Tesla Powerwall 3 cost: published prices and what installers add

Most home battery makers publish no price at all. Tesla is the interesting exception, because it publishes a price in some countries and refuses to in others, and the country where it refuses is the United States.

That is a more useful starting point than another article guessing at a number. This guide records exactly what Tesla publishes, where, and with which footnotes attached, then works through everything that sits between a published equipment price and the figure on an American quote. We read every Tesla page cited here on August 19, 2026. We have not installed or tested a Powerwall 3, and the specifications come from Tesla's own tables as recorded on our Powerwall 3 model page.

What Tesla publishes in the United States, which is nothing

Go to Tesla's US order page at tesla.com/powerwall/design and the page says: "Store energy and solar power for intelligent home battery backup. Enter home address to get an installation quote." There is a field for a home address, a field for existing equipment, and a Next button. No figure appears before you supply an address. The URL tesla.com/powerwall/get redirects to the same page.

Tesla's own support article, "What to Expect for Powerwall 3," asks the question directly and answers it the same way. Under "How much is Powerwall 3?" the entire answer is an instruction to "place an order online to view the price of your Powerwall."

So for an American reader the honest statement is that Tesla treats US Powerwall pricing as quote-gated. Anyone publishing a confident US dollar figure for a Powerwall 3 got it from an installer, a forum, or an estimate, not from Tesla.

The prices Tesla does publish

Two markets get list prices on the order page itself, before any address is entered.

Australia, at tesla.com/en_AU/powerwall/get, read August 19, 2026:

| Configuration | Published price |

| --- | --- |

| 1 Powerwall 3 | $11,450 AUD |

| 1 Powerwall 3 + 1 Expansion Unit | $20,050 AUD |

| 1 Powerwall 3 + 2 Expansion Units | $28,650 AUD |

Tesla notes on the same page that the single unit price "includes Gateway and accessories," and footnotes the table: "Price includes GST. Does not include delivery, installation, or other costs and fees. Final price will be provided by a Certified Installer."

United Kingdom, at tesla.com/en_GB/powerwall/get, read the same day:

| Configuration | Published price |

| --- | --- |

| 1 Powerwall 3 without Gateway | £5,000 |

| 1 Powerwall 3 with Gateway | £5,975 |

| 1 Powerwall 3 without Gateway + 1 Expansion Unit | £9,000 |

| 1 Powerwall 3 with Gateway + 1 Expansion Unit | £9,975 |

Tesla flags that the no-Gateway option "Requires Tesla Remote Meter (TRM), not included in price," and footnotes the table: "Does not include VAT, delivery, installation, or other costs and fees. Final price will be provided by a Certified Installer."

Both pages then say the same thing the US page says in a different way: after you submit, a Tesla Certified Installer in your area will reach out with pricing information and next steps.

Three cautions before anyone converts these into dollars. They are equipment prices in local markets with local tax treatment, local warranty law, local grid codes, and local demand. They exclude delivery and installation by Tesla's own footnote. And Tesla itself describes the final price as the installer's to provide. Treat them as a window into Tesla's price structure, not as a proxy for what an American install costs.

What the published lists reveal about structure

The useful part of a published list is not the total. It is the differences between rows, because those are Tesla's own arithmetic on individual components.

The Gateway is a separately priced item. On the British list, the same Powerwall 3 is £5,000 without a Gateway and £5,975 with one, so Tesla prices the Backup Gateway at £975 in that market. The no-Gateway row also carries a requirement for a Tesla Remote Meter that is explicitly not in the price. On the Australian list the Gateway is bundled instead, with the price stated to include Gateway and accessories. Same product family, two different packaging decisions, and that is precisely the line item an American quote can bundle or unbundle without you noticing.

An expansion unit costs meaningfully less than the first battery. On the Australian list, going from one Powerwall 3 to one Powerwall 3 plus an Expansion adds $8,600 AUD, and the second Expansion adds the same $8,600 AUD, against $11,450 AUD for the first unit. On the British list, an Expansion adds £4,000 in both the with-Gateway and without-Gateway pairs, against £5,975 for a Powerwall 3 with a Gateway. That is Tesla's published arithmetic, not ours, and it matches how Tesla describes the product.

Expansion units buy hours, not kilowatts

Tesla's support page on how Powerwall works states that "Powerwall 3 Expansion is designed for Powerwall 3 owners looking to extend backup duration at a reduced cost" and that "Each Powerwall 3 Expansion unit provides 13.5 kWh of additional energy capacity and can easily be installed with your Powerwall 3."

