First seen Cybertruck charging curve disappoints, but is that the whole story?
The Tesla Cybertruck, Tesla’s first vehicle to fully utilize its larger 4680-format cell, has been out for about a month now. But with only limited quantities on the road in the public’s hands, there have still been a lot of questions about the vehicle.
Now we’ve got an answer to one of the most important questions: charge rate. It’s not great – but that might not be the whole story.
Peak charging speed, measured in kilowatts or kW, is one of the most important stats on an EV – arguably much more important than range. The higher the charge rate the quicker you can get back on the road during a charging session. Older EVs have DC charge rates around 50kW, which is quite slow compared to today’s standards, where EVs are usually capable of 150kW+, with some models capable of up to 350kW. Tesla’s V3 superchargers can deliver up to 250kW of power, which is plenty fast, though the new V4s are even faster at 350kW.
But another important aspect of charging is charge curve, or how quickly a vehicle “tapers” off of the peak charge rate to a lower one. EVs can’t sustain peak charge rates forever, so will usually only hold on to the peak rate for a certain period of time before lowering to a slower rate. This is why EVs usually state their DC charge time “to 80%,” because charging past 80% at a high rate is generally bad for battery durability.
Until now, this was an open question for the Cybertruck, especially since it is Tesla’s first car to fully utilize the 4680-format cells which have been noted to have somewhat worse charging performance than the previous 2170 format cells.
Video of Cybertruck’s charging curve
But in a video posted by Our Cyber Life, a new youtube channel formed by a couple who took delivery of their Cybertruck two weeks ago, we now know what the Cybertruck’s charge curve looks like. The channel’s videos so far have fully focused on the Cybertruck ownership experience, from a couple who have never owned a Tesla before (but one of them, nevertheless, seems to be a Tesla employee – which explains the early Cybertruck delivery).
The video fully documents a Cybertruck charge at the Tesla supercharger in Mesa, Arizona, a V3 Supercharger capable of 250kW peak power delivery. Most of the video is just a 5x speed timelapse of the screen during the charging session, though Our Cyber Life helpfully included graphs showing charge rate for those who are “not interested in watching paint dry.”
As we can see in the video and accompanying graphs, the Cybertruck seems to have a relatively poor charge curve, at least for this charging session at a busy V3 Supercharger. The car starts at 14% state of charge, after about 20 minutes of preconditioning (an automatic process to raise battery temperature to accept higher charge rates).
It immediately jumps to a peak charge rate of 255kW, but starts to taper quite rapidly, with charge rate gradually decreasing starting at 20% SOC. By 40% SOC the car is down to 150kW, 100kW at 60% SOC, and reaches a plateau of 75-80kW at about 66% SOC, which it holds until around 90% – when the Youtuber’s camera died and the Cybertruck headed out.
All in all, it was a 50 minute charge session from 14-90%, adding 94kWh worth of energy into the Cybertruck’s 123kWh battery. Or, using the standard 80% cutoff, 14-80% took 40 minutes.
Brief comparison with other vehicles
Tesla vehicles do tend to taper rather early, but make up for it with high peak charge rates. It’s usually better to do more frequent, shorter charge sessions to take advantage of higher charge rates at low SOC, rather than to charge all the way up to 90 or 100%. Plus, busy Superchargers will penalize you for sticking around too long while others are waiting for a charge.
This is still a reasonably quick charge rate, especially when compared to the early days of EV charging or compared to AC charge times which run in the hours, not minutes.
But given the Cybertruck’s huge 123kWh battery, we expected quicker charging than this. A larger battery can usually sustain a higher charge rate for longer (this concept is known as “C-rate,” or charge rate divided by total capacity). A Model 3 Long Range has a peak C-rate of 3 and average C-rate of 1.4 when charging from 0-100%, but in this test, the Cybertruck showed a peak C-rate of just over 2 and average of about .9.
Measured in “miles of charge added per minute,” which is an even more important metric for practical driving purposes, the picture gets somewhat worse for the Cybertruck. The Model 3 is rated at 333 miles of range, and from 14-80% can add about 220 miles of range in 31 minutes. By the same metric, from 14-80%, the Cybertruck added 206 miles in 40 minutes – less range in a longer period of time.
All of these are significantly slower than the current charging champions, the Hyundai Ioniq 5 and its cousin the Kia EV6, which despite a slightly lower peak charge rate of around 230kW, have an impressively broad charging curve that can sustain speeds of 170-180kW all the way up to 70-80%.
And compared to a similar-ish vehicle, the Rivian R1T, the R1T tapers a little bit later, but not by a tremendous amount. The R1T wins here, but by a small margin (a margin which becomes larger when taking into account Rivian’s higher efficiency and Tesla’s traditional, uh, “optimistic” range estimates).
But that’s not the whole story
However, we need to caution that this is only one test in one set of circumstances – and the circumstances are less than ideal for the Cybertruck in question.
