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Should You Leave Your Tesla Charger (UMC) Plugged In?
Should You Leave Your Tesla Charger (UMC) Plugged In?
The Model S, Model X and Model 3 comes with a home garage charger that contains a set of interchangeable plugs allowing owners to plug into nearly any power outlet. Whether you’re plugging your Tesla into a 240v NEMA 14-50 outlet or a traditional 110v wall socket, one question remains – should you leave the Tesla Charger or otherwise known as the Universal Mobile Connector (UMC) plugged into the wall?
The answer is yes, and here’s why:
- The Universal Mobile Connector (UMC) draws virtually no power when plugged in other than the green LED. Using a portable digital electricity monitor (a must have if you’re living the green lifestyle), we verified that the draw was less than 10 milliamps.
- You may not have the time to unplug and stow your UMC, especially if you’re on-the-go.
- Most Model S owners typically install the higher amperage NEMA 14-50 outlet (often used for washer/dryer machines) which uses a thick 4-prong plug. The plastic receptacle that receives the 4-prong plug is not designed to withstand the wear and tear of continuous plug insertion.
- Constant unplugging and re-plugging will loosen the receptacle thereby causing sag when the heavier UMC is attached to the outlet. We’ve encountered times where the sagging was enough to create a disconnect in power to our Tesla.
Also see: Tesla Model S Hidden Features, Tips, Tricks & Tidbits

News
Tesla Superchargers open to Hyundai’s EVs in the U.S.
Hyundai and Genesis are the latest brands to gain access to Tesla’s charging network.

Tesla’s Superchargers are now officially open to Hyundai’s electric vehicles (EVs) across the U.S., adding to the wave of auto brands that can now charge on the once-exclusive network.
In a press release on Tuesday, Hyundai announced that owners of the Kona electric, Ioniq hatchback, Ioniq 5, Ioniq 5 N, and Ioniq 6, can charge at Tesla Superchargers in the U.S. using a CCS to NACS adapter, which the company is offering complimentary to owners. The news is set to give access to roughly 20,000 Superchargers in the U.S., as Tesla continues to roll out access to non-Tesla EV brands across the industry.
Hyundai says that those who purchased their EVs prior to January 31, 2025 will begin receiving emails on how to claim the free NACS adapters starting the week of April 7. The news also comes after Hyundai was the first automaker to debut a native NACS port with the Ioniq 5, beginning late last year.
🚨 Starting today, U.S. owners of the current Hyundai KONA Electric, IONIQ Electric hatchback, IONIQ 5, and IONIQ 6 models equipped with a CCS port gain access to 20,000 Tesla Superchargers in the United States using an NACS adapter. pic.twitter.com/3xLfwCIXsc
— TESLARATI (@Teslarati) March 25, 2025
READ MORE ON HYUNDAI: Hyundai dives into the robotaxi business with TX-based startup
“Starting today, more Hyundai EV customers will have access to 20,000 Tesla Superchargers across North America, doubling their fast-charging options,” says Olabisi Boyle, Hyundai North America’s SVP of product planning and mobility strategy. “This move improves the public charging experience by giving our customers even more choice. It’s a vital part of our commitment to ease America’s transition to electric vehicle ownership.”
Currently, the news only applies to Superchargers in the U.S., though one spokesperson from the automaker told Teslarati that more details are expected to come about the launch of access in Canada later this year.
Tesla now lists Hyundai, and its subsidiary Genesis, on its website as EV brands that are able to charge at its Superchargers, along with several others which have been added in the past several months such as Polestar, Volvo, Mercedes-Benz, Lucid, and Rivian, among others.
Hyundai also had record auto sales in the U.S. in 2024, with general retail sales up 4 percent and EV sales up 13 percent year over year.
Hyundai prepares for Trump’s tariffs with billion-dollar investment in the United States
Elon Musk
Tesla CEO Elon Musk’s simple message to vandals

