Energy
Why Tesla’s microgrid project is life changing for Ta’u’s island community
Tesla’s subsidiary, SolarCity, is at the end of a one-year solar energy microgrid project on the American Samoa island of Ta’u that, at 1.4 megawatts, can cover “nearly 100%” of its 600 residents’ electrical needs. Its benefits may be life changing for residents of Ta’u.
Ta’u is a rectangular island 10 km. long and 5 km. wide. In the distant geologic past, the south side of Ta’u collapsed, leaving dramatic 500 km. high cliffs that rise directly from the southern sea. Craters punctuate the island’s wild, thickly forested interior, known for its steep slopes and gullies. Terrain and bush can change quickly, and most of the upland area is inaccessible. American Samoa was first visited by European explorers in the 18th century, but its islands have been inhabited for over 3000 years. Today, at about 340 persons per square km., American Samoa is the second most densely populated South Pacific entity, after Tuvalu.
The island’s residents have acquired power to date largely through generators fueled by diesel. Diesel in itself is made from chemicals including sulfates, ammonium, nitrates, elemental carbon, condensed organic compounds, and even carcinogenic compounds rich in heavy metals such as arsenic, selenium, cadmium and zinc. Diesel exhaust poses major health hazards, contributes to climate change, is costly to ship, and can lead to frequent temporary blackouts. With a dramatic decrease on diesel reliance, Ta’u, through the SolarCity renewable microgrid, will experience valuable community life enhancements that can increase local control and community independence.
Grid stability in a remote location
Energy efficiency is an important component of a renewable microgrid transition. Energy storage is key to renewable island and remote community microgrids. The Ta’u integrated microgrid –- 1.4 megawatts of solar power and 6 megawatt hours of battery storage from 60 Tesla Powerpack, alongside smart controls to enable load shifting— will become an important component of the Ta’u community’s transition to energy independence.
Maintaining grid stability with renewable integration has proved challenging in many other remote island cases in which energy reliance has shifted to a microgrid. SolarCity will likely use a phased integration approach that will initially bring a small amount of renewable technologies online, as it works to balance the system, and then continue to step up their renewable penetration by integrating more solar resources alongside energy storage and advanced controls. For example, on King Island, Australia, Hydro Tasmania has overcome many renewable integration challenges to incorporate more renewable resources into the system. Simon Gamble recalls, “We started adding renewables 18 or 19 years ago, and the challenges have been technical. We had to solve the problems we uncovered as we went.”
Tesla’s Powerpack system will allow the island to use stored solar energy at night, meaning renewable energy is available for use around the clock. Procuring and transporting new technologies and equipment, which has been an issue with other remote island locations that have integrated a renewable energy microgrid, may not present as many challenges for Ta’u, due to the SolarCity involvement. Often, only one or two operators live nearby, so if major technical issues arise, teams must fly in to address the problems. Having SolarCity as a partner can diminish such technical issues on Ta’u.
How a SolarCity microgrid can alter traditional microgrid instability
Although some renewable systems have found success, other communities face challenges transitioning from a fossil fuel reliance to a microgrid. A SolarCity microgrid has the capacity to overcome these challenges due to the influence and reliability of Tesla Energy. Microgrid systems foster community resiliency and stability. Power electronics and control systems enable a more stable grid through better controls. At the same time, relying more on local resources and less on imported diesel increases overall resiliency for the Ta’u community.
Transitioning to renewable microgrids can reduce costs. Research indicates that relying on more diversely and renewably powered microgrids has led to reduced diesel usage, electricity prices, and operating costs. Creating a project like the SolarCity microgrid on Ta’u, with the requisite business plan to lower overall costs and attract investment, is a difficult and lengthy task. However, it has clearly been made easier with SolarCity’s deep understanding of inherent necessary technologies, processes, and pitfalls.
Protecting the Ta’u culture through energy independence
Fa’a Samoa or the Samoan Way is the foundation of Samoan society, culture, and heritage. Fa’a Samoa customs and culture are over 3000 years old and have changed very little over this period. The Fa’a is tenaciously defended by those who have chosen to remain in their home villages rather than to emigrate to the U.S. Fa’a culture and customs are based around the mutual respect given to elders, the church, visitors, and the extended family. The SolarCity grid will enhance the Fa’s or Samoan Way and reinforce the foundation of Samoan society, culture, and heritage.
