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.
Tesla Powerwall 3 + Expansion at a glance.
These manufacturer-published figures help compare equipment. Final compatibility, configuration, and warranty coverage are confirmed for the specific project.
| 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 |
Strengths worth putting into context.
- 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
Projects with these priorities.
- New solar-plus-storage projects
- Homeowners who want a unified Tesla energy experience
- Projects that need strong motor-starting and whole-home potential
Questions we answer before specifying Powerwall 3 + Expansion.
- 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?
Specifications are only the starting point.
Published capacity, output, efficiency, and warranty information help narrow the field. A valid Florida project also requires compatible electrical design, roof or mounting review, permits, utility interconnection, manufacturer instructions, and a clear service plan.
We use the current manufacturer documentation when preparing the final system scope. If equipment availability changes, any proposed substitution should be documented and reviewed before installation.