Connect with us

Hi, what are you looking for?

CleanTechnica
The largest single chunk of the cost of a Tesla is the battery, which also poses a single point of failure risk for Tesla owners. Buyers are typically not worried about an event-based failure, even though fires could certainly be a concern, but rather about the degradation of the battery over the life of the vehicle. With EV drivetrains expected to last much longer than their fossil fuel–fired counterparts, the life expectancy of the battery becomes a looming maintenance expense waiting to hit and has everyone asking, "How long will it last?"

Batteries

Show Me the Data: The Truth About Tesla Battery Degradation

The largest single chunk of the cost of a Tesla is the battery, which also poses a single point of failure risk for Tesla owners. Buyers are typically not worried about an event-based failure, even though fires could certainly be a concern, but rather about the degradation of the battery over the life of the vehicle. With EV drivetrains expected to last much longer than their fossil fuel–fired counterparts, the life expectancy of the battery becomes a looming maintenance expense waiting to hit and has everyone asking, “How long will it last?”

The largest single chunk of the cost of a Tesla is the battery, which also poses a single point of failure risk for Tesla owners. Buyers are typically not worried about an event-based failure, even though fires could certainly be a concern, but rather about the degradation of the battery over the life of the vehicle. With EV drivetrains expected to last much longer than their fossil fuel–fired counterparts, the life expectancy of the battery becomes a looming maintenance expense waiting to hit and has everyone asking, “How long will it last?”

Teslanomics took a crack at the question based on data pulled together from Tesla owners around the world. Before entering their data, drivers had to follow a very specific process for draining the battery and then charging it to ensure consistent results. Ben took the crowdsourced data and stubbed it into an excel sheet that he beautified with Tableau.

The resulting chart maps out battery capacity over time based on the mass of crowdsourced data and shows a clear trend. Battery capacities drop off a few percent within the first year and then stabilize at around 91% capacity in what looks to be a very stable curve across all samples. There are clear deviants above and below but no drastic outliers.

The analysis breaks out the data by most of the relevant factors one could wish for, including vehicle age, number of charges of the battery, vehicle mileage, and region.

These tests all make use of the commodity 18650 battery that has been the foundation for Tesla’s products since its inception. Moving forward, Tesla is migrating to the new 2170 cell that is believed to hit the sweet spot between cost, ease of manufacturing, energy density, weight, and performance. The 2170 will become the new foundational cell for all future Tesla products for the foreseeable future.

With the 2170 cell being optimized for electric vehicles — bundled with the improvements coming from the R&D side of the Tesla factory — battery degradation should continue to become less and less relevant over time as the technology evolves. Beyond that, the cost of batteries will continue to fall as the performance and longevity of batteries continues to improve, rendering concerns over battery life less and less relevant. (You may remember that there were similar concerns regarding Toyota Prius batteries back when the Prius was new.)

The cherry on top is that these trends will also drive the cost of Tesla products down. Whether that means we should expect a Tesla vehicle at half the price of the Model 3 or not in a few years is anyone’s guess … but I wouldn’t put it past them.

Check out the video below and let us know in the comments what you think the future holds for batteries.

 

Advertisement
 
Appreciate CleanTechnica’s originality? Consider becoming a CleanTechnica Member, Supporter, Technician, or Ambassador — or a patron on Patreon.
 
Have a tip for CleanTechnica, want to advertise, or want to suggest a guest for our CleanTech Talk podcast? Contact us here.

Written By

I'm a tech geek passionately in search of actionable ways to reduce the negative impact my life has on the planet, save money and reduce stress. Live intentionally, make conscious decisions, love more, act responsibly, play. The more you know, the less you need. As an activist investor, Kyle owns long term holdings in Tesla, Lightning eMotors, Arcimoto, and SolarEdge.

Comments

You May Also Like

Cars

With multiple crises raging (chips, batteries, covid, Ukraine war…), disruption is the order of the day, and one can say that anything goes right...

Autonomous Vehicles

Tesla is having AI Day #2 in a few months. CEO Elon Musk announced that Tesla would hold a second AI Day on August...

Batteries

Electric car prices, iconic electrified vehicles chauffeuring VIPs in Versailles, battery research, more sustainable battery components, and more — see the latest EV news...

Clean Transport

Tesla has opened its Supercharger network to five more countries in Europe. Last year, Tesla announced its Non-Tesla Supercharger pilot program, which allows EV...

Copyright © 2021 CleanTechnica. The content produced by this site is for entertainment purposes only. Opinions and comments published on this site may not be sanctioned by and do not necessarily represent the views of CleanTechnica, its owners, sponsors, affiliates, or subsidiaries.