• Home
  • Latest
  • Fortune 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia

Trendingnow

1

Jeff Bezos wants the bottom half of earners to pay zero income tax—he says nurses making just $75K should save $12K a year

2

Despite a $500 million net worth, Shaq just finished his fourth degree. He warns graduates: 'Your character will take you further than your resume'

3

Bolt CEO says he let go of his entire HR team for creating problems that didn’t exist: ‘Those problems disappeared when I let them go’ 

1

Jeff Bezos wants the bottom half of earners to pay zero income tax—he says nurses making just $75K should save $12K a year

2

Despite a $500 million net worth, Shaq just finished his fourth degree. He warns graduates: 'Your character will take you further than your resume'

3

Bolt CEO says he let go of his entire HR team for creating problems that didn’t exist: ‘Those problems disappeared when I let them go’ 
TechElon Musk

Musk Is Now Taking Shots at Major Tesla Supplier Panasonic

By
Bloomberg
Bloomberg
Down Arrow Button Icon
By
Bloomberg
Bloomberg
Down Arrow Button Icon
April 22, 2019, 4:44 PM ET
US-SPACE-AEROSPACE-SPACEX
Tesla CEO Elon Musk has Panasonic in his crosshairs. JIM WATSON AFP/Getty ImagesJim Watson—AFP/Getty Images

Elon Musk has engaged in Twitter spats with a long line of folks, from rival automakers to short sellers and the Securities and Exchange Commission.

He’s at it again, but this time the stakes could be even higher. He’s in a rare public dispute with a critical supplier: Panasonic Corp., the company that makes all of the lithium-ion battery cells that power Tesla Inc.’s electric vehicles.

The rift started with reports the companies are tempering expansion plans at their jointly operated battery plant near Reno, Nevada. Musk shot back in tweets that Panasonic is the culprit by operating at a pace that’s constrained the production of Tesla’s Model 3 sedan.

Even by Musk’s standards, it’s highly unusual for a company and its largest supplier to duel so openly. And the tiff once again raises questions about Tesla’s ability to sustain profitability amid concerns about demand. Tesla delivered just 63,000 cars globally in the first quarter, compared with almost 91,000 in the previous three months. Panasonic’s apparent reluctance to boost battery production only adds to the skepticism — and it may portend greater troubles.

“Tesla and Panasonic need couples counseling ASAP,” said Craig Irwin, an analyst at Roth Capital Partners. “This is looking like a much more acrimonious relationship.”

Tesla shares fell 1.9 percent to $268.12 shortly after the open of regular trading Monday. The stock has slumped 19 percent this year.

Read more on Tesla Musk to hype autonomy before posting quarterly loss Evercore ISI analyst cuts rating on Tesla to sell Tesla, NIO investigating car fires in China Short seller is accused of menacing Tesla workers Board shakeup seen as an important step for governance

Odd Couple

Tesla and Panasonic have been joined at the hip since the gigafactory agreement was first announced in July 2014, even if on paper they’re a bit of an odd couple. One is a 16-year-old maker of electric vehicles run by an impetuous boss, the other a century-old conservative Japanese manufacturer.

Tesla manages the gigafactory but Panasonic is the principal partner, responsible for churning out cylindrical lithium-ion battery cells that Tesla buys and then packages into battery packs for the Model 3 sedan. The goal was to produce 35-gigawatt hours, or GWh, of cells per year by 2020, enough for roughly 400,000 Model 3s.

But two weeks ago, Osaka-based Panasonic shocked the investment community when the Nikkei newspaper reported that Tesla and Panasonic were freezing plans to expand capacity beyond the initial 35GWh amid concerns about Tesla’s sales.

“Panasonic is a 101-year-old company,” said Chris Redl, senior portfolio manager at Gordian Capital Japan. “It’s extremely rare for a Japanese company to publicly air its grievances about a top customer via a story in the Nikkei.”

Production Capacity

Musk said that Panasonic’s cell lines have actually constrained Model 3 assembly because they are operating at just two-thirds capacity or 24GWh.

Panasonic did not directly respond to that assertion. But it said in a statement this week that as of the end of March, the plant does have the capacity for 35GWh. Both companies are in agreement that the gigafactory is far from running at full production. What’s less clear is why and how they will proceed in the future.

“Tesla won’t spend money on more capacity until existing lines get closer to 35GWh theoretical,” Musk said in a tweet.

Third Party

Most analysts said they believe slow Tesla sales warranted capping battery-production lines. But another explanation offered up is that Panasonic is unhappy about a third party possibly messing up their marriage. While it is currently Tesla’s only supplier of automotive-grade batteries, Tesla is building another factory in Shanghai and has talked with several Chinese-based suppliers, including CATL.

“Tesla is starting to flirt with other battery makers in China, and Panasonic doesn’t like that,” said Sam Jaffe, managing director of battery consulting firm Cairn ERA.

Tesla declined to comment beyond Musk’s tweets. It has warned investors that it expects first-quarter net income will be negatively impacted by lower-than-projected vehicle deliveries and multiple price cuts. Tesla is having an Autonomy Investor Day at its headquarters in Palo Alto, California, on Monday and will report earnings April 24.

Past Problems

This isn’t the first time the two companies have struggled to match production lines. In a November interview with Bloomberg, Panasonic President Kazuhiro Tsuga said that in 2017, Panasonic held back while Tesla worked through problems in its automation line. Then in 2018, as car output ramped up, it was Panasonic who lagged. Tsuga said the output on both sides was close to being evenly matched in early November, and two additional cell-production lines would be added.

