After rapidly stacking Ship 20 and Booster 4 the evening prior, SpaceX appears to have begun testing a fully stacked Starship rocket for the first time ever.
Though the test SpaceX subjected Starship to was by no means ambitious and in spite of the fact that it no longer appears that Ship 20 and Booster 4 will ever fly, the first test of the first fully integrated prototype of a new rocket is still an immensely significant achievement – particularly so for the largest rocket ever built.
Standing around 119 meters (~390 ft) tall, Starship is unequivocally the largest and most voluminous rocket ever built. With its 29 Raptor V1 engines, the fully assembled Ship 20 and Booster 4 (B4) stack would have likely weighed around 4000-5000 tons (9-11M lb) and been able to produce around 5400 tons (11.9M lbf) of thrust at liftoff – substantially heavier and more powerful than Saturn V or N1, the largest rockets ever successfully and unsuccessfully launched.
For its first fully-integrated test, though, SpaceX appears to have put Starship through a fairly limited cryogenic proof – a test where flammable propellant is replaced with a similarly cold (cryogenic) fluid that’s similar enough to subject a rocket to similar thermal and mechanical stresses. For Ship 20 and Booster 4’s combined debut, Super Heavy was filled maybe 10-20% and Starship around 25-50% of the way with either liquid nitrogen (LN2) or a combination of LN2 and liquid oxygen (LOx). It’s difficult to tell but it’s unlikely any methane (LCH4) fuel was involved.
Back on the ground, Starship S20 completed five separate cryogenic proof tests before its first test on top of Super Heavy. More importantly, Ship 20 successfully completed several static fire tests, each of which also functioned as a wet dress rehearsal with LCH4/LOx propellant. Booster 4 had also passed several cryogenic proof tests. In that sense, it’s unlikely that SpaceX had a great deal of uncertainty as to whether either prototype would be able to complete yet another test.
Beyond the basic mechanical demonstration that Super Heavy Booster 4 is strong enough to support a partially loaded Starship, which probably wasn’t in doubt, it’s likely that the main purpose of this first full-stack cryoproof was to ensure that all the systems required to fuel Starship on top of Super Heavy were working as expected. That’s no small feat given that Starship is both the tallest rocket and largest upper stage ever assembled. To fully fuel a Starship for an orbital launch, around 1200 tons (~2.65M lb) of propellant (or LN2 for a cryoproof) – equivalent to the weight of more than two entire Falcon 9 rockets – must be pumped around 85 meters (~275 ft) up Starbase’s integration tower.
That requires thousands of feet of plumbing and a symphony of giant valves and pumps, all of which must work in concert – without leaking, jamming, or freezing – to fuel Starship. As such, the first full-stack cryoproof was just as much – or more – of a test of the orbital launch site’s launch/integration tower and tank farm. That first test is just the start of a long process, though, and it’s likely that SpaceX will attempt an increasingly ambitious series of tests with Booster 4 and Ship 20 over the next week or two.
That could involve simply filling the rocket further and raising its tank pressures or it could potentially culminate in a partial wet dress rehearsal with methane and oxygen propellant in place of liquid nitrogen. There’s an even smaller chance that SpaceX could attempt to static fire Super Heavy B4 for the first time, although sources like NASASpaceflight are no longer confident that Booster 4 will be static fired before retirement. More to the point, it would be uncharacteristically risky behavior from SpaceX to perform the very first static fire of a new prototype with an already proven Starship sitting on top of it. An anomaly as small as an uncontrolled fire – far from uncommon for Starships – could easily risk the catastrophic destruction of both stages, which would itself run the risk of significantly damaging the orbital launch site, which could easily take months to repair.
Nonetheless, there’s still a chance. SpaceX has opportunities for additional testing on March 17th, 18th, 21st, and 22nd.
News
Tesla China achieves this year’s second highest domestic sales in June
The figure represents Tesla’s second-best performance in 2025 so far.
Domestic sales for Tesla China reached 61,484 units in June, marking a sharp recovery from recent months and positioning the company for a stronger finish to the second quarter. The figure represents Tesla’s second-best performance in 2025 so far, trailing only March, when the company delivered 74,127 vehicles domestically.
A strong comeback for Tesla China
According to data from the China Passenger Car Association (CPCA), Tesla sold a total of 71,599 cars wholesale in June 2025. This means that Tesla’s domestic sales last month rose 59.3% compared to May’s 38,588 units and increased 3.75% year-over-year from 59,261 units in June 2024, as noted in a CNEV Post report.
The rebound ends a two-month streak of year-over-year declines and helped lift Tesla’s Q2 retail total in China to 128,803 units, though that still marks an 11.7% drop from the same period last year. For context, Tesla China sold 263,410 vehicles domestically, down 5.36% year-over-year, in the first six months of 2025.
Tesla’s stronger domestic showing in June came as the company scaled back its export output from Giga Shanghai. The factory exported 10,115 vehicles last month, down 56.2% from May and 13.9% from a year earlier. For the first half of 2025, Tesla China’s total exports reached 101,064 units, down 31.85% compared to the same period in 2024.
Tesla China’s 2025 performance
June saw continued growth across China’s broader new energy vehicle (NEV) market, with retail sales reaching 1.11 million units, up 29.7% year-over-year. Battery electric vehicles (BEVs) accounted for 661,000 of those sales. Tesla’s NEV market share for June was then 5.53%, down from 6.92% a year earlier but an improvement over May’s 3.78%.
