If your home battery isn’t commissioned by 31 December 2026, your federal rebate falls by about 16%. That is roughly $440 on a 10 kWh battery, $600 on 13.5 kWh, and up to about $1,100 on the largest eligible systems. The rebate isn’t ending, but it steps down again on 1 July 2027, so waiting until mid-year costs even more.
This is the follow-up to our guide to the January rebate change, which explains how the rebate works. This post is about the clock: what each date costs, and how to work back from 31 December. With about nine weeks left from 27 October, a decision this week keeps your options open.
What changes on 1 January, and again in July?
The certificate factor falls from 6.8 to 5.7 per kWh on 1 January, then to 5.2 on 1 July. That is about 16% less rebate in January and about 24% less by July, as set out in the explanatory statement to the 2026 regulations. At $40 a certificate, the first 14 kWh of your battery drops from about $272 per kWh to $228, then to $208.
Installing solar and a battery together? The solar rebate also steps down on 1 January. The scheme’s deeming period shortens from five years to four, which cuts the solar certificates by about 20%.
How much does waiting cost?
Waiting until January costs about $440 on a 10 kWh battery. Waiting until July costs about $640. The table shows the rebate by battery size and install date, and what you give up by waiting.
Will battery prices rise on 1 January too?
They might, and it would land on top of the smaller rebate. China’s export VAT rebate on batteries fell from 6% to 0% on 1 January 2027, according to HSF Kramer. SolarQuotes estimates wholesale battery prices could rise about 6% from the start of 2027 if manufacturers pass the full cost on. In its example, a battery listed at about $6,720 after the federal rebate could cost around $600 more.
Pass-through isn’t guaranteed, and retail prices also depend on competition and supply. Treat it as a risk, not a forecast. If you were going to buy a battery anyway, installing before 1 January avoids both changes.
Which date counts: signing or installing?
The installation date counts, not the day you sign or pay a deposit. The Clean Energy Regulator says rebates depend on when the battery is installed, with no exceptions, because the date is set in legislation. In practice that means the day the battery is installed, tested and proven to charge and discharge.
So a contract signed in December does not lock in the higher rate if the install slips into January. Before you sign, ask your installer in writing what happens to your price if the install date moves past 31 December.
Is the battery rebate ending on 1 January?
No. The rebate drops on 1 January 2027, and the program runs to the end of 2030. The scheduled step-downs fall on 1 January and 1 July only. If someone tells you the rebate “ends” or “closes” on another date, treat that as a red flag and ask them to show you the calculation.
The government reviews the program settings at least once a year, so further changes are possible. For Victorian households this federal discount is also the main battery incentive, because Victoria’s own battery loan is no longer taking new applications.
The honest case for acting now is simple. Each step-down is permanent, so the money you lose on 1 January does not come back.
What should the timeline look like between now and 31 December?
Aim to have your install date confirmed by mid-November and the battery commissioned by mid-December. That leaves a buffer so a delay doesn’t push you past 31 December.
Now to early November: get your quote and book a site assessment. Check that the quote shows the battery’s usable kWh and how the rebate was calculated.
By mid-November: accept the quote and get your installation date in writing.
Late November to early December: your installer orders equipment and handles the paperwork. Confirm the battery is in stock.
By mid-December: installation and commissioning. This leaves about two weeks spare for weather, supply or inspection delays.
31 December: the last day to be commissioned at the higher rate.
The Christmas break removes working days, and the Clean Energy Regulator limits how many installs one installer can complete in a day. Late-December slots are limited, so don’t leave it to the last week.
Should you rush to beat the date?
Yes, if you were already planning a battery and can get a confirmed install slot. No, if it means a hurried job. The saving is real, but it is a few percent of the total job cost. A well-installed battery at the lower rate is a better result than a rushed one at the higher rate.
The Clean Energy Regulator has urged installers not to rush jobs to beat a rebate deadline, and says safety comes first. A good installer will tell you honestly whether your date is achievable. If they can’t confirm one, ask what the price looks like on the January rate.
What should you do this week?
Do these three things this week.
Request a quote that shows your rebate at today’s rate and at the January rate, side by side.
Get an install date in writing, and ask what happens to the price if it slips past 31 December.
Check your battery size and eligibility using the checklist in our guide.
How Sunrise Approaches This
We tell customers the real dates and the real dollars. The rebate drops on 1 January, it doesn’t end, and the date that counts is the day your battery is commissioned.
Sunrise Innovations has completed 23,109+ energy installations across Victoria. We hold a 4.9-star rating across 516+ verified Google reviews and a 97% “right first time” installation rate. We are Solar Accreditation Australia (SAA) accredited with a battery endorsement, and our Director, Paul Dodds, is CEC-accredited.
If you want the higher rebate, the next step is a quote and a confirmed install date. Request your Sunrise battery quote this week.
