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.
Elon Musk
Tesla Supercharger for Business exposes jaw-dropping ROI gap between best and worst locations
Tesla’s new Supercharger for Business calculator reveals an eye-opening all-in cost and location-based ROI projections.
Tesla has launched an online calculator for its Supercharger for Business program, giving property owners their first transparent look at what it really costs to install Superchargers on site and what kind of return they can expect.
The program itself launched in September 2025, allowing businesses to purchase and operate Supercharger hardware on their own property while Tesla handles installation, maintenance, software, and 24/7 driver support. As Teslarati reported at launch, hosts also get their logo placed on the chargers and their location integrated into Tesla’s in-car navigation, meaning drivers are actively routed there. The stalls are open to all EVs, not just Teslas.
We launched Supercharger for Business in 2025 to help companies get charging right. We found simplicity and transparency to be a problem in this industry.
We’re now sharing pricing and a financial calculator to help make informed decisions. The goal is to accelerate investments,…
— Tesla Charging (@TeslaCharging) April 8, 2026
The new online calculator, announced by Tesla on Wednesday with the note that “simplicity and transparency” have been a problem in the industry, lets any business enter a U.S. address and get a real cost and revenue model. A standard 8-stall V4 Supercharger site runs approximately $500,000 in hardware and $55,000 per post for installation, bringing an all-in price just shy of $1 million. Tesla charges a flat $0.10 per kWh fee to cover software, billing, and network operations. Businesses set their own retail price and keep the margin above that fee.
Taking a look at Tesla’s Supercharger for Business online calculator, we can see that ROI is not uniform, and the gap between a strong location and a poor one can stretch the breakeven point by several years.
The biggest driver is foot traffic and how long people stay. A busy rest station, hotel, or outlet mall brings in repeat visitors who need to charge while they’re already stopped, pushing utilization numbers higher and shortening payback time.
Tesla Supercharger for Business ROI calculator
Local electricity rates matter just as much on the cost side. Markets like California carry some of the highest commercial electricity rates in the country, which eats into the margin between what a host pays per kWh and what they charge drivers. At the same time, dense urban areas with high EV adoption tend to support higher retail charging prices, which can offset that cost if demand is strong enough. Weather also plays a role. Cold climates reduce battery efficiency and increase charging frequency, but they can also suppress utilization in winter months if drivers avoid stopping in exposed outdoor locations. Suburban and rural sites face a different problem: lower baseline EV traffic, which means a site with cheaper power and lower operating costs can still take longer to pay back simply because the stalls sit idle more often. Tesla’s calculator uses real fleet data to pre-fill utilization estimates by ZIP code, so businesses can run their specific address against these variables rather than relying on averages.
The program has seen real adoption. Wawa, already the largest host of Tesla Superchargers with over 2,100 stalls across 223 locations, opened its first fully owned and branded site in Alachua, Florida earlier this year. Francis Energy of Oklahoma and the city of Alpharetta, Georgia have also deployed branded stations through the program, as Teslarati covered in January.
Tesla now exceeds 80,000 Supercharger stalls worldwide, and the calculator makes the economic case for accelerating that number through private investment rather than company-owned sites alone.
Energy
Tesla’s newest “Folding V4 Superchargers” are key to its most aggressive expansion yet
Tesla’s folding V4 Supercharger ships 33% more per truck, cuts deployment time and cost significantly.
Tesla is rolling out a folding V4 Supercharger design, an engineering change that allows 33% more units to fit on a single delivery truck, cuts deployment time in half, and reduces overall installation cost by roughly 20%.
The folding mechanism addresses one of the least glamorous but most consequential bottlenecks in charging infrastructure: getting hardware from factory floor to job site efficiently. By collapsing the form factor for transit and unfolding into an operational configuration on arrival, the new design dramatically reduces the logistics overhead that has historically slowed Supercharger rollouts, particularly at large or remote sites where multiple units are needed simultaneously.
The timing aligns with a broader acceleration in Tesla’s network strategy. In March 2026, Tesla’s Gigafactory New York produced its final V3 Supercharger cabinet after more than seven years and 15,000 units, pivoting entirely to V4 cabinet production. The V4 cabinet itself is already a generational leap, delivering up to 500 kW per stall for passenger vehicles and up to 1.2 MW for the Tesla Semi, while supporting twice the stalls per cabinet at three times the power density of its predecessor. The folding transport innovation layers logistical efficiency on top of that technical foundation.
Tesla launches first ‘true’ East Coast V4 Supercharger: here’s what that means
Tesla Charging’s Director Max de Zegher, commenting on the V4 cabinet when it launched, captured the operational philosophy behind these changes: “Posts can peak up to 500kW for cars, but we need less than 1MW across 8 posts to deliver maximum power to cars 99% of the time.” The design philosophy has always been about maximizing real-world throughput, not just peak specs, and the folding transport upgrade extends that thinking into the supply chain itself.
