Tesla Powerwall 3 is a home battery with a built-in solar inverter: 13.5 kWh usable, up to 11.04 kW of continuous power per unit, and room for up to three Powerwall 3 Expansion units.
Tesla Powerwall 3: specs and warranty
| Spec | Value | Source |
|---|---|---|
| Category | Home battery | n/a |
| Headquarters | USA | n/a |
| Usable capacity | 13.5 kWh per Powerwall 3 | Tesla, Powerwall 3 datasheet (Australia) |
| Expansion | Up to 3 Powerwall 3 Expansion units (13.5 kWh nominal each), 54 kWh in total | Tesla, Powerwall 3 datasheet (Australia) |
| Continuous power | Up to 11.04 kW AC per unit (configurable 5, 10 or 11.04 kW) | Tesla, Powerwall 3 datasheet (Australia) |
| Solar inverter | Built in: up to 20 kW DC of solar, 3 MPPTs | Tesla, Powerwall 3 datasheet (Australia) |
| Warranty | 10 years | Tesla, Powerwall 3 datasheet (Australia) |
How much does the Tesla Powerwall 3 cost in 2026?
| Installed price, before rebates (gross) | $16,702-$17,251 |
| Federal Cheaper Home Batteries rebate now | −$3,608 (91 STCs on 13.5 kWh usable, CER) |
| After the federal rebate (net) | $13,094-$13,643 |
Price source: Solar Choice, average installed cost of popular batteries (incl. federal rebate). The price includes the built-in inverter. The battery factor steps down to 5.7 STCs per kWh on 1 January 2027, which cuts the rebate on this battery by about $595. NSW and WA households may stack a state incentive on top: see the battery rebate by state.
Federal rebate by Tesla Powerwall 3 size
| Configuration | Usable kWh | STCs | Rebate now | From 1 January 2027 |
|---|---|---|---|---|
| Powerwall 3 | 13.5 | 91 | $3,608 | $3,013 |
| Powerwall 3 + 1 Expansion | 27 | 148 | $5,868 | $4,917 |
| Powerwall 3 + 2 Expansions | 40.5 | 165 | $6,542 | $5,472 |
| Powerwall 3 + 3 Expansions | 54 | 174 | $6,899 | $5,789 |
Capacities from Tesla, Powerwall 3 datasheet (Australia). Tesla quotes Expansion units at 13.5 kWh nominal; the rebate is paid on usable capacity, so confirm the usable figure on your quote. The rebate pays 6.8 STCs per usable kWh on the first 14 kWh, 60% of that from 14 to 28 kWh and 15% from 28 to 50 kWh (Clean Energy Regulator, Solar batteries), valued here at a $39.65 STC price. These are rebate amounts only, not installed prices.
VPPs that list Tesla
| Program | Models, as the operator lists them | Type | Status |
|---|---|---|---|
| AGL Virtual Power Plant | Powerwall 2, Powerwall 3 | Battery VPP | Open to new customers |
| Amber SmartShift | Powerwall 2, Powerwall 3 | Wholesale-price battery trading | Open to new customers |
| ENGIE VPP (Battery Sharing Rewards Network) | Powerwall | Battery VPP | Open to new customers |
| ActewAGL VPP | Powerwall 2, Powerwall 3 | Battery VPP | Open to new customers |
Lists change often, so check the operator's own list for your exact model. Every program's list is in the VPP battery compatibility table.
Key features
- Built-in solar inverter, taking up to 20 kW DC of solar on 3 MPPTs, so no separate hybrid inverter
- Up to 11.04 kW AC continuous output per unit
- Up to three Powerwall 3 Expansion units behind one Powerwall 3, 54 kWh in total
Things to check before you buy
- Capacity grows in 13.5 kWh steps only
- With Expansion units fitted, continuous charging is limited to 5 kW
- Single-phase unit: three-phase homes need a design check with the installer
Who it suits
Homes that want the battery, solar inverter and backup in one unit, especially new solar-plus-battery installs.
Other battery brands we cover
| Battery | Usable capacity | Installed price (sourced) | Warranty |
|---|---|---|---|
| BYD Battery-Box Premium HVS and HVM | 5.1 to 12.8 kWh usable, 2 to 5 modules of 2.56 kWh | $14,009-$16,009 (13.8 kWh) | 10 years (conditions apply) |
| sonnenBatterie 12 and Evo | 9.4, 18.8 or 28.2 kWh usable (1 to 3 modules) | $14,076-$15,876 (10 kWh) | 10 years or 10,000 cycles |
| Fox ESS EQ4800 | 9.32 to 41.93 kWh (2 to 9 modules in series) | $9,500-$11,000 (10 kWh) | 10 years |
| Alpha ESS SMILE5 | SMILE-BAT-13.3P: 13.34 kWh usable, 100% depth of discharge, LFP | $12,817-$14,817 (13.3 kWh) | 5-year product, 10-year performance (battery) |
| Sigenergy SigenStor | SigenStor BAT 5.0, 6.0, 8.0 and 10.0, warranted at 5.2, 6.0, 7.8 and 9.0 kWh usable | $15,973-$17,973 (15.6 kWh) | 10 years (15 with a paid extension) |
| Enphase IQ Battery 5P | 5.0 kWh per unit | No sourced price yet | 15 years / 6,000 cycles |
Ranked lists with stated criteria are on best home batteries, and every price band we can source is on the battery price guide.
Common questions about Tesla
How much does the Tesla Powerwall 3 cost in 2026?
$16,702-$17,251 fully installed before the federal rebate (Solar Choice, average installed cost of popular batteries (incl. federal rebate), checked 9 September 2026). The rebate on its 13.5 kWh usable is about $3,608 today, so roughly $13,094-$13,643 after it, before any state incentive.
How much is the battery rebate on the Tesla Powerwall 3?
About $3,608 for 13.5 kWh usable: 91 STCs (6.8 per kWh on the first 14 kWh) at a $39.65 STC price. From 1 January 2027 the factor drops to 5.7, which cuts it by about $595. Your installer applies it at point of sale.
What warranty does Tesla give?
10 years (Tesla, Powerwall 3 datasheet (Australia), checked 10 October 2026). Read the warranty document for the exact model you're quoted: conditions such as registration, cycles or capacity retention vary.
Can you add more capacity to a Powerwall 3 later?
Yes. Tesla's Australian datasheet allows up to three Powerwall 3 Expansion units behind one Powerwall 3, each 13.5 kWh nominal, for 54 kWh in total. Expansion units only work with Powerwall 3, and continuous charging is limited to 5 kW once they're fitted.
Where is Tesla based?
Tesla is headquartered in the USA. Ask your installer where the stock they're quoting was made, as manufacturing locations vary by product line.
Want Tesla Powerwall 3 on your roof?
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