Tesla Powerwall 3

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Last Updated on 27th June 2024


The Tesla Powerwall 3 - Key Features & Benefits

Introducing the Tesla Powerwall 3 - the latest iteration of Tesla's revolutionary home battery system which offers more power for whole home backup, ensuring that you're not left in the dark during power outages.

With the Powerwall 3, you can enjoy twice the power of its predecessor, allowing you to run more appliances simultaneously. Whether it's keeping your air conditioner running during a hot summer night or charging your electric car, this battery system is designed to handle it all. Plus, its robust design means it can be installed either inside or outside your home, making it a versatile solution for energy storage.

Along with the new intuitive features offered by Tesla, like Dynamic Tariff APIs and Dynamic Power Management for Wall Connectors, the Powerwall 3 could be your next step towards a more sustainable, self-sufficient home.


Overview of Tesla Powerwall 3

The Tesla Powerwall 3 elevates the standard for home battery systems, enhancing energy independence with state-of-the-art technology. Designed to harness solar power, it ensures your home remains powered even during outages, making sustainable living more accessible and reliable.

Key Features and Innovations

Tesla Powerwall 3 introduces several notable features and significant enhancements, contributing to its effectiveness and reliability:

Firstly, it possesses a remarkable storage capacity of 13.5 kWh, tailored to meet average daily consumption needs effectively. This large capacity enables you to enjoy a full day's power backup from a single charge.
An integrated solar inverter simplifies installations by eliminating the need for separate components, streamlining the solar setup, and boosting overall energy efficiency.
Another compelling innovation is its ability to support up to three different roof orientations simultaneously, thanks to the inclusion of three Maximum Power Point Trackers (MPPTs). This feature optimises solar energy collection throughout the day, offering greater flexibility in terms of installation preferences.
The Powerwall 3 also comes equipped with 'Storm Watch' functionality, which automatically prioritises energy storage in anticipation of severe weather, ensuring you remain powered during critical times.
Significantly higher maximum continuous discharge power of up to 11.5kW when compared with the Powerwall 2 [which only had 5kW], which allows you to power more appliances and rely less on the national grid.
A total of four Powerwall 3's can be installed in a home, which allows you to store more energy and deliver more power simultaneously.
Powerwall 3 is installed with a Backup Switch or Backup Gateway 2 to manage the system's connection to the grid and monitor home energy usage.

Powerwall 3 vs Powerwall 2

Tesla Powerwall 3 distinguishes itself significantly from its predecessor, offering advancements that enhance both performance and usability. Here are some key differences:

  • Unlike the Powerwall 2, which needs a separate solar inverter, the Powerwall 3 has a built-in high-efficiency solar inverter. This integration reduces installation costs, saves space, and boosts solar energy conversion efficiency.

  • The Powerwall 3 delivers a higher output with up to 11.5 kW continuous and 30 kW peak power capacities, doubling the Powerwall 2's capabilities. This increased capacity supports more appliances simultaneously, making it more suitable for larger homes or those with higher energy demands.

  • Powerwall 3 has a new intelligent cell-level heating architecture, allowing it to operate over a larger temperature range of –20°C to 50°C and supports the higher charge and discharge rates, which are pivotal when the battery is subjected to high load demands, whereas the Powerwall 2 employed an active cooling mechanism, which utilised a liquid system to regulate the temperature of the lithium-ion battery cells.

  • Powerwall 3 introduces advanced software integration compared to its predecessor, offering you a more intuitive user interface and smarter energy management features. In contrast, Powerwall 2, while still supported by Tesla's software ecosystem, does not offer the same level of integration or future-proof features.

FeaturePowerwall 2Powerwall 3Notes
Storage Capacity13.5 kWh13.5 kWhIdentical
Continuous Power Output5 kW11.5 kWPW3 has greater power output
Peak Power Output7 kW (10s)11.5 kWPW3 has higher peak power
Maximum Continuous Charge Power5 kW5 kWIdentical
Maximum Output Fault Current32 A10 kAHigher fault current for PW3
Load Start Capability106 A LRA185 A LRAHigher for PW3
ScalabilityUp to 10 unitsUp to 4 unitsPW2 has more expansion options
Round Trip Efficiency90%97.5%Higher efficiency for PW3
Overcurrent Protection Device30 A60 AHigher for PW3
Customer InterfaceTesla Mobile AppTesla Mobile AppIdentical
Warranty10 years10 yearsIdentical

Technical Specifications

Since we've looked at the differences between Powerwall 2 vs the Powerwall 3, let's explore the specifications in more detail that set this model apart in home energy solutions:

Energy Capacity and Efficiency

The Tesla Powerwall 3 offers an impressive energy storage capacity of 13.5 kWh. This capability ensures ample power availability for regular household needs and unexpected power outages alike. In terms of efficiency, the Powerwall 3 boasts a round-trip efficiency of 97%. This metric is crucial as it indicates how much energy put into the battery is usable after accounting for losses due to the conversion processes within the system.

