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SpaceX’s space-optimized Starship engine could be ready sooner than later

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SpaceX CEO Elon Musk says that there is now a chance that a vacuum-optimized version of the Raptor engine will be ready for near-term Starship launches, indicating that development has either been re-prioritized or is going more smoothly than expected.

This is a significant shift away from a strategy discussed by Musk just four months ago, in which a single variant of Raptor was to be used on Starship and Super Heavy to shorten the next-gen rocket’s path to orbit. For unknown reasons, that approach may have already been replaced with a new alternative that would lead to a Starship with six Raptors instead of seven and a 50-50 split between vacuum and sea level-optimized engines.

Without a more specific development timeline, it’s unclear if RaptorSL-only versions of Starship will ever make it to orbit as a sort of interim solution. The fact that SpaceX is already considering an expedited vacuum variant bodes well for the current status of sea level engine testing, and Musk admittedly revealed that RaptorVac development was to be delayed just days before Raptor’s first full-scale static fire in February 2019.

Speaking less than four months ago, the purpose of delaying RaptorVac development was “to reach the moon as fast as possible.” As long as a Starship powered by unoptimized Raptors was capable of reaching the Moon, designing with RaptorVac in mind would create delays without adding any near-term benefits. The most obvious reasons that SpaceX would revert RaptorVac strategy are changes in technical confidence (i.e. full-scale Raptor testing is going better than expected) or SpaceX’s motivation to get to the Moon “as fast as possible”.

The latter explanation is certainly possible, especially in light of recent hints that there is a terminal lack of funding and Congressional interest in NASA’s Moon return proposal. SpaceX has its own commercial motivations for Starship to get to the Moon in short order, however, including some form of a contract with Japanese billionaire Yusaku Maezawa. As such, it seems more likely that SpaceX’s Raptor program is making rapid progress, outstretching the expectations of those holding the company’s strategic reins.

Just five days after its first ignition, SpaceX successfully tested Raptor SN01 at more than twice the thrust of Merlin 1D. (SpaceX)

According to Musk, sea level-optimized Raptor development is proceeding so smoothly that SpaceX may be able to move into relatively high-volume production – more than two engines per week – this summer (June 1 to August 31). At the moment, SpaceX appears to be focused on testing Raptor at its McGregor, Texas development facilities. This is no surprise for a cutting-edge rocket engine less than four months into full-scale testing, as inevitable off-nominal or unexpected behavior revealed during test fires can often lead to design optimizations or even major changes.

Since the first finalized Raptor was delivered to McGregor in late January, SpaceX has completed an average of one new engine per month, all of which have then been tested in Texas. After completing its McGregor acceptance tests, SN03 also became the first Raptor engine to leave the ground under its own power as part of Starhopper’s first two tethered hops. According to Musk, Starhopper could return to ‘flight’ as early as May 31st.

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Eric Ralph is Teslarati's senior spaceflight reporter and has been covering the industry in some capacity for almost half a decade, largely spurred in 2016 by a trip to Mexico to watch Elon Musk reveal SpaceX's plans for Mars in person. Aside from spreading interest and excitement about spaceflight far and wide, his primary goal is to cover humanity's ongoing efforts to expand beyond Earth to the Moon, Mars, and elsewhere.

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Armored Tesla Cybertruck “War Machine” debuts at Defense Expo 2025

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Photo: Unplugged Performance

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Tesla Megapacks chosen for 548 MWh energy storage project in Japan

Tesla plans to supply over 100 Megapack units to support a large stationary storage project in Japan, making it one of the country’s largest energy storage facilities.

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Credit: Tesla

Tesla’s Megapack grid-scale batteries have been selected to back an energy storage project in Japan, coming as the latest of the company’s continued deployment of the hardware.

As detailed in a report from Nikkei this week, Tesla plans to supply 142 Megapack units to support a 548 MWh storage project in Japan, set to become one of the country’s largest energy storage facilities. The project is being overseen by financial firm Orix, and it will be located at a facility Maibara in central Japan’s Shiga prefecture, and it aims to come online in early 2027.

The deal is just the latest of several Megapack deployments over the past few years, as the company continues to ramp production of the units. Tesla currently produces the Megapack at a facility in Lathrop, California, though the company also recently completed construction on its second so-called “Megafactory” in Shanghai China and is expected to begin production in the coming weeks.

READ MORE ON TESLA MEGAPACKS: Tesla Megapacks help power battery supplier Panasonic’s Kyoto test site

Tesla’s production of the Megapack has been ramping up at the Lathrop facility since initially opening in 2022, and both this site and the Shanghai Megafactory are aiming to eventually reach a volume production of 10,000 Megapack units per year. The company surpassed its 10,000th Megapack unit produced at Lathrop in November.

During Tesla’s Q4 earnings call last week, CEO Elon Musk also said that the company is looking to construct a third Megafactory, though he did not disclose where.

Last year, Tesla Energy also had record deployments of its Megapack and Powerwall home batteries with a total of 31.4 GWh of energy products deployed for a 114-percent increase from 2023.

Other recently deployed or announced Megapack projects include a massive 600 MW/1,600 MWh facility in Melbourne, a 75 MW/300 MWh energy storage site in Belgium, and a 228 MW/912 MWh storage project in Chile, along with many others still.

What are your thoughts? Let me know at zach@teslarati.com, find me on X at @zacharyvisconti, or send us tips at tips@teslarati.com.

Tesla highlights the Megapack site replacing Hawaii’s last coal plant

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Elon Musk responds to Ontario canceling $100M Starlink deal amid tariff drama

Ontario Premier Doug Ford said, opens new tab on February 3 that he was “ripping up” his province’s CA$100 million agreement with Starlink in response to the U.S. imposing tariffs on Canadian goods.

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NORAD and USNORTHCOM Public Affairs, Public domain, via Wikimedia Commons

Elon Musk company SpaceX is set to lose a $100 million deal with the Canadian province of Ontario following a response to the Trump administration’s decision to apply 25 percent tariffs to the country.

Starlink, a satellite-based internet service launched by the Musk entity SpaceX, will lose a $100 million deal it had with Ontario, Premier Doug Ford announced today.

Ford said on X today that Ontario is banning American companies from provincial contracts:

“We’ll be ripping up the province’s contract with Starlink. Ontario won’t do business with people hellbent on destroying our economy. Canada didn’t start this fight with the U.S., but you better believe we’re ready to win it.”

It is a blow to the citizens of the province more than anything, as the Starlink internet constellation has provided people in rural areas across the globe stable and reliable access for several years.

Musk responded in simple terms, stating, “Oh well.”

It seems Musk is less than enthused about the fact that Starlink is being eliminated from the province, but it does not seem like all that big of a blow either.

As previously mentioned, this impacts citizens more than Starlink itself, which has established itself as a main player in reliable internet access. Starlink has signed several contracts with various airlines and maritime companies.

It is also expanding to new territories across the globe on an almost daily basis.

With Mexico already working to avoid the tariff situation with the United States, it will be interesting to see if Canada does the same.

The two have shared a pleasant relationship, but President Trump is putting his foot down in terms of what comes across the border, which could impact Americans in the short term.

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