Tesla Powerwall 3 specs: capacity, power and what it can run
Powerwall 3 is a single wall-mounted unit with 13.5 kWh of usable energy and a built-in solar inverter. Here are the headline specs from Tesla’s Australian datasheet, what they mean for your home, and how we size it. We are accredited to install Tesla Powerwall.
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Headline specs (Tesla, Australia)
| Usable energy | 13.5 kWh per unit |
| Solar input | Up to 20 kW (built-in solar inverter) |
| Output | Can be set at 5, 10 or 11.04 kW |
| Protection | IP55 enclosure; IP67 battery and power electronics; indoor or outdoor |
| Noise at 1 m | Under 50 dB(A) typical, under 62 dB(A) maximum |
| Expansion | More Powerwall 3 units and Expansion units, up to seven in total (varies by market) |
| Warranty | Ten years, with at least 70% of 13.5 kWh retained at ten years; unit must stay registered and connected |
What it can run
The output setting limits how much can run at once, and the 13.5 kWh limits how long. A home with standard loads is very different from one with pumps and a workshop. We total up your loads at the site visit and tell you what a Powerwall 3 will and will not carry in an outage. See how long will a battery run my house in a blackout?
Is it right for you?
- Existing solar you want to keep: Tesla says Powerwall 3 works with all major inverter brands, with limits on AC-coupled solar in the backup circuit.
- A new solar and battery install with the Tesla app: good fit.
- Need to grow module by module, or want a DC EV charger: compare with Sigenergy.
More: Tesla Powerwall installer, Powerwall 3 vs Sigenergy SigenStor, Powerwall 2 vs Powerwall 3 and the Tesla Powerwall owner guide.
Why locals choose us
- Our own in-house team designs every system and does every install. 25 years in solar and large commercial electrical work. No subcontractors.
- A face-to-face site visit before every install: compliant battery position, switchboard and RCBO check, no surprises on the day.
- SAA-accredited installer and Sigenergy-approved, with a 25-year workmanship warranty on our installation work.
Questions we get asked
How big is a Powerwall 3?
Tesla publishes the dimensions on its datasheet; we confirm space and clearances at the site visit. See where a battery can go.
How much does a Powerwall 3 hold?
13.5 kWh of usable energy per unit.
Can a Powerwall 3 power my whole house?
It can back up the home, within its output setting and stored energy. We check your loads first.
Does a Powerwall 3 get the federal rebate?
If the exact model and installation are eligible, yes. We check before it goes in your proposal.
Sources
Last checked 7 October 2026. Only the manufacturer’s, the network’s or the government’s own documents are used; app menus and defaults change between models and versions, so if your screen looks different, call us rather than guess.
- Tesla’s official Powerwall 3 datasheet (Australia): usable energy, solar input, output, protection ratings, noise, warranty
- Tesla’s official Powerwall warranty for Australia and New Zealand
- Tesla Australia support: What to Expect for Powerwall 3