Also, the Gateway acts as the central control unit, overseeing the flow of electricity from your solar panels, the grid, and the Powerwall battery itself. Its ability to direct power where it's needed most ensures that neither energy nor your money is wasted. Especially effective during peak sunlight hours, the Gateway maximizes the use of solar by adjusting the distribution of energy, storing excess power in the Powerwall for night-time use or during grid outages.

Compatibility With Solar Panels

Designed to seamlessly integrate with your solar array, Powerwall 3 enhances your home's energy system's efficiency. It accommodates a variety of solar panel setups and does not require any additional solar inverters. This compatibility optimizes direct current (DC) from the solar panels, which the Powerwall 3 then stores or converts for household use. It supports up to 20 kW DC of solar input, accommodating substantial solar installations.

Built-in Inverter Functionality

Powerwall 3 eliminates the need for a separate solar inverter thanks to its built-in hybrid inverter. This integration simplifies the installation process and reduces the overall footprint of your home energy system. The hybrid inverter efficiently shares duties with solar panels, ensuring that energy conversion is both swift and effective with minimal loss, further underscored by the system's robust continuous power output of 11.5 kW.


Installation and Setup

Installing the Tesla Powerwall 3 in your home brings energy independence and seamless integration with existing solar setups. This section explains how it ties into the broader energy system and the steps you’ll undergo to get it up and running:

Integration With Home Energy Only

The Powerwall 3 is designed for efficient integration with your home's energy system. With its built-in hybrid inverter, it directly connects to your existing solar panels without the need for separate hardware. This integration ensures that solar energy harvested during the day is easily converted, stored, and ready for use at any time, effectively turning your home into a personal microgrid.

As mentioned previously, Powerwall 3 has the ability to support multiple roof orientations which means it can accommodate diverse household layouts, ensuring maximum solar gain. Its smart features like 'Storm Watch' ensure that, in case of a forecasted storm, the battery automatically charges itself to full capacity, providing uninterrupted power supply during potential outages.

Requirements and Process

Before installation, there are several requirements you'll need to fulfil. Firstly, ensure your existing electrical systems are up to standard and can support the integration of the Powerwall 3. You’ll need an initial assessment by a certified Tesla Powerwall installer who will determine the compatibility of your home setup with the Powerwall’s specifications.

The installation process itself typically takes a few hours to a day, depending on the complexity of your home’s infrastructure. It usually involves:

1 Mounting the Powerwall unit on a wall or the ground, inside or outside – it’s designed to withstand diverse weather conditions.

2 Integrating the unit with your existing electrical and solar panel systems.

3 Setting up the Tesla app for real-time energy monitoring and management.

Once installed, the Tesla app allows you to customise your energy preferences, track usage patterns, and manage day-to-day energy operations to maximise efficiency and minimise costs.

Embracing the Powerwall 3 isn’t just about installation; it's about ushering a new era of energy use in your home, tailored to meet your energy needs and sustainability goals.


Environmental Benefits

The Tesla Powerwall 3 enhances your ability to utilise energy sustainably, significantly reducing environmental impact while increasing renewable energy integration.

Reduction in Carbon Footprint 🌍

  • Owning a Tesla Powerwall 3 contributes to a considerable decrease in your carbon footprint. This advanced battery system stores excess solar energy generated during peak sunlight hours, which you can use during the evening or cloudy days, minimising reliance on fossil-fueled power plants.

  • Typically, a solar energy setup, combined with a storage system like the Powerwall 3, cuts down on greenhouse gas emissions. Integrating battery storage with solar panels can reduce annual household carbon emissions which is pivotal in combating climate change and promoting a healthier environment.

Compatibility With Renewable Energy Sources ☀️

  • The Powerwall 3 is specifically designed to seamlessly work with various renewable energy sources, mainly solar power. It features a built-in hybrid inverter which simplifies the integration process, allowing your home to become a personal microgrid. This integration capability supports up to 20 kW DC of solar input, optimising energy harvest regardless of roof orientation.

  • The 'Storm Watch' feature maximises the utility of the stored energy during predicted high energy demand periods, ensuring you're tilising clean energy more effectively and consistently. With such a system, you're not just storing energy; you're ensuring that each ounce of power is generated and used in the most sustainable way possible.


Sources: Powerwall 3 Specifications, Powerwall 2 Datasheet

Frequently Asked Questions


When did Tesla release Powerwall 3?
In the UK, Powerwall 3 was released in June 2024 with with deliveries commencing in September 2024. Enhancing the capabilities of its home battery systems with more advanced features and improved integration with solar panel setups.

What is the difference between Tesla Powerwall 2 and 3?
The Powerwall 3 features a higher power output and an integrated hybrid inverter compared to its predecessor, though both share a 13.5 kWh capacity. Powerwall 3 supports more extensive solar inputs and offers new functionalities like Storm Watch, distinguishing it significantly from the Powerwall 2.

How many kWh is a Powerwall 3?
Powerwall 3 has a storage capacity of 13.5 kWh. It extends beyond merely storing energy by supporting up to 20 kW DC of solar input, and it features more sophisticated energy management and backup capabilities.