The two companies are intertwined to a degree that any permanent split is likely out of the question, Roth Capital’s Irwin said. Panasonic needs Tesla for the stability it brings to its battery business, he said, while “Tesla has nothing in batteries without Panasonic.”

Still, the now-public rift shows how Panasonic may be worried about Tesla’s future, said Kazunori Ito, an analyst at Morningstar Investment Services in Tokyo.

“With EV sales not growing as expected, Panasonic is increasingly unwilling to take risks,” Ito said. “Where it used to be two companies sharing a common destiny, it’s clear that Panasonic wants to distance itself from Tesla, and Tsuga is beginning to draw a line. Musk cannot be happy about that.”

About the Author
By Bloomberg
See full bioRight Arrow Button Icon

Latest in Tech

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025

Most Popular

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Fortune Secondary Logo
Rankings
  • 100 Best Companies
  • Fortune 500
  • Global 500
  • Fortune 500 Europe
  • Most Powerful Women
  • World's Most Admired Companies
  • See All Rankings
  • Lists Calendar
Sections
  • Finance
  • Fortune Crypto
  • Features
  • Leadership
  • Health
  • Commentary
  • Success
  • Retail
  • Mpw
  • Tech
  • Lifestyle
  • CEO Initiative
  • Asia
  • Politics
  • Conferences
  • Europe
  • Newsletters
  • Personal Finance
  • Environment
  • Magazine
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Fortune Brand Studio
  • Fortune Analytics
  • Fortune Conferences
  • Business Development
  • Group Subscriptions
About Us
  • About Us
  • Press Center
  • Work At Fortune
  • Terms And Conditions
  • Site Map
  • About Us
  • Press Center
  • Work At Fortune
  • Terms And Conditions
  • Site Map
  • Facebook icon
  • Twitter icon
  • LinkedIn icon
  • Instagram icon
  • Pinterest icon

Latest in Tech

How Grab’s CTO sees the superapp’s push into physical AI and automated driving—and why he uses his competitors’ robots in the office
AITransportation
How Grab’s CTO sees the superapp’s push into physical AI and automated driving—and why he uses his competitors’ robots in the office
By Angelica AngMay 22, 2026
6 hours ago
Trump AI and crpto czar David Sacks sits next to Meta CEO Mark Zuckerberg at a dinner table in the White House as Zuckerberg turns to Sacks and says something.
AIAmerican Politics
Tech billionaires convinced Trump to back off an AI executive order. But much of MAGA favors AI regulation
By Jeremy KahnMay 22, 2026
7 hours ago
James Daunt sits in a booksop, gesturing with both hands and smiling.
AIbooks
Barnes & Noble CEO clarifies the bookseller’s stance on AI-written books after refusing to ban them: ‘This is a straightforward rejection of AI books’
By Sasha RogelbergMay 22, 2026
8 hours ago
A photo taken during the Maroon Bells bicycle ride during Fortune Brainstorm Tech 2019 in Aspen, Colorado. (Photo: Fortune)
InnovationBrainstorm Tech
Fortune Brainstorm Tech 2026 will be brilliant
By Andrew NuscaMay 22, 2026
9 hours ago
satya nadella
AITech
Microsoft reports are exposing AI’s real cost problem: Using the tech is more expensive than paying human employees
By Jake AngeloMay 22, 2026
10 hours ago
Sam Altman standing in a lift.
AIOpenAI
The big questions looming over OpenAI’s trillion-dollar IPO
By Beatrice NolanMay 22, 2026
10 hours ago

Most Popular

Jeff Bezos wants the bottom half of earners to pay zero income tax—he says nurses making just $75K should save $12K a year
Success
Jeff Bezos wants the bottom half of earners to pay zero income tax—he says nurses making just $75K should save $12K a year
By Preston ForeMay 21, 2026
2 days ago
Despite a $500 million net worth, Shaq just finished his fourth degree. He warns graduates: 'Your character will take you further than your resume'
Success
Despite a $500 million net worth, Shaq just finished his fourth degree. He warns graduates: 'Your character will take you further than your resume'
By Preston ForeMay 20, 2026
3 days ago
Bolt CEO says he let go of his entire HR team for creating problems that didn’t exist: ‘Those problems disappeared when I let them go’ 
Workplace Culture
Bolt CEO says he let go of his entire HR team for creating problems that didn’t exist: ‘Those problems disappeared when I let them go’ 
By Preston ForeMay 19, 2026
3 days ago
Pay transparency is exposing a bigger problem: Most companies can't explain why they pay what they pay
Workplace Culture
Pay transparency is exposing a bigger problem: Most companies can't explain why they pay what they pay
By Sydney LakeMay 20, 2026
2 days ago
Indeed chief economist says we’re entering an era of ‘great mismatch’ thanks to a generational imbalance of workers
Success
Indeed chief economist says we’re entering an era of ‘great mismatch’ thanks to a generational imbalance of workers
By Emma BurleighMay 22, 2026
12 hours ago
McKinsey partner says up to 50% of work hours could be transformed within the next 5 years
AI
McKinsey partner says up to 50% of work hours could be transformed within the next 5 years
By Emma BurleighMay 21, 2026
1 day ago

© 2026 Fortune Media IP Limited. All Rights Reserved. Use of this site constitutes acceptance of our Terms of Use and Privacy Policy | CA Notice at Collection and Privacy Notice | Do Not Sell/Share My Personal Information
FORTUNE is a trademark of Fortune Media IP Limited, registered in the U.S. and other countries. FORTUNE may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.