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Tesla Powerwall II Warranty Explained

Tesla Powerwall II Warranty Explained

The most prominent battery on the market is the Tesla Powerwall II battery. Its sleek exterior is space-age, and the battery features a 5kW battery inverter which means that the battery can be fed AC (alternating current) electricity. This means there is no need for a hybrid inverter as there is no need for DC coupling.

Powerwall II Specifications

Energy Capacity:

  • Minimum 13.5kWh usable energy (14kWh total energy)
  • 100% depth of discharge
  • 90% round trip efficiency (for every 10kWh the Powerwall is charged with, it can provide 9kWh of usable energy)


  • 7kW peak / 5kW continuous
  • Quick backup transition
  • Pure sine wave output

Size and Weight:

  • 1150mm x 753mm x 147mm (L x W x D)
  • 114kg


  • Floor or wall mounted
  • Indoor and outdoor
  • Up to 10 Powerwalls
  • -20°C to 50°C
  • Water and dust resistance to IP67


  • Meets local standards and regulations


  • 10-year comprehensive warranty

Criteria for Warranty to be Valid

The installation must be completed per the installation manual. This will be standard for (good) installers in Australia.

In order to qualify for the complete warranty coverage, the Powerwall must be registered and connected to the internet for software updates. If it is not connected to the internet or experiences an extended period of disconnection, Tesla will offer a four-year warranty instead.

The Powerwall should be used in a standard manner, without any unauthorised hacking or modifications.

Tesla’s warranty does not extend to events beyond their control, such as wars, disasters, and theft.

Operating Limitation:

  • For self-consumption, Tesla warrants unlimited cycles. This means that there is no limit to throughput.
  • For other applications, Tesla warrants 37.8 MWh of aggregate throughput, which equals 2.8 MWh per kWh of usable battery capacity. These “other” applications include joining a VPP (Virtual Power Plant). Each time the VPP pulls from the battery, it ticks off a little bit of that 37.8 MWh limit.
  • Note: A VPP would have to pull greater than 10.3 kWh from your battery every day for 10 years to go over this 37.8 MWh throughput limit. This won’t happen, that’s not how VPPs work.

What the warranty covers

  • The warranty applies to each individual component of the battery. This includes the 13.5kWh battery module, gateway/backup gateway, and gateway meter.
  • 70% of storage capacity is guaranteed after 10 years.
  • All components will be defect free for 10 years.


  • Maintenance is not required for the warranty, as stated in the installation manual. However, the owner must ensure the Powerwall is kept clean and its vents are clear of obstructions, especially in Australia where spider webs can be a common issue, particularly in Queensland.
  • Tesla’s warranty excludes compensation if the Powerwall breaks down, but Australian Consumer Guarantees allow for claims of reasonable losses due to product faults.
  • The Powerwall warranty can be transferred to new homeowners if the house is sold, but removing the Powerwall and reinstalling it elsewhere (i.e., another address) voids the warranty.
  • In addition to the written warranty, Australian Consumer Guarantees provide extra protection for consumers in the country. While Tesla may be slow in honouring these guarantees, consumers have the option to claim under Australian Consumer Guarantees if necessary.
  • If there are delays in addressing consumer concerns, please inform us so we can report on the situation if Tesla is not fulfilling its obligations.
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