Tesla Powerwall 3 Installation
Melbourne & Regional Victoria
One box. 13.5kWh of storage, a built-in solar inverter, and enough power to run ducted air-con, an EV charger and the rest of your home at once. Supply Solar installs the Tesla Powerwall 3 with the federal rebate handled and no separate inverter cost.
Get Your Free Powerwall Quote
We'll confirm your rebate eligibility and design
No obligation · We call within 2 business hours
What Is the Tesla Powerwall 3?
Built-in inverter, one unit
No separate hybrid inverter to buy or wire in. The Powerwall 3 accepts up to 20kW DC of solar directly across 3 MPPTs, simplifying new installs and cutting a cost most other batteries still carry.
Power for big appliances
11.5kW of continuous output — more than double most competing batteries — means ducted air-con, an EV charger and the rest of the house can run together without tripping.
Whole-home backup, managed by app
With a Tesla Backup Gateway, the Powerwall 3 islands your home automatically during an outage. Monitor generation, usage and backup reserve live from the Tesla app.
Tesla Powerwall 3 — Specs at a Glance
The numbers that matter when comparing a battery — capacity, power output and what's included.
| Specification | Tesla Powerwall 3 |
|---|---|
| Usable capacity | 13.5 kWh per unit |
| Expansion | Up to 3 expansion units — 54 kWh total (4 units) |
| Continuous power output | 11.5 kW AC |
| Solar inverter | Built in — up to 20kW DC solar input, 3 MPPTs |
| Battery chemistry | LFP (Lithium Iron Phosphate) |
| Whole-home backup | Yes, with Tesla Backup Gateway — grid-forming |
| Phase | Single phase, 230VAC |
| Weatherproofing | IP67 (battery) · IP55 (wiring compartment) · -20°C to 50°C |
| Warranty | 10 years · 70% capacity retention guarantee |
| Monitoring | Tesla app — real-time generation, usage & backup reserve |
Specifications per Tesla Energy product documentation. Supply Solar confirms exact configuration for your site during your free assessment.
- Built-in solar inverter — no separate hybrid inverter needed
- 11.5kW continuous output — handles big loads together
- Expandable to 4 units, 54kWh total
- Grid-forming whole-home backup with Backup Gateway
- 10-year warranty · IP67 · Tesla app control
- Adds to any existing solar inverter — no replacement
- 5kWh/8kWh modules, stackable up to ~48kWh
- 10-year warranty · safe LFP chemistry
- 5-in-1: inverter, battery, EMS & optional EV DC charger
- Supports three-phase — the Powerwall 3 doesn't
- 10-year warranty · near-instant backup
Tesla Powerwall 3 vs GoodWe ESA vs Sigenergy
Every home is different. Use this as a starting point, then talk to our team for a personalised recommendation.
| Feature | Tesla Powerwall 3 | GoodWe ESA | Sigenergy SigenStor |
|---|---|---|---|
| Usable capacity | 13.5–54 kWh | 5–48 kWh (modular) | 5–48 kWh+ (modular) |
| Continuous power output | 11.5 kW — highest of the three | Depends on paired inverter | Up to 12 kW (model dependent) |
| Built-in solar inverter | Yes — up to 20kW DC, 3 MPPTs | AC-coupled (works with any inverter) | Yes (hybrid, 5-in-1) |
| Phase support | Single phase only | Depends on paired inverter | Single or three-phase |
| Whole-home backup | Grid-forming, with Backup Gateway | With compatible gateway | Near-instant, automatic |
| Built-in EV charging | No (charges via a separate EV charger) | No | Optional, up to 25kW DC |
| Expandable | Up to 4 units, 54kWh total | Up to 6 modules per stack | Most flexible — up to 6 modules + parallel stacks |
| Monitoring app | Tesla app | GoodWe SEMS | mySigen |
| Warranty | 10 years · 70% retention guarantee | 10 years | 10 years |
| Best suited to | Single-phase homes wanting maximum power output in one unit | Existing solar owners wanting the simplest retrofit | Three-phase homes & built-in EV DC charging |
Contact Supply Solar for a personalised recommendation based on your home's usage, existing inverter, phase and roof.
Rebates We Apply to Your Tesla Powerwall
The Powerwall 3 is on the Clean Energy Council's approved battery list — Supply Solar confirms your eligibility and handles all the paperwork.
