STC Rebate in NSW for 2026: Solar & Battery Incentives Explained

The cost of installing solar panels in Australia has dropped significantly over the past decade, largely due to government incentives. One of the most important incentives available to homeowners and businesses is the Small-scale Technology Certificate, also known as the STC rebate.For residents in New South Wales (NSW), the STC scheme provides a substantial discount on the upfront cost of solar installations. By generating certificates based on the expected energy output of a renewable energy system, the scheme allows solar installers to offer immediate savings on solar panel systems.In 2026, the STC rebate remains the largest solar incentive available across Australia, helping thousands of households switch to renewable energy and reduce electricity costs. This guide explains how the STC rebate in NSW works, how much you can save, eligibility requirements, and how to claim the incentive for solar panels and battery storage.

What Are Small-Scale Technology Certificates (STCs)?

STCs are tradeable certificates issued by the Australian Government as part of the Small-scale Renewable Energy Scheme (SRES). When you install an eligible renewable energy system — solar panels, a battery, a solar water heater, or a heat pump — you earn a set number of certificates based on how much energy your system is expected to generate or displace.One STC = one megawatt-hour (MWh) of renewable electricity generated or displaced. Each certificate carries a capped market value of $40 (excl. GST), set by the federal government.Rather than claiming the money yourself, most NSW residents assign their STCs to a CEC-accredited installer, who passes the value on as an upfront discount off your system price. No paperwork, no waiting — it’s built into your quote.

How STC Values Are Calculated

STC values fluctuate based on market supply and demand, as well as the scheme’s annual step-down. Each year, the number of STCs a system can create decreases slightly, meaning rebate values reduce over time. For this reason, installing solar sooner generally provides better rebate outcomes.The number of Small-scale Technology Certificates (STCs) for a solar system is calculated using this formula:Number of STCs = Postcode Zone Rating × Deeming Period (years remaining until 2030) × System Size (kW).To estimate the total STC rebate, you simply multiply the number of STCs by the current price of each certificate:STC Rebate = Total STCs × Price per STC.For example, if you install a 6.6kW solar system in Sydney (Zone 3), the zone rating is 1.382, and the remaining deeming period is 5 years (2026-2030). Using the formula: 1.382 × 5 × 6.6 = approximately 46 STCs.If the current market value of one STC is $40, the estimated rebate would be: 46 × $40 = $1,840.So, a 6.6kW solar system in Sydney could receive around $1,840 in STC rebates, which helps reduce the upfront cost of installing solar panels.

Solar Zone 3 (Average Sunlight) Solar Zone factor of 1.382
System size	Amount of STC’s	STC Price	STC Incentive
8.8 kW	61	$40	$2,440
10.56 kW	73	$40	$2,920
13.2 kW	91	$40	$3640
19.3 kW	133	$40	$5,320

These rebates can significantly reduce installation costs, making solar systems far more affordable for Australian households.However, the STC scheme gradually decreases each year and is expected to phase out by 2030, which means the rebate amount will continue to decline over time.

The Deeming Period in 2026: Why Timing Matters More Than Ever

The number of STCs your system earns is primarily driven by the “deeming period” — the number of years remaining until the scheme ends on 31 December 2030.As of 1 January 2026, the deeming period is 5 years — down from 6 years in 2025, representing an immediate 16.6% reduction in your STC entitlement compared to last year.This is not a one-time adjustment. Each year on 1 January, the deeming period drops by another year, and so does your rebate. By 2027, it will be 4 years. By 2028, just 3. The scheme doesn’t renew.

Year	Deeming Period	STC Impact	Action
2026	5 years	16.6% less than 2025	Act now
2027	4 years	20% less than 2026	Reduced savings
2028	3 years	25% less than 2027	Further reduced
2029	2 years	33% less than 2028	Minimal value
2030	Phase-out	Scheme ends Dec 31	No rebate

Factors That Affect the STC Rebate Amount

Several factors determine how many STCs your solar system generates.