SolarCity, alongside American Samoan and U.S. authorities, including the Department of Interior, has provided the upfront costs of designing, delivering, installing, and maintaining the solar microgrid. Their customers on Ta’u will pay a fixed monthly fee for clean solar power and start realizing cost savings from day one without the hassle of owning and maintaining their own power system. Removing the hazards of power intermittency will offer a tremendous difference in the lives of Ta’u residents.
“I recall a time they weren’t able to get the boat out here for two months,” said Keith Ahsoon, a local resident whose family owns one of the food stores on the island. “We rely on that boat for everything, including importing diesel for the generators for all of our electricity. Once diesel gets low, we try to save it by using it only for mornings and afternoons. Water systems here also use pumps, everyone in the village uses and depends on that. It’s hard to live not knowing what’s going to happen. I remember growing up using candlelight. And now, in 2016, we were still experiencing the same problems.”
Sources: American Samoa, Renewable Microgrids
As Tesla owners, solar advocates and obvious believers in the future of sustainable energy, we’ve partnered with a service for estimating solar costs based on one’s location and energy requirement. Please consider supporting our solar-focused affiliate partner and fan to Teslarati by getting a cost estimate.
Energy
Taiwan power firm bets big on Tesla Megapacks as AI data center thirst grows
Taiwan’s Apollo Power orders 260 Tesla Megapacks, betting AI data centers will need more electricity.
A Taiwanese power company has ordered 260 Tesla Megapack 2XL units, roughly 1GWh of storage, betting that electricity rather than chips will decide how fast AI data centers come online. Apollo Power signed the contract with Tesla’s Taiwan energy arm on October 8, according to the company’s filing with the Taiwan stock exchange.
The filing says the units are meant for behind the meter storage and resilient grid projects, with delivery in batches from the end of 2027 and sites operating in 2028. Apollo and Tesla did not disclose a price, citing a confidentiality agreement. Apollo plans to pay for the equipment through a cash capital increase and bank financing, and it noted the purchase is not revenue and does not mean it holds firm orders from its partners.
Biggo reported that only about 33 units are under signed customer contracts, with roughly 150 more in negotiation. The same report put total project investment near NT$130 billion, but that figure includes installation work, with the equipment itself making up about 40 to 50 percent. In other words, a large share of this order is Apollo reserving supply ahead of demand. Apollo’s chairman told local media global large storage supply is tight, which is why the company locked in the units early, according to Yahoo Taiwan Finance.
Apollo also launched an AI data center and grid resilience alliance with Phison, Gigabyte and Shihlin Electric. The pitch rests on a pilot at Phison’s Zhunan plant, where Apollo and Tesla Energy Taiwan installed grid forming Megapack 2XLs in June. Tesla Energy Taiwan general manager Sun Hsiao-Han said the project went from demo to 1GWh in four months, and that Tesla Energy has deployed more than 50GWh worldwide.
Taiwan’s cabinet has approved amendments that would require large energy users to install their own generation and storage, which gives enterprise storage a regulatory tailwind.
The deal fits a pattern Teslarati has tracked. Tesla’s Megablock targets 1GWh commissioned in 20 business days, a pitch aimed squarely at fast moving data center builds. Megapacks already back xAI’s Colossus in Memphis and a 400MW AI campus in Brazil. Sun Media adds that Megapack 2XL was named among the first products in Nvidia’s DSX Ready qualification for battery storage in AI factories.
Deliveries are more than a year away, so the real test is how much of that 260 unit order turns into signed customer contracts.
Energy
Tesla Model 3 and Model Y can now do what only Cybertruck could
Tesla Model 3 and Model Y can power your home with Powerwall 3 during outages.
Tesla has turned its two top sellers into backup batteries for the house.
Tesla Energy announced on Tuesday that Powershare Home Backup is now available for new Model 3 and Model Y vehicles paired with a Powerwall 3, saying the car can “extend your home backup by over 2 days.” Minutes later, Tesla’s main account quoted the post with a broader pitch: “With Powerwall 3, every Tesla can now serve as your home’s backup battery.”
Until this week, the Cybertruck was the only Tesla that could send power back into a home, and that capability only began working alongside Powerwall 3 last month, after years of ambitious targets.
Tesla’s updated Powershare page says every Model 3 and Model Y ordered in the U.S. or Puerto Rico on or after October 1, 2026 can use the feature. Some, but not all, earlier cars also qualify. Owners can check on the touchscreen under Software, then Additional Vehicle Information, where a capable car shows “Powershare Support: Enabled.” As Electrek reported, bidirectional power on the two cars runs through an inverter Tesla calls PCS2 Lite, and the company has not said when that part entered production on each trim.