Cheaper Home Batteries Program (Federal)
The Australian Government's battery rebate, launched 1 July 2025, provides a subsidy on eligible home battery installations — calculated per usable kWh and applied directly to your Powerwall 3 quote. The Powerwall 3's VPP compatibility meets the scheme's eligibility requirement.
All battery rebates →Pair With Solar Homes Program
Installing a Powerwall 3 alongside a new solar system? You may also qualify for the Solar Homes Program rebate at the same time. We check and lodge both — one quote, all rebates confirmed.
Battery rebates VIC →Solar + Tesla Powerwall Packages
Because the Powerwall 3 has a built-in inverter, pairing it with a new solar system is one of the simplest ways to go solar and battery together.
Powerwall 3 Retrofit
Already have solar but selling too much back to the grid? We assess your existing inverter and wiring, then retrofit a Tesla Powerwall 3 — or recommend an easier-fit alternative if your setup calls for it.
- Existing system compatibility check included
- Federal battery rebate applied
- Honest advice if a different battery suits your setup better
Full Solar + Powerwall 3 Package
Start from scratch with the Powerwall 3's built-in inverter handling both solar conversion and storage in one unit. No separate hybrid inverter, no compromises — just a clean, all-in-one system.
- Built-in inverter — no separate solar inverter needed
- Solar Homes rebate + federal battery rebate lodged
- Single installation, single team, one clean quote
From Quote to First Charge
Free assessment
We review your power bill, existing solar setup, switchboard and goals to confirm whether the Powerwall 3 is the right fit — no pressure to proceed.
Clear quote
One quote with every applicable rebate already applied — federal battery subsidy, Solar Homes if eligible. No surprises.
We install
Our CEC-accredited team handles the full Powerwall 3 installation, Backup Gateway setup, grid pre-approval and all compliance paperwork.
Start storing
Your Powerwall goes live and you start using your own solar around the clock — monitor generation, usage and backup reserve from the Tesla app.
Accredited, Award-Winning & Genuinely Local
Award-winning installer
Winners of the 2023 CEC Collaboration Award and the 2024 EUPD Australian Installer Award — the industry's leading recognition for quality installation practice, including premium battery systems like the Powerwall 3.
CEC Accredited & NETCC Approved
Your installation is done right, your warranties hold, and your rebates are protected. We carry every credential that matters to Victorian homeowners.
Cranbourne-based, Melbourne-wide
Our team is based in South East Melbourne and services all of greater Melbourne and Regional Victoria. When something needs attention, we're not interstate — we're around the corner.
Rebates & paperwork — all handled
We confirm your eligibility, lodge the Cheaper Home Batteries rebate, and handle grid pre-approvals. Your job is to enjoy the savings.
Tesla Powerwall Installation Near You
We install the Tesla Powerwall 3 right across greater Melbourne and regional Victoria. Find your area below.
What Melbourne Homeowners Say
"Had a Powerwall 3 retrofitted to our existing 10kW system. Supply Solar checked our old inverter first and explained the built-in inverter meant it could be replaced entirely — one clean unit. Install was tidy and it was live the same day."
"We wanted enough power to run ducted air-con and charge the car at the same time without tripping anything. The Powerwall's 11.5kW output does exactly that. Supply Solar explained the federal rebate clearly and the quote matched the final bill."
"We did new solar plus a Powerwall 3 as a package — one unit for solar conversion and storage instead of a separate inverter and battery. Supply Solar handled both rebates and the grid approval. Our evening usage is now almost entirely from the battery."
Tesla Powerwall 3 FAQs
How much does a Tesla Powerwall 3 cost in Melbourne?
Is the Tesla Powerwall 3 worth it in 2026?
Does the Tesla Powerwall 3 need a separate solar inverter?
Can the Tesla Powerwall 3 be installed on a three-phase home?
How long does a Tesla Powerwall 3 last?
Can a Tesla Powerwall 3 keep my home running during a blackout?
What is the difference between Tesla Powerwall 2 and Powerwall 3?
Is the Tesla Powerwall 3 eligible for the federal battery rebate?
Related Services
Ready for the Most Powerful Battery on the Market?
Get a free, no-obligation Tesla Powerwall 3 quote with your federal rebate confirmed and all paperwork handled. A local Supply Solar specialist will call you within 2 business hours.
No obligation · Federal rebate handled · CEC-accredited · Melbourne & Regional Victoria