First, the Cybertruck’s charging system is built with the ability to switch between 800-volt and 400-volt charging. V3 Superchargers are 400V, so it’s possible that the Cybertruck will be able to charge better from an 800V charger – if Tesla gets around to installing them. The V4 Supercharger is supposed to be capable of 800V charging, but so far we’ve only seen 400V installs, showing how Tesla’s charging network isn’t ready for Cybertruck – and that’s true in more ways than one.
Second, it was a busy Supercharger, and on busy Superchargers sometimes Tesla limits charging speed. A Supercharger station won’t necessarily be built with the ability to give maximum 250kW power to every stall at the same time, because you’re rarely going to have every stall full with a car at 0% SOC calling for maximum charge rate. So a 10-stall, 250kW charger might have a total 1-1.5MW capacity, instead of the 2.5MW you’d expect from the nameplate 250kW charge rate. It is possible the Cybertruck was given max charge rate at low SOC, and then the station itself tapered off power delivery in order to prioritize lower-SOC vehicles at the station.
Finally, this is a brand-new vehicle and Tesla may be waiting for more data on battery health while charging, in order to potentially increase charge rates in the future. Tesla is fond of offering over-the-air updates to improve vehicle capabilities, and to allow early owners to act as beta testers. In this case, the owner in question is also a Tesla employee, and Tesla is even more willing to use employees as guinea pigs on new vehicles. So it’s entirely possible that charge rates might increase in a future software update – as happened with Rivian as well.
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Environment
EcoFlow members can save up to 65% on power stations while supporting disaster relief during the 2025 Member’s Festival
Portable power station specialist EcoFlow is kicking off its third annual Member’s Festival this month and is offering a unique new rewards program to those who become EcoFlow members. The 2025 EcoFlow Member’s Festival will offer savings of up to 65% for its participating customers, and a portion of those funds will be allocated toward rescue power solutions for communities around the globe through the company’s “Power for All” fund.
EcoFlow remains one of the industry leaders in portable power solutions and continues to trek forward in its vision to power a new tech-driven, eco-conscious future. Per its website:
Our mission from day one is to provide smart and eco-friendly energy solutions for individuals, families, and society at large. We are, were, and will continue to be a reliable and trusted energy companion for users around the world.
To achieve such goals, EcoFlow has continued to expand its portfolio of sustainable energy solutions to its community members, including portable power stations, solar generators, and mountable solar panels. While EcoFlow is doing plenty to support its growing customer base, it has expanded its reach by giving back to disaster-affected communities by helping bolster global disaster response efforts the best way it knows how– with portable power solutions.
EcoFlow and its members look to provide “Power for All”
Since 2023, EcoFlow has collaborated with organizations worldwide as part of its “Power for All” mission. This initiative aims to ensure access to reliable and timely power to disaster-affected communities across the globe, including rescue agencies, affected hospitals, and shelters, to support rescue and recovery efforts.
This fund most recently provided aid for communities affected by the recent Los Angeles wildfires, assistance to the Special Forces Charitable Trust (SFCT) in North Carolina following severe hurricanes, and support for non-profits engaged in hurricane preparedness in Florida and the Gulf Coast. Per Jodi Burns, CEO of the Special Forces Charitable Trust:
In the wake of devastating storms in Western North Carolina, reliable power was a critical need for the families we serve. Thanks to EcoFlow’s generous donation of generators, we were able to provide immediate relief, ensuring these families and their communities had access to power when they needed it most. We are so impressed with EcoFlow’s commitment to disaster response through their ‘Power for All’ program. It has made a tangible impact, and we are deeply grateful for their support and partnership in helping these families recover and rebuild.
In 2024, the US experienced 27 weather and climate events, each causing losses exceeding $1 billion, marking the second-highest annual total on record, according to National Centers for Environmental Information. The increasing frequency and severity of natural disasters underscore the critical need for reliable and timely power solutions during emergencies, much like EcoFlow and its members are helping provide through the “Power For All” initiative.
To support new and existing EcoFlow members, the company is celebrating its third annual Member’s Festival throughout April to offer a do-not-miss discount on its products and donate a portion of all sales to the “Power for All” fund to provide rescue power to those in need in the future. Learn how it all works below.
Save big and give back during the 2025 Member’s Festival
As of April 1st, you can now sign up to become an EcoFlow member to participate in the company’s exclusive 2025 Member Festival.
As a member, you can earn “EcoFlow Power Points” by completing tasks like registration, referrals, and product purchases and tracking your individual efforts toward disaster preparedness and recovery.
Beginning April 4, EcoFlow members will also be able to take advantage of exclusive discounts of up to 65% off select portable power stations, including the DELTA Pro Ultra, DELTA Pro 3, DELTA 2 Max, DELTA 3 Plus, RIVER 3 Plus, and more. However, these sale prices only last through April 25, so you’ll want to move quickly!
