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Tesla is going to light solar on fire

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Here we go again!

AC verses DC, much like Mac verses PC, is a tale as old as time. Battles fought, but the war never won. We use both everyday depending on the use and application. Each current has its place.

Energy is a pretty hot topic these days and solar is poised to become the next great battleground for the Current War. Much like it has always been, most people spend little time thinking about electrical currents. They plug something into something else and it typically just works. EV and solar aficionados on the other hand are keenly aware of the difference.

Here is a general and very basic reminder of the difference between the two currents: Typical solar panels, by their nature, have a direct current (DC) output. Household circuits and electric utility service lines use alternating current (AC). An inverter converts DC from a solar panel into household AC. String inverters handle the current conversion for a group of panels, while micro-inverters convert the current for each individual panel. Some panel manufacturers offer micro-inverters mounted on each panels and designate them as AC panels. In general, these two configurations have similar efficiency but offer unique sets of benefits for how they are used, installed, and maintained. It is important to note that each time current is converted to AC from DC and vice verse, there are losses in efficiency.

Batteries for solar arrays are similar to the panels in the sense that they are also DC by nature. These too need an inverter to get from DC to AC. There are even some that are packaged with built-in charger/inverters and marketed as “AC batteries”.

It is widely accepted that batteries are integral to the viability of solar as sustainable energy solution. Additionally, the best place for solar arrays are at their point of use, i.e. homes, office buildings, and garages. Battery storage is the key component for bridging the gap of time between energy production and use.

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In a residential application the Current War is a matter of how far DC should be carried into a home, when and where it should be converted, and how many times it needs converted.

As a challenge for manufacturers and system designers, every system configuration needs to be unique to the user’s needs and goals. Some solar manufacturers have addressed the different complexities by converting everything to AC as quickly as possible. This makes a system very easy to configure, install, and expand. Each panel has a micro-inverter that essentially ties into a household AC system directly. “AC batteries” compliment this system by also tying into the house AC system directly. The generation and storage can both be easily scaled up or down based on a user’s needs. Working with AC is considered safer than with DC, which add to the reasons for why this method is appealing. The downside comes from converting current twice between the panels and the batteries, resulting in a slight reduction in efficiency.

Ironically, Tesla is expected to make a big push for a very DC-focused system, integrating a bunch of functions and elements. Nikola Tesla might be turning in his grave. Their goal is to limit the current conversion to a single point at the most downstream point possible, immediately before entering the household AC system.

Everything but the motor and onboard charger in a Tesla vehicle uses DC. Supercharging is achieved through DC and bypassing the onboard charger. The Tesla Powerwall is DC. Solar panel output is DC. It’s pretty obvious why Tesla is growing it’s DC ecosystem.

Energy generation and storage stay on the same side of the inverter. Additionally, Tesla is expected to switch another element to the DC side; the vehicle wall charger. Removing the current conversion bottlenecks will enable the vehicle to charge directly from the DC home battery to the car’s DC battery. I like to think of it as a dam exploding and releasing it’s reservoir of electrons, turning a trickling stream into a raging river!

Speculation is also swirling around the idea of vehicle-to-grid power. This would open a whole new realm of possibilities. It’s hard to say what use Tesla will make of this technology, but it could be possible to use your Tesla vehicle battery to power your home if the grid fails, or even send energy back to grid during demand spikes.

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For comparison, lets look at how an AC-focused system would compare to a DC-focused system in everyday use for a house with a Tesla vehicle from the vantage of an electron (keep in mind that these two examples hardly represent the entire spectrum):

Current Conversion Points:

AC:

  • Solar panel generates DC current
  • Unused mid-day Solar DC current converted to household AC at the panel
  • Household AC converted to DC at the house battery as excess storage
  • House battery DC converted back to household AC at night to charge your vehicle
  • Household AC converted to DC in the vehicles onboard charger and sent to vehicle battery

DC:

  • Solar panel generates DC current. Unused mid-day solar DC sent to house battery as excess storage. Then the same current flows from your house battery to your car battery.

Zero conversions in the DC ecosystem compared to four conversions in the AC ecosystem. No loss of efficiency. No bottlenecks. Pretty slick, right?

Yeah, I didn’t address what happens when your DC house battery is low and you draw from the grid and need an AC to DC conversion. Tesla is expected to seamlessly integrate this capability into their system. One conversion is still better than four.

Both systems will have their share of advocates, and neither of them should be seen as universally ‘wrong’. It comes down to which configuration would best suit the needs and goals of its user. One major comparison between the two systems is the number of components and the likelihood of complete system failure should one single component stop working.

With an AC system, you have a lot of conversion points, but they are fairly independent. If one fails, the rest still work and your system can still function.

With a DC system, you may have one single inverter. If it fails, your entire system fails.

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With varying degrees of grid reliability or “prepper” mindfulness, the spectrum of system variations can address every need. The Tesla DC ecosystem will be best used by Tesla vehicle owners. The list of which is about to explode. Not unlike that electron dam.

I have a passion for all that is clean, green, responsible and logical. Because of this, I am a big Tesla enthusiast and future owner.

