Powerwall 3 + Expansion
Current model: Powerwall 3 · Powerwall 3 Expansion
Tesla's current integrated battery platform, with a lower-cost expansion option for added runtime.
Tesla's current integrated battery platform, with a lower-cost expansion option for added runtime.
Powerwall 3 combines a 13.5 kWh home battery with an integrated solar inverter and system controls. Powerwall 3 Expansion adds another 13.5 kWh of stored energy without duplicating the inverter. Tesla supports systems with up to four Powerwall 3 units and up to three Expansion units, subject to the final design.
Final model, configuration, availability, and warranty terms are confirmed in the written proposal.
Powerwall 3 + Expansion at a glance.
Your proposal confirms the final configuration, compatibility, and warranty.
| Specification | Published value |
|---|---|
| Model | Powerwall 3 · Powerwall 3 Expansion |
| Usable energy | 13.5 kWh per unit |
| Continuous output | Up to 11.5 kW per Powerwall 3 |
| Solar input / architecture | Integrated inverter · 6 MPPTs · up to 20 kW DC input |
| Manufacturer warranty | 10 years |
Key strengths
- Integrated solar inverter with six MPPT inputs
- High continuous output for larger household loads
- Storm Watch and app-based energy monitoring
- Powerwall 3 Expansion adds capacity without another inverter
Best suited for
- New solar-plus-storage projects
- Homeowners who want a unified Tesla energy experience
- Projects that need strong motor-starting and whole-home potential
Questions this product must answer
- Which loads should stay on during an outage?
- Is the project new solar, battery-only, or an expansion?
- How much stored energy is needed after sunset?
- Does the electrical layout support the preferred backup configuration?
The complete system still matters
Capacity, output, efficiency, and warranty narrow the field. The final choice must also fit the roof, electrical design, permits, utility, and service plan.
Any proposed equipment substitution should be documented and reviewed before installation.