Tesla Powerwall 2
A wall-mounted home battery of 13.5 kWh with 5 kW of continuous power and quick backup transition, listed by Tesla next to the newer Powerwall 3.
- Best for 13.5 kWh AC-coupled use
- Installed battery
- 13.5 kWh
- 10-year warranty
- Made by Tesla.
- Energy: 13.5 kWh. Tesla refers to its Powerwall technical specifications for the details behind that figure.
- Power: 5 kW continuous on the grid side and 7 kW peak backup power, with 106 A motor start (locked rotor amps).
- Up to 10 units can be combined. Tesla lists a 10-year warranty.
- Tesla now leads with Powerwall 3 on this page: Powerwall 2 is shown only as a second tab in the specification table.
Not tested by us
We have not tested the Tesla Powerwall 2. The figures on this page come from the sources listed at the end of the page, checked on 11 November 2026, and we do not show prices. "Best for" is based on what the maker says the product is designed for, not on our own tests.
Key figures
13.5 kWh
Energy capacity
5 kW
Continuous power
10 years
Warranty
Specifications
Last checked on 11 November 2026. The grey text under each name explains what the value means.
| Specification | Value |
|---|---|
| Storage | |
| CapacityHow much energy the battery stores. Bigger means longer runtime or more of your own solar power used later. | 13.5 kWh (Tesla's footnote refers to the Powerwall technical specifications for the conditions) |
| Battery chemistryLFP (lithium iron phosphate) cells are known for long life and stable behaviour with heat. | Not stated on the Tesla page |
| Cycle lifeHow many full charge and discharge cycles the cells are rated for before they hold less than the stated share of their original capacity. | Not stated on the Tesla page |
| ExpansionExtra battery units that add storage to the same system. | Up to 10 units |
| Power | |
| AC outputThe power it can deliver through its sockets or inverter, in watts. | 5 kW continuous (on-grid) |
| Peak outputA short burst above the continuous rating, for example to start a motor. It cannot be held. | 7 kW peak backup power |
| Motor start (LRA)The current the unit can supply for a moment to start a motor, such as a pump or compressor. | 106 A locked rotor amps motor start |
| Backup in a power cutWhether it can keep selected circuits running during a grid outage. | Yes: quick backup transition |
| Round-trip efficiencyThe share of the energy you put in that comes back out. The rest is lost as heat. | Not stated for Powerwall 2 on the Tesla page |
| Solar | |
| Solar inverterTurns the DC power from solar panels into AC for the home. Built in means no separate solar inverter is needed. | Not stated for Powerwall 2 (the integrated solar inverter on the page belongs to Powerwall 3) |
| Connection and housing | |
| Dimensions (H × W × D)Check the wall or floor space before you buy, including room for airflow and cables. | 1,150 × 753 × 147 mm |
| WeightMatters for lifting, wall mounting and moving it. | 114 kg |
| Protection ratingIP ratings show protection from dust and water. IP55 and IP65 are rated for outdoor-style exposure; check the installation guidance. | Water and dust resistance (no IP class stated) |
| Operating temperatureThe range it is rated to work in. Cold and heat can reduce performance. | -20 to 50 °C |
| CertificationsSafety and grid standards the maker says the product meets. | Meets local safety standards and regulations |
| Warranty | |
| WarrantyThe period the maker covers. Read the terms: conditions and capacity guarantees differ. | 10 years |
Compatible with
What Tesla says this product works with. Anything not listed here is not confirmed.
- Scaling
- Tesla lists up to 10 units per system.
- Solar inverters
- Not stated for Powerwall 2 on the Tesla page; ask a Tesla Certified Installer.
Rules where you live
An installed battery normally needs a qualified electrician, and in many countries you must also tell your grid operator, especially if it can export. This is not a plug-in battery. Rules, incentives and tax treatment differ by country: see our country guides for what applies where you live.
Strengths and things to check
Strengths
- 13.5 kWh in one wall-mounted unit
- Up to 10 units in one system
- Quick backup transition
- -20 to 50 °C operating range
- 10-year warranty
Worth checking before you buy
- Tesla leads with Powerwall 3, so availability of Powerwall 2 is not confirmed
- Only a short specification list: no chemistry, cycles or efficiency
- 114 kg: needs a proper wall or floor installation
- An installed battery needs a Tesla Certified Installer
Change log
We record changes to this page here, so you can see when figures such as the warranty were last updated.
- 11 November 2026
- Page published. Figures are from the Powerwall 2 tab of the specification table on the Tesla UK Powerwall page. Warranty at publication: 10 years. Tesla's page now promotes Powerwall 3 and does not say whether Powerwall 2 is still sold in your country.
Where this information comes from
We have not tested this battery. Every figure above comes from the Powerwall 2 tab in the specification table on Tesla's UK Powerwall page, last checked on 11 November 2026. A value that the page does not state is shown as not stated.
We do not show prices, because they depend on the installer's quote.
- Manufacturer Tesla UK Powerwall page
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Common questions about Tesla Powerwall 2
How much does the Tesla Powerwall 2 store?
Tesla lists 13.5 kWh of energy capacity, with 5 kW continuous power and 7 kW peak backup power.
Is the Powerwall 2 still sold?
Tesla's UK page now leads with Powerwall 3 and still shows a Powerwall 2 column in its specification table. It does not say whether Powerwall 2 can still be ordered, so ask a Tesla Certified Installer.
How long is the warranty?
Tesla lists a duration of 10 years for Powerwall 2. The page does not give the conditions.
Related guides
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