Tesla Powerwall 3 Expansion Pack on the Central Coast
Boost Your Powerwall 3 Storage with the New Tesla Expansion Pack
If you already have a Tesla Powerwall 3, you can now increase your usable energy storage without replacing your system. The new Powerwall 3 Expansion Pack lets you add extra battery capacity at a lower cost — especially with current Australian federal battery rebates helping to bring the price down.
The Expansion Pack is a battery-only add-on that connects directly to your existing Powerwall 3. There’s no extra inverter required — your current Powerwall 3 manages the entire system. This keeps installation simpler and more affordable.
The Expansion Pack is designed for indoor or outdoor installation, with a robust enclosure rated for coastal air, heat, humidity, and storms — making it a dependable choice for homes across Gosford, Terrigal, Wamberal, Avoca, Kincumber, The Entrance & surrounds.
As Tesla-certified installers, Coastal Solar provides local guidance, quality workmanship, and ongoing support to ensure your system performs at its best.
The Tesla Powerwall 3 Expansion Pack is the simplest and most cost-effective way to increase the storage capacity of your existing Powerwall 3 system. It adds an additional 13.5 kWh of usable energy storage without the need for a second inverter, because your main Powerwall 3 controls the entire setup. This keeps installation straightforward and helps reduce overall upgrade costs.
With more storage, you can hold onto a greater share of the solar energy your roof produces during the day, and use it later in the evening when electricity prices are highest. It also strengthens your backup power capacity, keeping essential appliances running during outages — an advantage on the Central Coast, where storm-related power cuts are not uncommon.
For homes in Gosford, Bateau Bay, Terrigal, Wamberal, Avoca, Umina Beach and surrounding suburbs, the Expansion Pack provides a straightforward way to reduce reliance on the grid, improve energy resilience, and move closer toward genuine energy independence.
How to Order Your Tesla Powerwall 3 Expansion Pack
The Expansion Pack does not include its own inverter. Instead, it connects directly to your existing Powerwall 3, which manages the entire system. This keeps the upgrade simpler, cleaner, and more efficient than installing a second standalone battery.
You continue to control and monitor everything through the Tesla app, including how and when stored energy is used.
Ready to expand your home’s battery storage? The process is simple:
1. Request a Quote
Contact Coastal Solar Solutions for a personalised assessment of your existing Powerwall 3 setup.
2. Confirm Rebate Eligibility
We’ll check available battery incentives and guide you through any required steps to access them.
3. Schedule Installation
Our Tesla Certified installers complete the upgrade with clean, professional workmanship.
4. Start Storing More Solar
Use the Tesla app to track energy production, monitor storage levels, and optimise your home’s power use.
Tesla Powerwall 3 Expansion Pack Specifications
Battery Specifications
- Model Reference: 1807000-xx-y
- Usable Energy Capacity: 13.5 kWh
- Operating Voltage Range: 52 V to 92 V DC
Physical & Mechanical Details
- Dimensions: 1105 mm (H) × 609 mm (W) × 168 mm (D)
- Installed Weight (with cover & mounting bracket): 118.5 kg
- Battery Module Weight (without cover or bracket): ~110 kg
- Mounting Options: Wall-mounted or floor-mounted installation
- Stacking (Floor Mount Only): Can be installed with up to three Expansion Packs in-line behind one Powerwall 3
- Designed exclusively for use with Tesla Powerwall 3
- The Expansion Pack does not contain its own inverter
How the Expansion Pack Works
The Expansion Pack does not include its own inverter. Instead, it connects directly to your existing Powerwall 3, which manages the entire system. This keeps the upgrade simpler, cleaner, and more efficient than installing a second standalone battery.
You continue to control and monitor everything through the Tesla app, including how and when stored energy is used.
Benefits for Central Coast Homes
-
More Solar Self-Consumption
Use more of your own energy instead of buying from the grid. -
Stronger Backup Protection
Extended battery capacity helps keep essential appliances running during outages. -
Flexible System Growth
You can add up to three expansion packs to one Powerwall 3, scaling storage as your home’s energy use grows (EV charging, electric heating, pool pumps, etc.). -
Supports Energy Independence
Store energy day or night and reduce reliance on power retailers.
Ready to Power Your Home with Solar? Let’s Get Started
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Why choose Coastal Solar Solutions
1. We're local, just like you
Being local to the Central Coast means we understand the conditions here, allowing us to quickly diagnose the potential problem.
2. We're certified
As certified solar repair specialists, we have the necessary training and qualifications to safely and effectively repair all types of solar inverters.
3. Fast response times
Because we’re based on the Central Coast, we offer fast response times, keeping downtime of your system to a minimum.