Click here to learn more about EcoFlow’s “Power for All” campaign. To register for EcoFlow’s 2025 Member Festival in the US, visit the EcoFlow website. To register as a member in Canada, visit here.
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Tesla is losing another top talent: its long-time head of software, David Lau, has reportedly told co-workers that he is exiting the automaker.
Tesla changed how the entire auto industry looks at software.
Before Tesla, it was an afterthought; user interfaces were rudimentary, and you had to go to a dealership to get a software update on your systems.
When Tesla launched the Model S in 2012, it all changed. Your car would get better through software updates like your phone, the large center display was responsive with a UI that actually made sense and was closer to an iPad experience than a car.
Tesla also integrated its software into its retail experience, service, and manufacturing.
David Lau deserves a lot of the credit for that.
He joined Tesla in 2012 as a senior manager of firmware engineering and quickly rose through the ranks. By 2014, he was promoted to director of firmware engineering and system integration, and in 2017, he became Vice President of software.
Lau listed the responsibilities of his team on his LinkedIn:
- Vehicle Software:
- Firmware for the powertrain, traction/stability control, HV electronics, battery management, and body control systems
- UI software and underlying Embedded Linux platforms
- Navigation and routing
- iOS and Android Mobile apps
- Distributed Systems:
- Server-side software and infrastructure that provides telemetry, diagnostics, over-the-air updates, and configuration/lifecycle management
- Data engineering and analytics platforms that power technical and business insights for an increasingly diverse set of customers across the company
- Diagnostic tools and fleet management, Manufacturing and Automation:
- Automation controls (PLC, robot)
- Server-side manufacturing execution systems that power all of Tesla’s production operations
- Product Security and Red Team for software, services, and systems across Tesla
Bloomberg reported today that Lau told his team he is leaving Tesla. The report didn’t include reasons for his stepping down.
Electrek’s Take
Twelve years at any company is a great run. At Tesla, it’s heroic. Congrats, David, on a great run. You undoubtedly had a significant impact on Tesla and software advancements in the broader auto industry.
He is another significant loss for Tesla, which has been losing a lot of top talent following a big wave of layoffs around this time last year.
I wonder who will take over. Michael Rizkalla, senior director of software engineering and vehicle firmware, is one of the most senior software engineers after Lau. He has been at Tesla for 7 years, and Tesla likes to promote within rather than hire outsiders.
There are also a lot of senior software execs working on AI at Tesla. Musk has been favoring them lately and he could fold Lau’s responsibilities under them.
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Kia’s electric SUVs are taking over. The EV3 is the best-selling retail EV in the UK this year, giving Kia its strongest sales start since it arrived 34 years ago. And it’s not just in the UK. Kia just had its best first quarter globally since it started selling cars in 1962.
Kia EV3 is the best-selling EV in the UK through March
In March, Kia sold a record nearly 20,000 vehicles in the UK, making it the fourth best-selling brand. It was also the second top-seller of electrified vehicles (EVs, PHEVs, and HEVs), accounting for over 55% of sales.
The EV3 remained the best-selling retail EV in the UK last month. Including the EV6, three-row EV9, and Niro EV, electric vehicles represented 21% of Kia’s UK sales in March.
Kia said the EV3 “started with a bang” in January, darting out as the UK’s most popular EV in retail sales. Through March, Kia’s electric SUV has held on to the crown. With the EV3 rolling out, Kia sold over 7,000 electric cars through March, nearly 50% more than in Q1 2024.
The EV3 was the best-selling retail EV in the UK in the first quarter and the fourth best-selling EV overall, including commercial vehicles.
Starting at £33,005 ($42,500), Kia said it’s the “brand’s most affordable EV yet.” It’s available with two battery packs, 58.3 kWh or 81.48 kWh, good for 430 km (270 miles) and 599 km (375 miles) of WLTP range, respectively.
With new EVs on the way, this could be just the start. Kia is launching several new EVs in the UK this year, including the EV4 sedan (and hatchback) and EV5 SUV. It also confirmed that the first PV5 electric vans will be delivered to customers by the end of the year.
Electrek’s Take
Globally, Kia sold a record 772,351 vehicles in the first quarter, its best since it started selling cars in 1962. With the new EV4, the brand’s first electric sedan and hatchback, launching this year, Kia looks to build on its momentum in 2025.
Kia has also made it very clear that it wants to be a global leader in the electric van market with its new Platform Beyond Vehicle (PBV) business, starting with the PV5 later this year.
Earlier today, we learned Kia’s midsize electric SUV, the EV5, is the fourth best-selling EV in Australia through March, outselling every BYD vehicle (at least for now). The EV5 is rolling out to new markets this year, including Canada, the UK, South Korea, and Mexico. However, it will not arrive in the US.
For those in the US, there are still a few Kia EVs to look forward to. Kia is launching the EV4 globally, including in the US, later this year. Although no date has been set, Kia confirmed the EV3 is also coming. It’s expected to arrive in mid-2026.
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