The home side is simpler. A house that already has a Powerwall 3 and either a Wall Connector 3 or Universal Wall Connector needs no additional equipment, and Tesla says compatibility is enabled through a software update. When the grid drops, the Powerwall and the car work together, with up to 11.52 kW of continuous power available. Tesla’s “over two days” estimate assumes a home using 30 kWh per day and a car starting at a 90 percent charge. Standard trims are rated for up to two days, while the Cybertruck adds more than three.
There are limits. Powerwall 2 and Powerwall+ support is listed as “coming soon.” Model S and Model X are not included, and Grid Support, the program that lets Cybertruck owners in Texas send power back to the grid during demand spikes for bill credits, is not available for Model 3 or Model Y.
The rollout also lines up with something Elon Musk said more than three years ago. At Tesla’s March 2023 Investor Day, Musk said, “I don’t think very many people are going to want to use bidirectional charging, unless you have a Powerwall.” Tesla has now shipped the feature for its volume cars with exactly that requirement attached.
The Powerwall pairing was the hard part on Cybertruck. Tesla told owners in December 2025 that Powershare with Powerwall had been pushed to mid 2026, and lead engineer Wes Morrill explained that two devices capable of forming a home’s grid have to negotiate which one leads during an outage, across multiple generations of hardware. With that work done for the truck, Tesla was able to extend it to the Model 3 and Model Y within a month.
Ford and GM have offered home backup from their EVs for several years, but both require a separate inverter and backup hardware. Tesla’s version leans on equipment many Powerwall 3 owners already have on the wall. Powershare for the two cars also ships as part of software update 2026.38.3, the same release that began delivering Halloween Mode on Tuesday.
Elon Musk
Google just picked SpaceX for its first step into orbital AI
Google will launch its first Project Suncatcher AI satellite on SpaceX’s Transporter-18 rideshare next week.
Google is about to put its own AI chips into orbit for the first time, and it is paying SpaceX to get them there.
The company said Thursday that the first in-orbit test of Project Suncatcher, its research effort to find out whether space can host large-scale AI computing, will fly next week on SpaceX’s Transporter-18 rideshare mission.
The satellite, called MVP, is about the size of a refrigerator and carries four of Google’s Tensor Processing Units, the same chips Google runs in its ground data centers. Google originally planned to launch two custom satellites in 2027, but chose to move faster by integrating its chips into a satellite.
MVP’s solar panels supply about one kilowatt of power, and Google will run Gemini models on the TPUs only in bursts of roughly 15 minutes before the chips shut down so the radiators can shed heat. In a blog post, Google said its Trillium TPUs survived vibration testing that mimicked sustained launch loads of up to 10g, with individual components seeing 50 to 100g, and handled a radiation dose greater than a five year mission would deliver.
SpaceX and Google mull massive partnership on Musk’s orbital data dream: report
Next week’s flight, slated for October 1, follows a relationship that became public in May, when Teslarati reported that Google was in talks with SpaceX for a launch deal tied to orbital data centers. Google also holds a stake of roughly 6% in SpaceX.
The two companies are chasing the same idea from very different starting points. SpaceX’s own orbital compute program is built around the AI1 satellite, a roughly 70 meter structure derived from Starlink V3 hardware that is designed for 150 kW of peak compute, about 150 times the power MVP will draw. Elon Musk has brushed off concerns about crowding orbit with those satellites, and SpaceX is building its Gigasat factory in Bastrop, Texas, to produce them, targeting an annualized rate of about 1 GW of space compute by the end of 2027.
Musk also posted on X on Thursday that “the amount of compute in space will obviously round up to 100% of all compute.”
Google has been more cautious in public. Its research estimates that launch prices need to fall below about $200 per kilogram before an orbital data center can compete with a ground facility on energy cost, a threshold the company believes could be reached around the mid 2030s. The Suncatcher team has said it expects the effort to remain a project rather than a product for years, which leaves the first real test of its hardware riding on a rocket from the company with the most aggressive timeline in the field.
Elon Musk will give ‘every kid in America’ a SpaceX share in 2027
Elon Musk reveals why Boring Co’s biggest East Coast project never happened
Tesla CEO Elon Musk reminds everyone about Roadster’s true meaning
SpaceX reveals how its 1 Million AI satellite network will work and prevent space collisions
Tesla Roadster: Three configs, one can fly, 0-60 in 0.8 seconds