Solar System Size

The larger your solar system, the more electricity it produces and the more STCs it generates.For example:

A 6.6kW solar system typically generates around 45–47 STCs
A 10kW solar system may generate 70 or more STCs

Installation Location

Australia is divided into different solar zones based on sunlight levels. Regions with more sunlight generate more STCs.Most areas in New South Wales fall under Solar Zone 3, which provides strong certificate generation compared with other parts of the country.

Year of Installation

The STC scheme uses a “deeming period,” which decreases every year until the program ends in 2030.This means systems installed earlier receive more certificates than systems installed later, making early adoption more beneficial.

How Much Is the STC Rebate in NSW in 2026?

The value of STCs fluctuates depending on market demand but generally ranges between $35 and $40 per certificate.The total rebate amount depends mainly on the size of your solar system. Larger systems generate more certificates because they produce more electricity.Below are approximate rebate estimates for common solar system sizes in NSW.

Solar System Size	Estimated STC Rebate
5kW Solar System	~ $1,080
6.6kW Solar System	~$1,500 – $1,800
10kW Solar System	~$2160

Major Change: The Cheaper Home Batteries Program in 2026

One of the biggest solar incentive developments in recent years is the extension of STC-style rebates to home battery systems for the first time. The program launched on 1 July 2025 and is fully active in NSW in 2026 — but with a major structural change kicking in from 1 May 2026.

Before 1 May 2026 (Higher Rate)

Batteries installed before 1 May 2026 benefit from the highest rebate available under this program. The STC factor is calculated at the full rate, with no tapering based on battery size. For a standard 10kWh home battery, this can translate to approximately $3,000 in upfront savings.

From 1 May 2026 (Tiered Tapering Applies)

From 1 May 2026, a new tiered framework applies to all battery STC calculations:

0–14 kWh of usable capacity: 100% of the STC rate (full rebate)
14–28 kWh: Only 60% of the STC rate applies to capacity above 14 kWh
28–50 kWh: Only 15% of the STC rate applies to capacity above 28 kWh

This means smaller batteries (under 14 kWh) — which covers the majority of residential systems — retain their full rebate. Larger systems take a significant hit on the additional capacity. The STC factor also reduces more frequently from this date, moving from annual to bi-annual adjustments.From 1 July 2025, the Australian Government introduced the Cheaper Home Batteries Program. From January – April 2026, the rebate value is $336 per usable kWh of battery capacity, and from May – December 2026, this value will be $272 per usable kWh of battery capacity. It gradually decreases each year. Here is an overview of the changes to the Federal Cheaper Home Batteries Rebate in Australia after 1 May 2026 :

Year From	Period of time	STC Factor (Before Change)	Proposed STC Factor (Already Executed)	Price per STC	Total STC Rebate (per usable kWh) = STC Factor × Price per STC
2026	Jan – Apr	8.4	8.4	$40	$336
2026	May – Dec	8.4	6.8	$40	$272
2027	Jan – Jun	7.4	5.7	$40	$228
2027	Jul – Dec	7.4	5.2	$40	$208
2028	Jan – Jun	6.5	4.6	$40	$184
2028	Jul – Dec	6.5	4.1	$40	$164
2029	Jan – Jun	5.6	3.6	$40	$144
2029	Jul – Dec	5.6	3.1	$40	$124
2030	Jul – Dec	4.7	2.6	$40	$104
2030	Jul – Dec	4.7	2.1	$40	$84

NSW Battery Incentive: Virtual Power Plant (VPP) Program

On top of the federal battery rebate, NSW homeowners with a new battery can access the state’s Virtual Power Plant (VPP) incentive. This program rewards households for connecting their battery to the grid during peak demand periods — helping stabilise the NSW electricity network while putting money back in your pocket.The incentive value is based on your battery’s usable capacity, and scales as follows:

5 kWh battery: ~$275 incentive
10 kWh battery: ~$550
20 kWh battery: ~$1,100
27+ kWh battery: Capped at $1,500

To qualify, your battery must be VPP-capable with active firmware that supports API communication with the grid. The standard “self-consumption only” mode does not qualify. The VPP incentive can be stacked directly on top of your federal STC discount.

