What the rebate takes off a Powerwall
The federal battery discount comes off your invoice on the day you buy, and there is nothing to claim back afterwards. The table below works it out for one, two, three and four Powerwalls.
Premium Tesla Powerwall Certified Installer since 2021

Solar battery rebate
The Cheaper Home Batteries discount, worked out for one, two, three and four Powerwalls. Only an accredited retailer can take it off the price, and we are one. Your address does not change any of these figures.
| Units | Usable storage | Federal discount | Added by this step |
|---|---|---|---|
| 13.5 kWh | $3,276 | Full rate | |
Most popular![]() ![]() | 27 kWh | $5,328 | +$2,052 |
![]() ![]() ![]() | 40.5 kWh | $5,940 | +$612 |
![]() ![]() ![]() ![]() | 54 kWh | $6,264 | +$324 |
Rates as at 29 July 2026 · Clean Energy Regulator · installs to 31 December 2026
One Powerwall, or two?
The discount is worked out on how much usable storage you put in, so the size of the battery decides the size of the discount. What decides the size of the battery is your house: what it draws after dark, whether there is a car in the driveway, how much of the roof is already working.

Most Canberra houses we quote land on one
One Powerwall 3 holds 13.5 kWh usable, which carries the evening and the night in a house that is not also charging a car. The top row of the table is the whole federal discount on it, and there is nothing else federal to add. How the federal discount works covers what qualifies a household and how the money reaches your quote.
Already have a Powerwall 3? Add an Expansion Pack
An Expansion Pack adds storage behind a Powerwall 3's own inverter, and the second row of the table is what comes off one. We check that the unit on your wall takes one before you are quoted for it. Read the Expansion Pack in full for the sizes and the fitting.
More than 900 Powerwalls, already on Canberra walls
The discount above is the same figure whoever fits your battery. What changes is the switchboard check, the network application and the certificate paperwork, and we carry all three.
- 2021Tesla Premium Installer since
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Canberra, or Wollongong?
The figures above are federal. They are the same on both sides of the border, and they are the whole federal answer. What each government puts beside them is not the same, so start with the one that covers your address.
Australian Capital Territory
If the house is in Canberra
The ACT runs a loan scheme of its own for households putting in solar and storage. The page sets out what it costs to borrow and who can have it.
New South Wales
If the house is in Wollongong, or anywhere in NSW
NSW runs a scheme of its own, on its own terms. The page sets out what the loan is, who can have it and how to apply.

Every installation backed by the Sunstak guarantee
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Our master installers have completed at least 100 installations with 5/5 star reviews.
Installation with no surprises
We confirm the scope, price and installation plan. You'll know exactly what's included, what happens next and what to expect on the day, with no last-minute variations or surprises.
Roof leak guarantee
If your roof leaks after our installation, we pay you $500 cash and fix it immediately.
Stock guarantee
If the product on your design cannot be supplied, the replacement is an upgrade and the price does not move.
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