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Top FAQs About The Tesla Powerwall

The ability to effectively store excess energy produced by solar panels is a big part of energy independence, and people who go solar want to be sure their power stays on when the grid goes down. 

While Tesla may be the biggest name in the lithium-ion solar energy storage game, there are still a lot of questions surrounding their integrated battery storage system. 

Let’s take a look at some of the most frequently asked questions about the Tesla Powerwall.

How Does the Tesla Powerwall Work?

The Tesla Powerwall works like other lithium-ion battery storage systems, however, the Powerwall is capable of storing more energy than other options on the market, giving you the ability to save more energy for use when needed.

How Much Does the Tesla Powerwall Cost?

When buying directly from Tesla, Powerwalls can run you anywhere between $9,200 and $14,200, but this is not yet a widely available option. If you buy from a local installer, you are looking at a total cost of $15,000 to $18,000. 

The Powerwall price per-unit drops — if you buy a Tesla solar system — with additional discounts depending on the number of Powerwalls you purchase, and let’s not forget about the Solar Investment Tax Credit (ITC) extension that can offset the cost of your new system by up to 30 percent.

What is the Lifespan of the Tesla Powerwall

Most solar batteries have a lifespan of 5 to 25 years, depending on factors like maintenance and the climate in which the system is located. The Tesla Powerwall has a 10 year warranty and guarantees 80 percent efficiency after 10 years.

Number of Tesla Powerwalls Hours of Backup Electricity (28 kWh/day)
One Powerwall
12 Hours of Power
Two Powerwalls
18 Hours of Power
Three Powerwalls
24 Hours of Power

What Can Be Powered With the Tesla Powerwall?

During an outage, the Tesla Powerwall is now capable of backing up your entire home from lights and small appliances to air conditioners and dryers. The duration of backup electricity on average depends on a few factors like how many Powerwalls you have and the average energy usage of your home. 

Based on the average home’s use of 28 kilowatt hours per day, the average amount of backup power without solar panels is as follows:

Is the Tesla Powerwall Worth it?

Yes, the Tesla Powerwall is a good investment. Though the initial price tag may seem staggering, it is relatively cheap when compared to the amount you will save over time and will pale in comparison to the sense of security you gain from becoming energy independent. Factor in longevity, low-cost maintenance, and helping the environment, and the decision is really a simple one. 


Whether you are looking to benefit from net metering or go completely off-grid, a solar panel system with backup battery storage is a good idea. The expert installation team at Gurr Brothers Energy is ready to help you get on the path to energy savings and independence!

Author: Hunter S.

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