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About the Tesla Powerwall home battery
A solar battery is an important part of any home solar panel system. Once your solar panels have absorbed energy from the sun and your system has converted it into usable energy, your solar battery allows you to store that electricity. Then you can use it when the sun isn’t shining to avoid paying for electricity.
Tesla is known for its electric vehicles, but the company also creates other renewable energy systems, including solar batteries. The Tesla Powerwall is an integrated battery system that can store your solar energy. Included in every Tesla solar purchase, the Powerwall battery can help reduce your dependence on the traditional electricity grid. And since it entered the market, it’s become one of the leading solar batteries available today.
How much does the Tesla Powerwall cost?
The standalone cost of the Tesla Powerwall in 2021 is about $8,500, but there’s a catch. The company no longer sells the Powerwall individually to consumers — instead, you have to buy it as a part of a full home solar system. Combined with Tesla’s solar system, the Powerwall has a price tag of around $10,500, which includes installation and other soft costs.
Because you can’t buy the Powerwall as a standalone product, you’ll have to factor in the cost of the entire solar system. The price of a solar system can vary depending on your energy needs, but in general, you can expect to pay around $35,000 for your Tesla system. Keep in mind, however, that the 26 percent federal solar tax credit and other state and local incentives will reduce your overall costs considerably.
Tesla Powerwall tax credits and incentives
As we mentioned in the previous section, your purchase of a Tesla residential solar system is eligible for the federal Solar Investment Tax Credit (ITC). Using this tax credit, a consumer will currently receive 26 percent of their solar system purchase back. This tax credit can apply to your entire Tesla solar system purchase, including the Powerwall. Given the price of Tesla’s systems, you could expect to save more than $9,000 with the tax credit.
In addition to the federal tax credit, some state and local governments also have incentives in place to help people lower the cost of a solar panel purchase. You can learn more about tax incentives in your state by visiting your state’s solar page at the bottom of this guide.
Key specs and features of the Tesla Powerwall
When you purchase your Tesla home solar panel system, you’ll be able to choose between two different Powerwall models: the Powerwall and the Powerwall+. In this section, we’ll cover the specs of the two batteries and some important features.
- Battery capacity: Both the Powerwall and Powerwall+ have an energy capacity of 13.5 kilowatt-hours (kWh). This capacity is above average for a solar battery, which means it allows you to store more energy than many of its competitors. This factor is important, as it means you’ll be able to better power your home when the sun isn’t shining.
- Warranty: Most solar batteries come with a warranty that guarantees their effectiveness for a certain number of years. Both the Powerwall and Powerwall+ have a warranty of 10 years. During that time, Tesla promises that your battery will be free from defects and will maintain its 13.5 kWh energy capacity. If there’s a problem, Tesla will either repair, replace, or refund your Powerwall.
- Depth of discharge (DoD): The DoD of a solar battery refers to the amount of energy you can draw before impacting its lifespan. In most solar batteries, the DoD is less than 100 percent. But the Powerwall and Powerwall+ both have an impressive 100 percent DoD, meaning you can use the full amount of stored energy without shortening your battery’s lifespan.
- Round trip efficiency: The round trip efficiency of a battery describes how efficiently it runs during one cycle. Round trip efficiency is a percentage that describes how much of the power in the battery you can draw versus how much is needed to run the battery. The average solar battery efficiency is between 70 and 80 percent, but the Powerwall has an efficiency of 90 percent, meaning you can use more of the stored energy.
- Battery type: There are several types of solar batteries on the market, including lead-acid, lithium-ion, lithium-polymer, deep-cycle, saltwater, and solar gel. The Tesla Powerwall is a lithium-ion battery, which is a newer type of battery that often has a longer DoD, longer lifespan, and lower maintenance.
Should you buy the Tesla Powerwall?
The Tesla Powerwall is one of the top solar batteries on the market, and it’s easy to see why. It has plenty of advantages over the average solar battery. It has a solid lifespan and warranty, runs more efficiently than most competitors, and has a more impressive DoD.
But despite its advantages, the Powerwall also has some downsides. First, it’s one of the most expensive on the market. While the Powerwall has a price tag of $10,500 when you include installation costs, other solar batteries are available for half of that cost. Additionally, you can only buy the product from Tesla as a part of a full residential solar panel system.
When you’re deciding whether the Tesla Powerwall is right for you, there’s a lot to consider. But the most important factor is whether you want to buy a solar panel system from Tesla. You can’t buy the Powerwall as a standalone product, and it’s only available as a part of the full Tesla system. If you don’t want a Tesla solar system or already have a solar system installed, then you likely need to look elsewhere for your battery. We’ve rounded up a list of the best solar batteries on the market to help you find the perfect one.