The Model Y continues to be Tesla China’s primary driver of sales, with the vehicle’s wholesale figures reaching 51,253 units in June, up 16.6% from a year ago and nearly 30% from May. Wholesale numbers for the Model Y totaled 214,034 units in the first six months of the year. The Model 3, in comparison, saw wholesale volumes reach 150,440 units in the first six months of the year.
Elon Musk
Elon Musk confirms Grok 4 launch on July 9 with livestream event
The rollout will be accompanied by a livestream at 8 p.m. Pacific Time.
Elon Musk has officially confirmed that Grok 4, the latest version of xAI’s large language model, will launch on July 9. The rollout will be accompanied by a livestream at 8 p.m. Pacific Time, hosted on xAI’s official account on X.
xAI goes straight to Grok 4
Back in May, leaks indicated that xAI was getting ready to ship Grok 3.5. Considering Musk’s recent comments, however, it appears that the artificial intelligence startup would be focusing on the large language model’s fourth iteration instead. As noted in a Financial Express report, users on X have sighted references to Grok 4 in the lead up to the update’s launch, such as “grok-4-prod-mimic” and “Grok 4 Code.”
Musk’s Grok 4 announcement comes as AI competition intensifies between major players including OpenAI, Google, and xAI. With Musk’s Colossus supercomputer fully operational in Memphis, xAI appears to be accelerating its AI product roadmap.
Musk pushes Grok toward political neutrality
Grok 4’s launch also follows a recent controversy involving political bias, as noted in a CNN report. Last week, Grok responded to a user on X stating that political violence in the U.S. since 2016 had come more from the political right than the left. The chatbot noted in a later reply that its answer was based on information from sources like Reuters, the Journal of Democracy, and University of Maryland studies.
Musk stated that Grok’s response was a “major fail.” “Major fail, as this is objectively false. Grok is parroting legacy media. Working on it,” he wrote in a post on X. By the end of June, Musk noted that he was “grinding all night with the xAI team” and that they were making “good progress.” He also stated that the model “Will be called Grok 4. Release just after July 4th. Needs one more big run for a specialized coding model.”
News
Tesla opens massive solar Supercharger station in California
The Supercharger opened to customers ahead of Fourth of July weekend, while Tesla continues phase two of construction on the site.
Tesla has officially launched the first several Supercharging posts at a massive station in California, notably including solar canopies and grid-scale batteries to offer completely renewable charging.
Last week, Tesla announced on X that it opened the first 84 Supercharger stalls of a planned 168-stall station in Lost Hills, California. Additionally, the massive Supercharger project features 11MW of solar canopies and 10 Megapack batteries for off-grid charging powered entirely by solar energy.
Tesla completed the first phase of the project just days ahead of the busy Fourth of July holiday weekend, adding that initial construction took just eight months. In addition to the remaining charging stalls, Tesla says it’s building a set of lounge areas, renderings of which can be seen below alongside current photos of the site.
Notably, the site also includes V4 charging posts for the company’s latest available charging speeds, and it’s located near the busy junction between I-5 and Highway 46 in Kern County.
“Thank you [Kern County] and [PG&E] for collaboration and approvals,” Tesla wrote in a follow-up post.
Credit: Tesla Charging | X
Credit: Tesla Charging | X
Credit: Tesla Charging | X
Credit: Tesla Charging | X
Tesla Supercharger Maps for North America, Europe, and Asia pic.twitter.com/0U5r0XRPyo
— TESLARATI (@Teslarati) July 2, 2025
READ MORE ON TESLA SUPERCHARGERS: Tesla launches ultra-fast V4 Superchargers in China for the first time
Testing at the LA Diner, plus Musk update on potential Tesla solar Gigafactory
The huge Tesla Supercharger station completed phase one of construction fairly quickly, especially given how long Tesla has been working on its unique Los Angeles diner, drive-in, and Supercharger location. Still, the company was seen performing some testing at the nearly-completed charging station earlier this month, and will reportedly be holding a job fair.
Elon Musk also responded on Monday morning to a post on X, suggesting that Tesla is “thinking about” building a U.S.-based solar Gigafactory in order to help support increased power needs with AI growth, and to bolster domestic solar production.
Tesla is building a new UFO-inspired Supercharger in the heart of Alien country
Tesla China achieves this year’s second highest domestic sales in June
Elon Musk confirms Grok 4 launch on July 9 with livestream event
Tesla opens massive solar Supercharger station in California
-
Elon Musk1 week agoTesla investors will be shocked by Jim Cramer’s latest assessment
-
News2 weeks agoTesla Robotaxi’s biggest challenge seems to be this one thing
-
News2 weeks agoWatch the first true Tesla Robotaxi intervention by safety monitor
-
Elon Musk2 weeks agoA Tesla just delivered itself to a customer autonomously, Elon Musk confirms
-
News4 days agoTesla Model 3 ranks as the safest new car in Europe for 2025, per Euro NCAP tests
-
Elon Musk2 weeks agoxAI welcomes Memphis pollution results, environmental groups push back
-
Elon Musk2 weeks agoElon Musk commends Tesla team on successful Robotaxi launch
-
Elon Musk2 weeks agoElon Musk confirms Tesla Optimus V3 already uses Grok voice AI