Tesla Powerwall Explained: How Much Does a Powerwall Cost?
Quick answer: The current Tesla Powerwall 3 stores 13.5 kWh, delivers 11.5 kW of continuous power and has a solar inverter built in. It typically costs about $13,000 to $16,500 installed in 2026, and batteries installed now no longer qualify for the federal tax credit.
The Tesla Powerwall is one of the best-known home batteries in the US. It stores electricity, usually from rooftop solar, so you can use it in the evening, during expensive peak hours or when the power goes out. The current model is the Powerwall 3.
Powerwall 3 at a glance
| Spec | Powerwall 3 |
|---|---|
| Usable storage | 13.5 kWh |
| Continuous power | 11.5 kW |
| Battery chemistry | Lithium iron phosphate (LFP) |
| Solar inverter | Built in |
| Warranty | 10 years, with at least 70% of capacity retained |
The built-in solar inverter is the big change from earlier models. Solar panels can connect straight to the Powerwall 3, so a new solar-plus-battery system needs less separate equipment. The higher power output also makes it easier to start large appliances like air conditioners and well pumps during an outage.
How much does a Powerwall cost?
In 2026, a single Powerwall 3 typically costs about $13,000 to $16,500 installed, depending on the installer, your electrical setup and whether it’s installed with new solar. For comparison, EnergySage’s July 2026 data puts the typical installed cost of a 13.5 kWh home battery from any brand at about $15,650.
Batteries installed in 2026 or later no longer qualify for the federal residential tax credit, which ended after December 31, 2025. Some states and utilities offer battery rebates or pay you to share your battery’s power during peak demand. Tesla has also offered Powerwall leases in the areas it serves directly since late 2025. See solar and battery incentives.
How the Powerwall works
With solar
During the day, your panels power your home first. Extra solar power charges the Powerwall, and anything beyond that goes to the grid. In the evening, the Powerwall powers your home before you draw from the grid.
Without solar
A Powerwall can also charge from the grid. That’s useful for backup power alone, or on time-of-use rates, where you charge when electricity is cheap and use the stored power when it’s expensive.
During an outage
Tesla’s Backup Gateway or Backup Switch detects the outage and disconnects your home from the grid within a fraction of a second, so the Powerwall can safely keep things running. With solar, the panels keep recharging it during the day. See solar during power outages.
The Tesla app
The Tesla app shows solar production, home use, battery level and grid use in real time. You can choose modes that prioritize backup reserve, self-powering from solar, or saving money on time-of-use rates, and set how much charge to keep in reserve for outages.
How many do you need?
One Powerwall is enough to cover essentials like the refrigerator, lights, internet and some outlets through a typical night. Whole-home backup with central air or electric heat often needs two or more. Tesla also sells expansion units that add storage to a Powerwall 3 without adding another inverter.
Older models: Powerwall 2 and Powerwall+
The Powerwall 2 also stored 13.5 kWh but delivered only 5 kW of continuous power and needed a separate solar inverter. The Powerwall+ combined a Powerwall 2 with a Tesla solar inverter. Both have been replaced by the Powerwall 3 for new installations.
Alternatives to consider
- Enphase IQ Battery 5P and 10C: modular LFP batteries that pair with Enphase microinverter systems, with 15-year warranties.
- FranklinWH aPower 2: 15 kWh of storage with a 15-year warranty.
- sonnenCore+: stackable LFP units with a 10-year warranty.
The right choice often depends on your existing solar equipment and which brands local installers support. Our guides to solar backup batteries and battery lifespan go further.