Tesla CEO Elon Musk had a simple and straightforward message to the vandals who continue to damage cars, showrooms, and Superchargers that the company and its owners utilize during an All-Hands meeting last week.
For the first time, Tesla and Musk broadcasted on X an All-Hands meeting the company held with its employees.
It seemed to be a justified response to skeptics and investors who have said that Musk has spent more time worrying about the Department of Government Efficiency (DOGE) than Tesla.
During the meeting, Musk showed the company’s roadmap for the remainder of 2025 and into 2026 and aimed to resolve any sort of skepticism regarding his commitment. He told the employees to “hang onto their stock,” and commented on Tesla’s future impact:
“It’s very difficult like for people in the stock market, especially those that look in the rearview mirror — which is most people — to imagine a future where suddenly a 10 million vehicle fleet has five to ten times the usefulness. It’s so profound and there’s no comparison with anything in the past that it does not compute. But it will compute in the future.”
However, Musk did not stop there. He also had a message for those who have gone out of their way to key, damage, and sometimes even destroy Tesla vehicles and showrooms.
Several locations have been hit with gunfire, Molotov cocktails, and other things, while owners are reporting petty vandalism like keying and slashing tires more frequently now than ever.
Musk’s message to the vandals was simple:
“This is psycho. Stop being psycho!”
He continued:
“If you read the news, it feels like, you know, Armageddon. It’s like, I can’t walk past the TV without seeing a Tesla on fire. Like, what’s going on? Some people, it’s like, listen, I understand if you don’t wanna buy our product, but you don’t have to burn it down. That’s a bit unreasonable.”
Tesla’s biggest haters have continued to spew violence toward the company and owners of its cars, with some even putting on bumper stickers that read things like “I bought this before Elon went crazy!” to hopefully divert attackers.
🚨 We spotted this Tesla with “I bought this before Elon went crazy” and “Anti-Elon Social Club” bumper stickers on.
Gimme a break.
Do you think these are legitimate beliefs or an attempt at stopping people from vandalizing their cars? pic.twitter.com/hTDFVTvAvj
— TESLARATI (@Teslarati) March 24, 2025
The company also has the help of the federal government. The FBI has already established a task force to help investigate instances of vandalism and violence against Tesla. Additionally, President Trump has said attacks against the company are being considered as domestic terrorism.
News
Tesla China seems to have overtaken Q1 2024’s registrations with new Model Y ramp
During the week of March 17-23, Tesla China saw 17,400 new vehicle registrations.

The new Model Y’s ramp is resulting in a strong comeback for Tesla in China. This was highlighted by the momentum of Tesla’s new vehicle registrations in the country.
With the new Model Y now starting deliveries, Tesla China’s year-to-date registrations appear to have surpassed the company’s 2024 numbers in the same period.
Tesla China Registrations
During the week of March 17-23, Tesla China saw 17,400 new vehicle registrations, the highest this Q1 2025 so far. This represents a 13.7% increase from the previous week. With these results, industry watchers have noted that Tesla China’s insurance registrations are now up 28.2% year-over-year.
Tesla China’s new vehicle registrations have seen a notable rise this March as the company started deliveries of the new Model Y to domestic customers. In the week ending March 2, Tesla China saw 12,400 registrations. In the week ending March 9, the number rose to 13,800, and in the week ending March 16, registrations rose once more to 15,300 vehicles.
Overtaking Q1 2024
As per industry watchers, Tesla is estimated to have seen 116,200 new vehicle registrations in China as of the week ending March 23, 2025. In the same period in 2024, Tesla China was estimated to have seen 115,900 new vehicle registrations–and that’s with the new Model Y having just a few weeks’ worth of domestic deliveries.
Time for a Comeback
The new Model Y has been making quite a big impact on China’s domestic automotive market. Previous reports indicate that the revamped all-electric crossover completely dominated the premium all-electric SUV segment in China last week with 9,451 sales, far ahead of the 1,390 units that were sold by its closest competitor, the Zeekr 7X.
In the week ending March 23, 2025, estimates suggest that Tesla China saw 10,628 registrations for the new Model Y. Such numbers could result in the vehicle ranking very well in China’s premium all-electric SUV segment once more.
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