Tesla’s Megapack is rapidly becoming a key component in energy storage and grid modernization efforts worldwide. Though often associated with powering AI infrastructure or industrial operations, Megapack’s true strength lies in its ability to stabilize electrical grids during blackouts and brownouts.
In a recent behind-the-scenes reveal, Tesla showcased the impressive scale of Megapack production at its Mega Lathrop facility, along with real-world examples of how these systems are already transforming energy resilience across the globe.
Mega-Scale Megapack
Tesla is operating the largest utility-scale battery manufacturing facility in North America at Mega Lathrop, which has the capacity to produce 10,000 Megapacks annually. Thanks to a highly automated assembly process that uses over 30 welding robots to assemble the core Megapack structure. This is the largest manufacturing fixture Tesla uses— likely to only be matched by future developments at Mega Shanghai.
Tesla uses a highly automated powder coating process, utilizing over 90 robotic paint atomizers to apply more than 140 pounds of powder coat to each Megapack. This process delivers Tesla’s signature white reflective finish, engineered for long-term durability and corrosion resistance that lasts up to 20 years, even in harsh coastal or high-heat environments.
All of Megapack’s power electronics are designed and built in-house. Each Megapack uses 24 battery modules, electrical busing, and thermal management systems to ensure grid reliability and help to maximize energy density. The architecture pairs each inverter with a battery module to maximize energy availability and overall uptime. Plus, before each Megapack ships its way across the world, Tesla performs rigorous on-site quality control to ensure that the installation process is as seamless as possible.
Watch Tesla’s video of the manufacturing process below:
Megapack’s Real-World Impact: Hawaii
The core purpose of Megapack is to make power grids more stable and resilient while also reducing reliance on dirty peak power plants like coal. They achieve this by balancing energy supply and demand in real-time, smoothing out fluctuations from variable renewable sources like solar and wind, which helps to prevent grid shortages.
Hawaii actually provides the most real and down-to-earth example of Megapack’s impact. In mid-2024, the Kapolei Energy Storage facility in Hawaii came online. Hawaii utilized 258 Megapacks with a combined capacity of 565 MWh, successfully replacing the state’s last coal-fired power plant. This single facility can power approximately 20% of Oahu’s peak electricity needs by itself for approximately 4 hours.
The project is more than just removing coal plants, though. It serves as an example of Megapack’s grid integration and grid forming technology. The Kapolei Energy Storage facility can manage grid fluctuations caused by weather changes impacting renewable energy, improving stability and preventing blackouts. Thanks to their rapid inverter response times of under a millisecond, Megapacks participate in complex grid balancing activities, including fast frequency and voltage support, which helps to maintain grid balance throughout the day. Beyond that, Kapolei also allows Hawaii to black-start the grid in case of a major power outage that takes out a large section of the grid.
This functionality would be especially useful in Spain, where black-starting the grid took over eight hours recently and is still disrupting the day-to-day life of people there.
You can check out Megapack’s real-world impact in this video from Tesla below:
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Tesla recently introduced Buy Now, Pay Later (BNPL) payment options in the United States and Canada for items in the Tesla Shop, letting owners pay later for new vehicle accessories.
However, with Tesla app update 4.46, they’re expanding support to a much more critical area — Tesla Service. Qualifying owners in the U.S. and Canada will now be able to use Pay Later options for service performed by Tesla, which includes maintenance or repairs.
Services are provided by Affirm and Klarna, as per Mark Fonte, a Senior Software Engineer working on the Tesla app.
The new feature is seamlessly integrated into the existing service workflow within the Tesla app.
On the Service Estimate, before work on the vehicle begins, you will see a new message on the estimate screen: Pay over time - see if you qualify.
Tapping this link opens the payment calculator, which allows you to view potential payment structures and monthly costs. This provides a clear picture of what a payment plan would look like before you commit to servicing your vehicle.
Additionally, after service is complete and you are ready to pay, the final payment screen will present Affirm and Klarna (region-dependent) as selectable payment methods, alongside the usual options of Tesla Credit or your primary payment card.
Tapping Affirm or Klarna here will reopen the payment calculator, and a confirmation prompt will appear before selecting either BNPL option.
Service Now, Pay Later
Overall, the integration of BNPL providers for service is a thoughtful one for vehicle owners. The terms can vary widely, so it’s important to compare them to other payment options you may have access to. The additional financial flexibility, when faced with a large repair bill, allows more owners to get their vehicle professionally and properly serviced by Tesla.
For those getting larger work done, such as high-voltage battery pack replacements, this is an excellent option to spread payments over a longer period, helping reduce the burden of vehicle repair.