Read the two nouns Tesla chose: duration and energy capacity. The specification table on tesla.com/powerwall lists a Powerwall 3 at 13.5 kWh with 11.5 kW continuous on grid and 11.5 kW continuous in backup, plus a 185 LRA motor start rating, and describes scaling as "System expansion available anytime, 40.5 kWh max addition per unit." Tesla does not publish a separate continuous power rating for the Expansion.

That distinction is the biggest sizing decision on the quote. If your problem is that the battery runs out overnight, expansion units are the cheaper answer per kilowatt-hour on every published list above. If your problem is that too many things want to run at once, more energy does not solve it, and you are into a second Powerwall 3 rather than an Expansion. Our continuous versus peak power guide covers why those two columns behave so differently, and the sizing guide covers how to work out which problem you actually have.

What the installer adds

None of the following is published by anybody, because none of it is a property of the battery. It is a property of your house. In rough order of how much it moves a quote:

Backup scope. Whole home or a protected subpanel is a decision you make, not a feature you buy. Partial backup usually means a critical loads panel and the labor to move circuits into it, which is a real line item and sometimes a cheaper total. Our critical loads panel guide and the whole home versus essentials explainer cover the trade.

Main panel and service work. Whether your existing service panel and busbar can accept the new source without an upgrade is the single largest swing item on most battery quotes, and it is answered by a site assessment rather than by a datasheet. Get the finding in writing.

Gateway and metering hardware. As the British list shows, the backup switching hardware can be inside or outside the quoted equipment price, and a no-Gateway configuration can carry its own metering requirement. Ask which configuration you are being quoted.

Mounting and conduit. The Powerwall 3 is 43.5 by 24 by 7.6 inches per Tesla's specification table, rated from minus 4 to 122 degrees Fahrenheit with flood resistance to two feet. Where it lands relative to your panel decides conduit length, trenching if any, and how many hours the crew is on site. Our installation location guide covers the constraints.

Permit and inspection. The authority having jurisdiction sets what gets reviewed and how many visits it takes. Some jurisdictions treat a battery as a minor construction project and some barely blink, and that is labor and calendar rather than hardware. Our UL 9540 and NFPA 855 explainer covers the code layer in plain English.

Interconnection. Utility approval is its own process with its own queue, and the wait is not free to the installer carrying the job.

Solar scope. The Powerwall 3 carries an integrated solar inverter with six inputs and maximum power point trackers, and Tesla's specification table describes the unit as including an integrated inverter and system controller. A new solar-plus-battery design can use that. A retrofit behind an existing array often cannot, which changes the value of the same box without changing its price.

Labor. No manufacturer publishes this, and neither will we. It is a real and large part of the spread between two bids for identical equipment.

Reading a Powerwall 3 quote

Ask for these in writing and compare bids item by item rather than as one number:

1. Unit count and configuration. How many Powerwall 3 units, how many Expansion units, and the resulting kWh and kW written out separately.

2. Gateway. Whether a Backup Gateway is in the equipment line or a separate line, and what metering hardware the chosen configuration requires.

3. Backup scope. Whole home or partial, and if partial, which circuits and whether the subpanel and the circuit moves are included.

4. Panel work. Whether a service or panel upgrade is required at your address, stated as a site assessment finding rather than a general claim.

5. Solar. Whether the integrated inverter is being used, or whether the battery is going in behind an existing array.

6. Permit, inspection, and interconnection. Who files, who pays the fees, and what the current queue looks like in your jurisdiction.

7. What happens if the site assessment finds something. The change order terms matter more than the headline total.

The 2026 money picture

There is no federal purchase credit softening any of this. The Section 25D residential clean energy credit expired on December 31, 2025, so a homeowner buying a Powerwall 3 for cash or with a loan in 2026 gets zero federal credit. Section 48E survives, but it goes to the owner of the system, so it can reach a homeowner only indirectly through a lease or power purchase agreement where a company owns the hardware. Our 48E lease path guide explains the mechanism behind every zero-down offer you will be shown, and our 2026 tax credit guide has the full picture.

That makes state, utility, and virtual power plant programs the whole game on net cost, and it makes the scope decisions above the whole game on gross cost. Put your own numbers into the Worth It calculator before you sign anything, and get three itemized bids, because in the United States the itemized bid is the only price discovery mechanism Tesla has left you.