Energy Support

Powerwall System Design

A Powerwall system consists of at least one Powerwall battery and a Backup Gateway or a Backup Switch. Powerwall, in conjunction with a Backup Gateway or Backup Switch, will power the home during a grid outage. When the system is installed with solar, Powerwall stores solar energy produced to power the home when the sun isn’t shining.

Typical System Design

The Powerwall system configuration installed at your home may vary, depending on:

  • The size of your solar system
  • The model of your Powerwall
  • How many Powerwalls you have purchased with solar


Note: Installation should only be performed by Tesla or a Tesla Certified Installer. 

Powerwall 3 System Configurations

Powerwall+ System Configurations

Powerwall 2 System Configurations

Other System Designs

A service that is greater than 200 A can be backed up using one of two methods. For whole home backup, we will split the service into multiple systems of 200 A increments and install a Backup Gateway and Powerwall(s) for each system. If the service cannot be split into two systems, then one Backup Gateway will be used to back up as much of your home’s service as possible, up to a 200 A limit, and considering site-specific installation complexities.

The diagram below depicts a 400 A service split into two 200 A systems.

System Components

There are many variables such as climate, home orientation and energy use goals, that make each home unique. For a final detailed recommendation on system design, talk to your Tesla Advisor or a Tesla Certified Installer. Typically, your Powerwall system consists of:

Powerwall 3, Powerwall+ or Powerwall 2

Powerwall 3 features an integrated solar inverter allowing solar to be connected directly for high efficiency. With a higher power output, it can provide whole home backup to most homes and support larger solar systems.

Powerwall+ combines Powerwall 2 with an integrated solar inverter, to power the home or store for later use. Powerwall+ can be installed with other Powerwall 2 batteries.

Powerwall 2 is capable of being added to existing solar systems and is compatible with all major inverter brands. Powerwall 2 can be installed with other Powerwall+ batteries.

Backup Gateway or Backup Switch

Backup Gateway controls system operation, detects grid outages, enables backup power from the battery and functions as a site meter. Backup Gateway may be installed in whole home or partial home backup systems.

Backup Switch detects grid outages, enables backup power from the battery and functions as a site meter. Backup Switch is installed in whole home backup systems. Tesla Backup Switch may not be approved by some utilities.

Tesla Solar Inverter

Tesla Solar Inverter converts DC power from solar to AC power for home consumption. Tesla Solar Inverter can be installed with Powerwall 2. Powerwall 3 and Powerwall+ have an integrated solar inverter.

Additional Electrical Hardware

Additional electrical hardware includes electrical panels, conduit, disconnects, meters and more. These are installed based on site needs and code requirements.