 2026.
For BESS4, the equipment needs to be on the Clean Energy Council’s approved list. Installation must be done by an accredited provider. That installer needs to work to the relevant Australian Standard. BESS5 systems, given their size, need to pass a recognised fire-safety test instead. Both activities cap battery duration at six hours. And if you install new solar alongside the battery, a higher rate kicks in.
What the rebate is worth
Because PRCs trade on an open market, there’s no single dollar figure for every project. That said, published NSW Government guidance is a useful guide. It suggests the incentive can cover a decent chunk of the upfront cost, generally somewhere between 20% and 40%. Batteries installed on their own tend to sit toward the lower end of that range, while batteries paired with new solar can reach the higher end. The actual value depends on a few things. These include your battery size, whether you’re adding solar too, and the certificate price on installation day. So, treat any figure you see as a guide, not a guarantee. Always check current pricing before you commit.
To give you a sense of scale, it helps to look at a rough example. Say a 100kWh battery costs somewhere around $80,000 to install. At a 20% discount, that’s a saving of about $16,000. Push that up to 40% with a solar-linked system, and the savings climb closer to $32,000. Larger commercial or industrial batteries, running into the hundreds of kilowatt-hours or beyond, can see savings stretch well into six figures. Payback periods generally sit around two to four years. Your own numbers will depend on your site.
Getting a bigger discount by adding solar
If you pair the battery with new solar, the incentive steps up. To qualify for the higher rate, the solar needs to go in within 90 days of the battery installation, either before or after. There’s also a minimum solar size to meet. You’ll need at least 0.25kW of new or additional solar capacity for every 1kWh of usable battery capacity. So, a 100kWh battery would need at least 25kW of new solar alongside it. Get that timing and sizing right, and the higher end of the discount range becomes available to you.
A word on virtual power plants
Separately, the NSW Government is also expanding its Virtual Power Plant (VPP) incentive to include batteries up to 50kWh. Small businesses that join a VPP with an eligible battery can access an incentive worth up to $1,000. It’s a smaller program than the PDRS battery incentive, but worth knowing about if your battery falls in that size range, since it can be claimed on top.
How this fits with broader solar policy
The NSW battery rebate lands alongside some big changes at the federal level too. In August 2026, Climate Change and Energy Minister Chris Bowen announced that the Small-scale Renewable Energy Scheme would expand to cover solar installations up to one megawatt, up from the previous 100-kilowatt limit. That scheme covers solar panels, not batteries. Even so, it’s expected to bring real savings. Installation costs for commercial, industrial and agricultural rooftops could fall by about 20 per cent. The NSW Government has confirmed the battery incentive can be combined with this federal solar support. Together, the two schemes give NSW businesses two separate ways to cut costs. One covers the solar. The other covers the storage.
Getting started
Before you commit to anything, check eligibility against the current PDRS rules. These can change over time. It also pays to confirm your proposed battery and installer meet the relevant standards. Equipment that doesn’t comply won’t generate any certificates.
Compare Quotes and Confirm the Details
For the most current details on eligibility and rule changes, head to NSW Government’s Energy Security Safeguard. This is kept up to date as the scheme evolves.
So much comes down to your specific site. Battery size, installer accreditation, your network area, and whether you’re adding solar all play a part. Because of that, the best way forward is simple. Compare quotes from a few accredited installers before you decide on anything. A good quote will spell out the expected certificate value, the equipment on offer, and a realistic payback period for your site. That way, you’re working with real numbers, not guesswork. It also lets you see how providers compare on price, equipment and service, rather than relying on just one quote. The quickest way to know what a commercial battery will really cost, and really save, is to line up a few quotes and compare them.