Powerwall FAQs



Overview

What is Powerwall?
What can I use Powerwall for?
What equipment is included in a Powerwall installation?
How can I control Powerwall?
Can Powerwall work without Internet?
What is Powerwall’s warranty and maintenance requirements?
How do I buy and install a Powerwall?

Solar Integration

Can I add a Powerwall to my existing solar system?
Can Powerwall charge my Tesla vehicle or an EV?
During a power outage, how quickly does Powerwall restore power to my home?
During a power outage, can I use my solar and recharge my Powerwall?
How many appliances can I back up?
During a power outage, how long will Powerwall last?
During a utility power outage, how do I extend the amount of time my home can run on Powerwall?
Can Powerwall go off-grid?

 

What is Powerwall?
Powerwall is a rechargeable home battery system that stores energy from solar or from the grid and makes it available on demand. It can power your home during the night or back up your home in the event of a power outage. With its built-in battery inverter, Powerwall is compact and easy to integrate into your home. As with all Tesla products, new features will be added to Powerwall with over-the-air updates.

 

What can I use Powerwall for?
Powerwall can be used for a variety of applications, including:

  • Self-Powering your Home
    With Powerwall you can use more of your solar by storing the excess energy and using it at night, which roughly doubles the amount of solar energy that directly powers your home.
  • Backup Power
    Powerwall provides seamless backup power in the event of a utility power outage. For a longer outage, Powerwall can recharge from your solar power system. If necessary, you can even run your home off solar and Powerwall indefinitely.
  • Home Energy Monitoring
    You can monitor your solar, Powerwall and home energy use in real time with the Tesla mobile app.
  • Time-of-Use Load Shifting
    If your utility offers a time-of-use rate plan, Powerwall can charge when rates are low and use that energy during expensive times to reduce your electricity bill. This feature will be available at a later date by an over-the-air update.

 

What equipment is included in a Powerwall installation?
The Powerwall system consists of a Powerwall unit and supporting hardware called the Backup Gateway. The Backup Gateway has an automatic disconnect which allows you to safely disconnect from the grid during an outage. It also includes metering and communication functions for up to 10 Powerwalls to coordinate and receive over-the-air updates.

 

How can I control Powerwall?
The Tesla mobile app allows you to manage all of your Tesla products - Model S, Model X, Model 3 and Powerwall - anytime, anywhere. When you select Powerwall as your product, you can choose between different modes, such as Backup Only or Self-Powered. In the Self-Powered mode, you can reserve a percentage of your Powerwall for an outage. As with all Tesla products, we will continue to add new features and modes over time.

 

Can Powerwall work without Internet?
Powerwall needs internet (wired Ethernet or your home Wi-Fi) or cellular service to communicate with the Tesla mobile app and receive software updates. A reliable connection is required to provide new product features over time. Powerwall can function if the connection is temporarily lost but should not be installed in a location without internet or cellular service.

 

What is Powerwall’s warranty and maintenance requirements?
Powerwall does not require maintenance and comes with a 10-year unlimited cycle warranty when used in Self-Powered or Backup mode.

 

How do I buy and install a Powerwall?

  • Place a deposit here
  • Complete a home energy assessment with a product specialist
  • Review and approve your custom design with your product specialist
  • Schedule installation of Powerwall at your convenience
  • Installation and set up is performed by Tesla or a Powerwall Certified Installer

Solar Integration

 

Can I add a Powerwall to my existing solar system?
Yes, Powerwall can be integrated with your existing solar system. Powerwall is compatible with solar inverters from SMA, SolarEdge, Fronius, Enphase micro inverter, Delta and ABB. We continue to explore compatibility with other inverter companies.

 

Can Powerwall charge my Tesla vehicle or an EV?
Yes, Powerwall can provide stored solar energy to your EV through your home electrical panel. However, there is no direct connection between Powerwall and the EV wall connector.

 

During a power outage, how quickly does Powerwall restore power to my home?
Powerwall can detect an outage, disconnect from the grid and bring power back to your home in a fraction of a second. Unlike backup generators, Powerwall can keep your appliances running without interruption. You will not even notice that the power went out.

 

During a power outage, can I use my solar and recharge my Powerwall?
Yes, Powerwall is able to keep a home solar system running during a power outage to recharge during extended outages. When more solar is being produced than can be used or stored, Powerwall is able to turn off the solar system and turn it back on when the energy can be used again.

 

How many appliances can I back up?
Each Powerwall can provide up to 5 kW of continuous power. You can back up any number of appliances, so long as their combined power usage does not exceed the total power rating of your Powerwalls. For the power needs of typical appliances, you can visit this link for more information.

 

During a power outage, how long will Powerwall last?
An average US home uses approximately 25 kWh of energy per day. A small home may use as little as 10 kWh and a large home may use 40 kWh or more per day. Each Powerwall provides 13.5 kWh of usable energy for backup power. You can use the Tesla mobile app to monitor your usage and conserve power to extend your backup coverage for a day or more. Additionally, when Powerwall is paired with solar it can continue to recharge and has the potential to run your home indefinitely. To understand how long Powerwall will last in an outage based on your daily routines, click here.

 

During a utility power outage, how do I extend the amount of time my home can run on Powerwall?
The best way to extend your usage of Powerwall during an outage is to limit the energy consumption of your home. You can do this by monitoring your use of non-essential or energy-hungry appliances like air conditioners, plasma TVs, hairdryers, and hot tubs. For more information about typical power consumption of different household appliances, visit this link.

 

Can Powerwall go off-grid?
“Off-grid” may have different meanings:

  • If you are looking to be less reliant on your utility, Powerwall in the Self-Powered mode provides energy independence by using less grid power. This feature is available today.
  • When there is a utility power outage, Powerwall and your solar power system can provide backup power to your home. This feature is available today.
  • If you are in a remote area without access to utility power, Powerwall and solar can offer an off-grid solution. For our remote off-grid offering, please place a deposit here and someone will contact you to further discuss.

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