Posts can peak up to 500kW for cars, but we need less than 1MW across 8 posts to deliver maximum power to cars 99% of the time.
No more DC busbar between cabinets. Power comes from a single V4 cabinet to 8 stalls. Easier to install, cheaper, more reliable.
Introducing Folding Unit Superchargers
– V4 cabinet with 500kW charging
– 8 posts per unit
– 2 units per truck
– 2 configurations: folded, unfoldedFaster. Cheaper. Better. pic.twitter.com/YyALz0U5cA
— Tesla Charging (@TeslaCharging) March 25, 2026
The network is expanding rapidly on multiple fronts. The first true 500 kW V4 Supercharger on the East Coast opened in Kissimmee, Florida in March 2026, followed closely by a new site in Nashville, Tennessee. A public Megacharger for the Tesla Semi launched in Ontario, California in early March, with 37 additional Megacharger sites targeted for completion by end of year. Meanwhile, more than 27,500 Supercharger stalls are now accessible to non-Tesla EVs from brands including Ford, GM, Rivian, Hyundai, and most recently Stellantis, whose Dodge, Jeep, Ram, Fiat, and Maserati BEV customers gained access in March 2026.
As Tesla pushes toward a denser, faster, and more open charging network, innovations like the folding V4 Supercharger reflect the company’s growing focus on deployment velocity, not just hardware performance. Getting chargers to the ground faster, cheaper, and in greater volume per shipment may ultimately matter as much as the kilowatts they deliver.
Elon Musk
Tesla’s $2.9 billion bet: Why Elon Musk is turning to China to build America’s solar future
Tesla looks to bring solar manufacturing to the US, with latest $2.9 billion bet to acquire Chinese solar equipment.
Tesla is reportedly in talks to purchase $2.9 billion worth of solar manufacturing equipment from a group of Chinese suppliers, including Suzhou Maxwell Technologies, which is the world’s largest producer of screen-printing equipment used in solar cell production. According to Reuters sources, the equipment is expected to be delivered before autumn and shipped to Texas, where Tesla plans to anchor its next phase of domestic solar production.
The move is a direct extension of a vision Elon Musk has been building for months. At the World Economic Forum in Davos this past January, Musk announced that both Tesla and SpaceX were independently working to establish 100 gigawatts of annual solar manufacturing capacity inside the United States. Days later, on Tesla’s Q4 2025 earnings call, he made the ambition concrete: “We’re going to work toward getting 100 GW a year of solar cell production, integrating across the entire supply chain from raw materials all the way to finished solar panels.”
Job postings on Tesla’s website reflect that same target, with language explicitly calling for 100 GW of “solar manufacturing from raw materials on American soil before the end of 2028.”
Tesla job listing for Staff Manufacturing Development Engineer, Solar Manufacturing
The urgency behind the latest solar manufacturing target is rooted in a set of rapidly emerging pressures related to AI and Tesla’s own energy business. U.S. power consumption hit its second consecutive record high in 2025 and is projected to climb further through 2026 and 2027, driven largely by the explosion in AI data centers and the broader electrification of transportation. Tesla’s own energy division, which produces the Megapack utility-scale battery storage system, has been growing rapidly, and solar supply is a critical companion component for the business to scale. Musk has argued that solar is not just a clean energy option but the only one that makes economic sense at the scale AI infrastructure demands.
Tesla lands in Texas for latest Megapack production facility
Ironically, the path to domestic solar independence currently runs through China. Sort of.
Despite Tesla’s stated push to localize its supply chain, mirrored recently by the company’s plan for a $4.3 billion LFP battery manufacturing partnership with LG Energy Solution in Michigan, Tesla still relies on China-based suppliers to keep its cost structure intact.
The $2.9 billion equipment deal underscores a tension Musk himself acknowledged at Davos: “Unfortunately, in the U.S. the tariff barriers for solar are extremely high and that makes the economics of deploying solar artificially high, because China makes almost all the solar.” Building the factory in America requires buying the machinery from the country Tesla is trying to reduce its dependence on.
Tesla named by U.S. Gov. in $4.3B battery deal for American-made cells
The regulatory pathway adds another layer of complexity. Suzhou Maxwell has been seeking export approval from China’s commerce ministry, and it remains unclear how quickly that clearance will come. Still, the market has already reacted, with shares in the Chinese firms reportedly involved in the talks surged more than 7% following the Reuters report that broke the story.
Whether Tesla can hit its 2028 target of 100GW of solar manufacturing remains an open question. Though that scale may seem staggering, especially in such a short timeframe, we know that Musk has a documented history of “always pulling it off” in the face of ambitious deadlines that may slip. But, rest assured – it’ll get done.
Tesla expands Unsupervised Robotaxi service to two new cities
Tesla is pushing Robotaxi features to owner cars with Spring Update