With the launch of Tesla’s Robotaxi Network, we didn't just get a peek into the future of transportation—we got a detailed look at the next version of FSD.
Videos from early access riders revealed some additional capabilities over current public FSD builds, showing off how it handles emergency vehicles and more.
Safety First for First Responders
One of the biggest changes in FSD’s capabilities is its improved handling of emergency vehicles. During a ride in Austin, Robotaxi is seen identifying an approaching ambulance using a combination of visual and audio data, activating its turn signal, and smoothly pulling over to the side of the road to let the ambulance by (video below).
This is a driving task that requires more than simple awareness of laws. It requires reasoning skills to determine where to move the vehicle to create a safe path, as well as the ability to quickly identify an ambulance or another emergency service vehicle with its sirens and lights activated. Understanding the context and executing a safe and predictable maneuver is crucial, as a wrong maneuver could actually make matters worse.
For FSD and Robotaxi to gain both public trust and regulatory approval, this skill is non-negotiable, and Tesla demonstrated its advancements right here. It’s not surprising Tesla added this ability before Robotaxis made it to public roads.
How does a fleet of Robotaxis keep its eyes clean without constant human intervention? Well, a clever new feature that Tesla has previously hinted at in their FSD release notes provides the answer. Robotaxi can now trigger a specific wiper and washer fluid sequence designed to clean the main front-facing cameras.
This might seem like a small detail, but it’s a brilliant solution to one of Tesla’s primary challenges - maintaining sensor clarity. While the vehicle could simply wipe the windshield multiple times, this is a clever solution to clean the most important area of the windshield as thoroughly as possible by focusing extra wiper fluid and wipes on that area.
Complex Maneuvers
Two areas where current builds of FSD V13.2.9 sometimes show hesitation are U-turns and navigating busy parking lots. The latest Robotaxi build appears to improve on both of these areas.
This first video shows a Robotaxi performing a flawless U-turn with no hesitation, and then smoothly switching lanes to take a turn.
Another video on X shows FSD’s updated confidence in navigating a complex parking lot for a precise drop-off. Today’s builds can sometimes struggle in parking lots, being slow and overly cautious when not needed, or too confident elsewhere. This appears to have been improved in these Robotaxi FSD builds with improved path planning and confidence.
Tesla Robotaxi service is just so smooth. Handles parking lots very well, noticeably better than the competitors pic.twitter.com/D5OxSrajCW
We’re also likely to see FSD begin to handle more complex destination options, including parking garages and driveways, which have been promised features for almost a year. The Robotaxi FSD build has also gained the ability to safely pull over on a road, similar to the ambulance example above, but it uses this capability to drop off and pick up passengers. This is a feature that was mentioned in FSD v13.2’s Upcoming Improvements section.
Better Nighttime Performance
Driving at night presents additional challenges, including headlight glare and reduced visibility. The latest version of FSD appears to handle it with almost the same grace as it does during the day. Remember that Tesla’s Robotaxis are available up until midnight. Early access riders mentioned that FSD is far smoother and is a step up from the behavior of current FSD builds.
Impressive nighttime performance from Tesla Robotaxi, dropping us off at In-N-Out as smoothly as it did during the day. pic.twitter.com/yQOhphtR0q
Now, what happens when a passenger feels unsafe or has a critical question? Tesla has placed two key buttons on the rear screen for just those purposes. Users are given control over the ability to Call Support, which almost instantly connects them with a real human agent at Tesla’s Robotaxi Operations Center via video call.
Here’s what happens when you hit the support button in Tesla’s Robotaxi’s.
While it isn’t a fundamental driving feature, it does mean that Tesla’s team can provide support to Robotaxi vehicles remotely, like issuing directive commands to have a vehicle proceed straight, rather than attempting to turn through a gated community.
The other option, Pull Over, allows a rider to immediately request the vehicle to safely pull over, which it will do when it can find a safe and open location. At this point, you can either continue your trip or get out of the Robotaxi.
Both options prompt you with an “Are You Sure?” button before letting you continue, which means you won’t have your Robotaxi ride come to an abrupt stop if you tap the ‘Pull Over’ button by accident.
What This Means for Tesla Owners
These features are likely to be included in future FSD builds. This is essentially the new benchmark by which to judge FSD, at least once it begins rolling out to customer vehicles.
Many of the core driving improvements, such as the more confident maneuvering and emergency vehicle response, will make their way to the wider fleet in upcoming FSD updates.
Remember - Robotaxi isn’t just a service, it is also a preview of Tesla’s driverless FSD builds.
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