Powerwall FAQs



Overview

What is Powerwall?
What can I use Powerwall for?
Can Powerwall work without Internet?

Solar Integration

Can I add a Powerwall to my existing solar system?
Can Powerwall go off-grid?

Generator Integration

Does Powerwall work with existing battery systems?
I have a wind turbine/hydro turbine. Can I charge Powerwall with it?

Installations

What are the different components that make up a Powerwall system?
What does a Powerwall system look like with all the additional equipment installed?
What does a multiple Powerwall installation look like?
What are the environmental requirements for a Powerwall installation?

Functionality

How does Self-Powered mode work?
How can I monitor Powerwall operation?
Can Powerwall charge from the grid?
Can Powerwall charge my Tesla vehicle or an EV?

Powerwall App

How do I download and set up the Tesla mobile app?
What is the Power Flow in the app?
How do I see energy usage history?
Is there a website where I can monitor my Powerwall from my desktop computer?
Why is my Powerwall not charging?
Why does the Tesla mobile app show power flows/values that appear inaccurate?

Ownership

What are the terms of the Powerwall warranty?
Where can I find Powerwall specifications?
Where can I find the Powerwall Owner's Manual and specification sheet for Powerwall?


Overview

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. 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.
  • 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.

Can Powerwall work without Internet?
Powerwall needs an Internet connection (over wired Ethernet or your home Wi-Fi) or a cellular connection to receive software updates and to communicate with the Tesla mobile app for energy monitoring. A reliable connection is required to provide new product features over time. If its connection is temporarily lost, Powerwall can continue to operate with its most recent settings, but it should not be installed in a location without Internet or cellular service.

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 go off-grid?
“Off-grid” can have different meanings:
If you are looking to be less reliant on your energy provider, Powerwall in the Self-Powered mode provides energy independence by using less grid power. This feature is available today.

If you are in a remote area without access to grid 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 discuss further.

Generator Integration

Does Powerwall work with existing battery systems?
Powerwall does not currently have the ability to work with existing battery systems. Please stay tuned for future updates.

I have a wind turbine/hydro turbine. Can I charge Powerwall with it?
Powerwall does not currently integrate with other renewable generation equipment. Please stay tuned for future updates.

Installations

What are the different components that make up a Powerwall system?
A Powerwall system consists of at least one Powerwall battery and a Gateway. The Gateway provides energy management, metering and monitoring functions for Powerwall. The Gateway also includes communication functions for up to 10 Powerwalls, and receives over-the-air updates for the system.

What does a Powerwall system look like with all the additional equipment installed?
A Powerwall installation includes at least one Powerwall battery, a Gateway and standard electrical hardware such as distribution boards, wire raceways, junction boxes or electrical disconnects as required by your particular installation and local electrical codes. In some cases, electrical hardware can be hidden within the wall for an additional cost.

What does a multiple Powerwall installation look like?
Multiple Powerwalls can be mounted as single side-by-side units on a wall or on the floor, or stacked front-to-back (up to 3 deep per stack) on the floor only. When mounted side-by-side on a wall, Powerwall units must have sufficient clearance on each side for electrical connections and proper ventilation.  When stacked front-to-back, Powerwalls must be floor-mounted, the stack must be anchored to an adjacent wall, and the Powerwalls must be joined together with Powerwall Stack Kit hardware.  For stacked systems with more than 3 Powerwalls, separate stacks of 3 units should be installed, with each stack attached to a wall.

What are the environmental requirements for a Powerwall installation?
Powerwall and Gateway units are rated for installation indoors or outdoors, and can operate within a wide range of temperatures, from -20°C to 50°C (-4°F to 122°F). At the high and low ends of this temperature range, Powerwall may limit charge or discharge power based on battery cell temperature to improve battery lifespan. To optimize performance, avoid installing Powerwall in locations exposed to direct sunlight or subject to sustained high or low temperatures.

While humidity and rain do not pose a risk, Powerwall should not be installed in locations subject to flooding or near water sources such as downspouts, faucets or sprinkler systems.  In order to maintain proper ventilation, Powerwall should be kept clear of debris such as leaves and dense brush, and of accumulated snow.

Functionality

How does Self-Powered mode work?
In Self-Powered mode, Powerwall charges from the excess solar energy generated during the day, and discharges to power your home at night.

When solar is producing more power than the home is using, Powerwall captures and stores that energy. When the home is consuming more energy than solar is providing, Powerwall discharges enough energy to offset the home usage. If solar is producing more than Powerwall can store, or the home needs more than Powerwall can provide, the remainder is automatically exported or imported from the grid respectively.

How can I monitor Powerwall operation?
As long as your Powerwall is connected to the Internet, you will be able to use the Tesla mobile app to monitor your home energy system in real time and view your energy usage history. If the Internet connection is lost, Powerwall will continue to operate with its most recent settings but you will not be able to monitor operation or change settings until connectivity is restored.

Can Powerwall charge from the grid?
Powerwall may utilise grid energy in extremely cold situations as its liquid thermal management system heats the battery cells to keep them in the optimum temperature range.

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.

Powerwall App

How do I download and set up the Tesla mobile app?
The Tesla app is available on the iTunes and Google Play stores. You can download the Tesla mobile app from your regular app store on your device.

Log in using your Tesla account information and you will see all your Tesla products in one place.

What is the Power Flow in the app?
Power Flow shows real time power generated from your solar system, stored/discharged by Powerwall, used by your home and exported/imported from the grid. It can be accessed from the Powerwall home screen. You will have real-time visibility into your home energy system.

How do I see energy usage history?
From the Power Flow screen, select any power source, or the bar chart icon on the top right, to access the graph page. From there you can select 'Today' to change the time period and access more data.

Is there a website where I can monitor my Powerwall from my desktop computer?
At this time, you can only monitor your system via the Tesla mobile app.

Why is my Powerwall not charging?
When installed with PV, Powerwall is designed to charge from solar energy. If your solar system is not yet operational, Powerwall will not be able to charge. If your solar system is operational Powerwall will charge with any excess solar that your home doesn't immediately use. Smaller solar systems sometimes do not produce more than your home is currently using.

For further help, contact Powerwall customer support.

Why does the Tesla mobile app show power flows/values that appear inaccurate?
Power flow shows the instantaneous flow of power of your home energy system. On a typical day a combination of solar, grid and Powerwall may be powering your home. Solar energy may flow to the grid when your home does not need it and Powerwall is full.

For further help, contact Powerwall customer support.

Ownership

What are the terms of the Powerwall warranty?
Powerwall comes with a 10-year unlimited cycle warranty with guaranteed energy retention level when used in Self-Powered or Backup mode. The warranty is available here.

Where can I find Powerwall specifications?
You can find the specifications for Powerwall here.

Where can I find the Powerwall Owner's Manual and specification sheet for Powerwall?
You can find the Owner's Manuals for Powerwall here.

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