How Does Tesla’s Powerwall Work?

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How Does the Tesla Powerwall Battery Work?

In a nutshell, Tesla’s Powerwall works with solar panels and gives you the ability to store the sun’s energy in a rechargeable home battery system.

Charging the Tesla Powerwall Battery

The Powerwall battery is charged with solar panels during the day.

When solar panels are producing more electricity than the home is consuming, it charges the Powerwall battery. If additional power is needed for the home, the home can get its electricity from the utility grid.

About the Powerwall Battery

The Powerwall battery can store up to 13.5 kWh. This energy is stored until the home needs it, such as when solar is no longer producing at night.

When the sun comes out the next morning, the solar panels start to recharge the Powerwall.

The Powerwall delivers clean, renewable energy with its batteries said to last 10 years with no maintenance.

Powerwall vs. Power Outages

When the utility grid is offline during a power outage, Powerwall will detect this and will automatically generate backup power by becoming the home’s main power source.

Monitor Your Powerwall System

Each Powerwall system works with an app on your phone to provide energy monitoring, metering, and smart controls to customize your Powerwall system.

Metering can help you accurately monitor your solar production and home energy consumption.

Powerwall’s Automatic Updates

The Powerwall system learns and adapts to your energy use over time and receives over-the-air updates to add new features and enhance existing ones.

Save Money with Powerwall

Powerwall is great at giving you automatic savings.

If your electricity rates vary throughout the day, Powerwall can charge the battery when your utility’s electricity costs are low. And, then it can discharge the battery when electricity costs are high.


Powerwall+ contains additional features focusing on solar integration that enable cleaner installations with less equipment.

Powerwall+ is able to intelligently power heavy equipment, and direct solar integration improves solar recharging during power outages, resulting in a better off-grid experience than ever before.

Scaling Up Your Powerwall System

A Powerwall system can be built with up to 10 Powerwalls, including a combination of Powerwall+ and traditional Powerwalls.