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Tesla Powerwall 2 review - Specs, Performance & Cost

Tesla Powerwall 2

It's definitely frustrating when you’re relaxing at home, binge-watching your favorite show, and the power suddenly goes out or when you're in the middle of cooking dinner and your kitchen goes dark. That's why having a reliable home battery storage system isn't just a luxury—it can make all the difference. The Tesla Powerwall 2, a sleek, high-tech home battery that stores your solar energy, is a powerhouse that kicks in during outages, keeping your lights on and your devices running. Let’s see why the Powerwall 2 is a game-changer for home energy. 

Key Takeaways 

  • The Tesla Powerwall 2 stores 13.5 kWh of energy.

  • Offers a 10-year warranty with durable lithium-ion technology.

  • Easy installation by Tesla-certified installers.

  • High efficiency at 90% round-trip.

Tesla Powerwall 2 Overview

The Tesla Powerwall 2 is a home battery designed to store energy from your solar panels. It enables you to use stored solar power during the night or in the event of a power outage. You can say goodbye to relying on the grid and hello to lower electricity bills, all while keeping your home powered when the sun isn’t shining.

Tesla Powerwall 2 Specifications 

Energy capacity 

13.5 kWh

Continuous power output 


Peak power 



251 lbs


1150mm x 753mm x 147mm

Round trip efficiency


Depth of discharge 



Up to 10 units

Energy Capacity and Power Output

The 13.5 kWh capacity of the Powerwall 2 means it can store enough energy to power a typical home through the night. Its 5 kW continuous output ensures that your essential devices and appliances remain operational, while the 7 kW peak output can handle moments of high demand, such as when multiple devices are running simultaneously.

Battery Chemistry and Design

The Powerwall 2 uses advanced lithium-ion battery technology, known for its high energy density and longevity. It’s efficient at storing and discharging energy, all wrapped up in a tough, weather-resistant casing that’s perfect for both indoor and outdoor setups.


The Powerwall 2 delivers reliable and consistent performance, managing your daily energy needs without a hitch. It boasts a 90% round-trip efficiency, meaning you get to use most of the energy stored. With a 100% depth of discharge, you can tap into the entire battery capacity without cutting its life short.

Designed to work in temperatures from -20°C to 50°C, the Powerwall 2 keeps performing no matter the weather. Whether you’re in a scorching desert or a chilly mountain, it’s got your back. 


The Tesla Powerwall 2 is super flexible, letting you stack up to 10 units to meet your energy needs. Start with one and add more as you go, or install multiple units right off the bat. This makes it perfect for any home size, from cozy apartments to big houses with high energy demands. You get to customize your energy setup just the way you like it!

Lifespan and Durability

With a 10-year warranty, the Powerwall 2 is built to last. Its robust design and advanced battery management system ensure long-term durability and minimal maintenance. This longevity means you can rely on the Powerwall 2 for years, making it a sound investment in your home’s energy future.

Installation and Setup

Tesla Powerwall 2

Installation Process

Installing the Powerwall 2 involves connecting it to your home’s solar panels and electrical system. Only Tesla’s certified installers can handle the process, ensuring that everything is set up correctly and safely. The built-in inverter simplifies the installation, reducing the overall complexity and cost.

Compatibility with Existing Solar Systems

Whether you’ve got a brand-new solar setup or an older system, the Powerwall 2 fits right in. It seamlessly works with both new and existing solar installations, storing excess energy generated during the day for use at night or during grid outages. This integration not only optimizes the use of your solar panels but also ensures a consistent and reliable power supply, maximizing your return on investment. 

Maintenance Requirements

Thanks to its durable design and automated battery management system, the Powerwall 2 requires minimal maintenance. Regular checks by your installer can ensure that it continues to operate efficiently and reliably. This low-maintenance aspect is another reason why the Powerwall 2 is a popular choice for homeowners looking to optimize their solar energy systems.


Sure, the initial cost of the Powerwall 2 might make you gulp. A single unit runs about $7,500, and with installation and extra hardware, the total can hit $10,000 to $12,000. But think of it as a long-term investment in energy independence and sustainability. Over time, the Powerwall 2 saves you big bucks. By using stored solar energy, you cut your reliance on the grid, slashing your electricity bills. During peak hours, when rates skyrocket, you can draw power from your Powerwall instead. Its efficiency and lifespan mean you’ll see these savings for many years.

Our Honest Review 

The Tesla Powerwall 2 is an impressive piece of tech that truly delivers on its promises. Its large energy capacity and high efficiency make it a no-brainer for anyone looking to make the most of their solar setup. Plus, it’s pretty low-maintenance, which is always a bonus. You’ll see real savings on your electricity bills over time, making it a solid investment in the long run.

While the initial cost can be a bit of a shocker, there are government incentives to help offset the price and  they vary depending on where you live. Despite this, the Powerwall 2’s reliability, user-friendly design, and ability to perform in various weather conditions make it a top choice if you're serious about energy independence and cutting down on your utility costs.

Thinking about installing a Tesla Powerwall 2? As a certified Tesla installer, we can offer you a free quote today and help you start saving on your energy bills! Our expert team will provide you with all the information you need to make an informed decision. 


What is the capacity of the Tesla Powerwall 2?

The Tesla Powerwall 2 has a capacity of 13.5 kWh. This is enough to power a typical home through the night, storing excess solar energy generated during the day.

What are the installation requirements?

How does the Powerwall 2 compare to other battery systems?

Are there any government incentives available?

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