Advantages of Solar Rebate in NSW, Sydney

Solar rebates in New South Wales make switching to solar energy more affordable and financially rewarding for homeowners. These government-backed incentives are designed to reduce installation costs and encourage the adoption of clean energy. Here are the five biggest advantages:

1. Lower Upfront Installation Costs

Solar rebate programs significantly reduce the upfront cost of installing a solar power system. This enables more households to access renewable energy without the burden of high upfront costs.

2. Reduced Electricity Bills

Generating your own solar power means you rely less on grid electricity. As a result, households can enjoy substantial long-term savings on their energy bills year after year.

3. Earn Credits from Excess Power

If your system produces more electricity than you use, the extra power can be sent back to the grid. Energy providers offer credits for this exported electricity, creating an additional financial benefit.

4. Incentives for Solar Battery Storage

NSW rebate schemes also support battery installation, making it more affordable to store unused solar energy. Stored power can be used at night or during peak-rate periods, increasing savings and energy independence.

5. Increased Property Value

Homes equipped with solar energy systems are more attractive to buyers. Lower running costs and improved energy efficiency can boost resale value and help properties sell faster.

How to Claim Your STC Rebate in NSW 2026: Step-by-Step

Get quotes from CEC-accredited installers only — unaccredited installers cannot create valid STCs.
Check the approved products list — your panels, inverter, and battery must appear on the Clean Energy Council’s approved list.
Assign your STCs to the installer — this gives them permission to claim the certificates and pass the discount to you upfront.
Installer submits the STC claim to the REC Registry — validation typically takes 4–6 weeks, but your discount is instant at the point of sale.
Apply for the NSW VPP incentive separately — your installer or VPP aggregator will guide you through connecting your battery to the program.

Frequently Asked Questions on STC Rebate in NSW

Is the STC rebate in NSW ending soon?

Not yet, but it is winding down. The SRES scheme closes on 31 December 2030. Each year until then, your entitlement decreases as the deeming period shortens. NSW residents who install solar in 2026 still receive a strong upfront discount, but waiting will cost you hundreds to thousands of dollars.

Can I get STCs if I already have solar panels?

Generally, no STCs are available only for new system installations. However, if you’re adding a battery to an existing solar system, you may be eligible for battery STCs under the Cheaper Home Batteries Program. Check with a CEC-accredited installer to confirm eligibility.

Does NSW have its own solar panel rebate in 2026?

No. NSW does not have a state-specific solar panel rebate in 2026. Upfront solar discounts are delivered entirely through the federal STC scheme. However, NSW does offer the VPP battery incentive and the Solar for Apartments program for strata buildings.

What is the STC price per certificate in 2026?

The federal government caps the STC clearing house price at $40 per certificate (excl. GST). In practice, open market prices fluctuate, and most installers quote based on a slightly lower rate of around $38–$40.

What’s changing for batteries on 1 May 2026?

From 1 May 2026, the Cheaper Home Batteries Program introduces capacity tapering: the full STC rate applies only to the first 14 kWh of usable battery capacity. Additional capacity above 14 kWh and 28 kWh attracts reduced rates of 60% and 15%, respectively. The STC factor also begins declining more frequently, shifting from annual to bi-annual adjustments.

Final Verdict: Should You Go Solar in NSW in 2026?

The numbers are clear. The combination of federal STCs, the Cheaper Home Batteries Program, and NSW’s VPP incentive makes 2026 one of the best windows remaining to invest in solar and battery storage — but the window is tightening. Every year you wait, the rebate shrinks. For batteries specifically, acting before 1 May 2026 secures the highest available discount before the tapering rules kick in.With electricity prices remaining high across NSW and solar system costs continuing to fall, the payback period on a well-designed solar and battery system in 2026 is typically 5–7 years — often less for households with time-of-use tariffs.Ready to find out exactly what you’re entitled to? Request a free quote from a CEC-accredited installer today, and make sure your system is designed to capture the maximum available rebate before the next step-down.This article is for informational purposes. STC values and program rules are subject to change. Always verify current rates and eligibility with a CEC-accredited installer or the Clean Energy Regulator.