What Happens to the Battery Rebate in December 2026?

Understanding the Next STC Changes

If you're considering installing a home battery, you've probably heard that the federal battery rebate changed earlier this year.

What many people don't realise is that the rebate changes again in December 2026.

Unlike the May changes, which introduced a new tiered rebate structure, the December adjustment is part of an ongoing reduction in the number of Small-scale Technology Certificates (STCs) available for eligible battery systems.

Here's what that means, and why it shouldn't necessarily change your decision to install a battery.

How Does the Federal Battery Rebate Work?

Australia's Cheaper Home Batteries Program reduces the upfront cost of eligible battery systems through the Small-scale Renewable Energy Scheme (SRES).

Rather than receiving a cash payment, eligible battery systems create Small-scale Technology Certificates (STCs). These certificates are usually assigned to your installer, who applies their value as an upfront discount on your installation.

The number of STCs your battery receives depends on two things:

• Your battery's usable capacity
• The STC Factor that applies on the day your battery is commissioned

The important point is this:

The STC Factor reduces over time, meaning future installations receive fewer certificates than those installed today.

What Changes in December 2026?

When the battery rebate was expanded, the Australian Government also changed how the STC Factor works.

Instead of reducing once each year, the STC Factor now reduces every six months.

The next scheduled reduction occurs in December 2026.

While the rebate remains available, each reduction means fewer STCs are generated for the same battery system, resulting in a smaller upfront discount.

In simple terms:

• July–November 2026 installations receive the current STC Factor.
• From December 2026, that factor reduces again.
• The same battery installed after the reduction will generally attract a smaller rebate.

You can read a full breakdown of the STC factor here: https://www.dcceew.gov.au/energy/programs/cheaper-home-batteries

The Tiered STC Structure Still Applies

The tiered battery rebate introduced earlier this year doesn't change in December.

It continues to apply as follows:

This means the largest rebates are still available on the first 14 kWh of usable battery capacity, with reduced support applying to larger systems.

Why Did the Government Change the STC Structure?

The original battery incentive encouraged many households to install very large battery systems.

While these systems suited some applications, the Government wanted to ensure the program remained financially sustainable while still helping the majority of Australian households.

The revised STC structure aims to:

• maintain an incentive of around 30% across common battery sizes
• encourage batteries that are appropriately sized for each property
• support more battery installations over the life of the program as battery prices continue to fall.

Should You Rush to Install Before December?

It's a question we're hearing more often.

The answer is not necessarily.

Yes, the rebate available in December will be slightly lower than it is today. However, the rebate is only one part of the equation. Choosing the right battery size, ensuring it integrates properly with your solar system, and designing it around how you actually use electricity will almost always have a greater impact on long-term value than a modest change in rebate.

Installing the wrong battery simply to secure a slightly higher rebate rarely delivers the best outcome.

At Buffalo SPS, We Design Systems Around People, Not Rebates

Government incentives are helpful, but they shouldn't dictate your entire energy strategy.

At Buffalo Stand-alone Power Solutions, we design systems that consider:

• your daily energy consumption
• future plans such as electric vehicles or electrification
• backup power requirements
• energy resilience during outages
• long-term return on investment

The rebate is simply one piece of the puzzle.

Our goal is to help customers invest in systems that will continue delivering value long after today's incentive has finished.

The Bottom Line

The next change to Australia's battery rebate arrives in December 2026, when the STC Factor reduces again as part of the Government's planned six-monthly schedule.

While this means a slightly smaller upfront rebate for future installations, batteries remain one of the most effective ways to increase solar self-consumption, improve energy resilience and reduce reliance on the grid.

The best time to install isn't determined solely by the rebate, it's determined by whether the system is right for your home or business.

If you're considering battery storage and want to understand how the December changes affect your project, the team at Buffalo Stand-alone Power Solutions can help you design a solution that delivers value for years to come.