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Tesla Cybertruck targets job site crews with new Tailgate Utility Track and Bed Gear Box accessory

Tesla launched a $350 tailgate track and a $985 lockable Bed Gear Box for Cybertruck.

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Tesla Cybertruck construction site

Tesla’s Cybertruck team added two more items to the Tesla Shop, targeting job site crews and owners who use the truck bed for actual work rather than just showing it off. The official Cybertruck X account posted the Tailgate Utility Track and the Bed Gear Box within minutes of each other, part of a five item batch that also included a reflective jacket, a spray paint hat and an updated reflective tee.

The Tailgate Utility Track runs $350 and turns the folded down tailgate into another mounting surface. It’s a single aluminum track with a T-slot for sliding accessories and two L-track attachment points, plus two load stops included in the box. The pitch is straightforward: strap down oversized cargo, like lumber or a cooler, that hangs off the back of the bed without it sliding out mid-drive. It bolts onto the existing tailgate and works on every Cybertruck trim.

The Bed Gear Box costs $985 and is a different kind of accessory. It’s a lockable aluminum storage box, 55.78 inches long, 19.8 inches wide and 7.79 inches tall, that mounts to the bed’s L-track rails and comes with two internal bins for smaller items. According to Tesla, at just over 57 pounds empty, it’s meant to stay in place rather than come in and out with each trip, giving owners a factory-fit alternative to loose totes for tools, recovery gear or emergency supplies. Tesla’s listing notes that Long Range and Dual Motor AWD Cybertrucks need the L-Tracks accessory installed separately before the Gear Box will mount, since L-tracks come standard only on certain configurations.

Tesla Cybertruck bed gear box accessory

Tesla Cybertruck bed gear box accessory

Both accessories lean on the idea Tesla has been building toward since Elon Musk first described the Cybertruck’s third-party attachment strategy at the 2023 shareholder meeting, when he said the truck would ship with mounting points so outside companies, and Tesla itself, could keep adding gear without redesigning the bed. That’s the same L-track backbone underneath the tailgate shield and jumpseats Tesla launched last year, and the off-road armor package that arrived through the same X account in 2025.

Owners looking to round out the rest of the L-track ecosystem, cargo dividers, MOLLE panels, bed racks and similar gear, can find a wider range of options through our Cybertruck accessories collection.

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Elon Musk says he knows how to save Earth for a billion years

Elon Musk says sentient AI satellites launched from the Moon could keep Earth livable forever.

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Elon Musk spent part of his weekend describing a plan to keep the planet livable for roughly a billion years, and it starts with satellites that can think for themselves.

In a post on X, Musk argued that swapping fossil fuels for solar and wind power will not be enough to protect humanity from what he called extremely severe extinction events, the kind that occur roughly every 100 million years. His fix is what he called sentient satellites, or solar-powered satellites, controlled by AI, that would sit in a fixed spot between Earth and the Sun after being launched off the Moon using a giant electromagnetic catapult instead of rockets.

The satellites’ onboard AI would make continuous, small adjustments rather than waiting on human instructions. The mass driver is Musk’s proposed way of getting the raw material there cheaply by using an electromagnetic launch track built on the Moon, where lower gravity and no atmosphere make it far easier to fling cargo into space than it is from Earth.

Musk shared a Grok generated estimate suggesting roughly 5 percent of Florida’s land, or about 1.68 million acres, could face regular flooding by 2070 under a high sea level rise scenario, and said humanity has about 50 years to act before coastal living looks very different than it does today.

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This is not the first time Musk has floated the idea. He raised a similar concept in November, describing a solar powered AI satellite constellation that could make tiny adjustments to incoming sunlight to fine tune Earth’s temperature. Musk has also tied planetary risk to his broader vision at SpaceX, where his compensation package is explicitly linked to establishing a self-sustaining Mars colony, one he has described as an insurance policy against the kind of extinction event he referenced this weekend, and where he has said humans could set foot within five to seven years.

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Police sergeant recounts his Neuralink journey with Elon Musk’s brain chip

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A former Vancouver police sergeant with ALS accounts his journey to become a patient for Elon Musk’s Neuralink wireless brain-computer interface technology.

“I’m texting you from my brain right now.” That was the first message Lee Marten sent after waking up from Neuralink surgery, five hours and one migraine after dozens of threads were stitched into his motor cortex.

Marten, a former Vancouver police sergeant, is one of the first Canadian ALS patients to receive Neuralink’s N1 brain implant, and the 26th recipient overall. He tells his story in a first-person account published by Maclean’s.

Marten recounts how he was a healthy, athletic Vancouver police sergeant until April 2022 when symptoms of muscle twitching and balance loss, were followed by a bad fall that broke his leg. He would eventually be diagnosed with ALS in early 2025 at the age of 47. ALS, also known as Lou Gehrig’s disease, is a fatal neurodegenerative disease that progressively destroys the motor neurons controlling voluntary muscle movement, eventually taking away a patient’s ability to walk, speak, swallow and breathe. There’s no cure, and most patients live two to five years after diagnosis.

He describes the devastation of the diagnosis and how he began preparing for it while connecting with other young ALS patients through a WhatsApp group called Young Guns. Through that group he learned about a Neuralink clinical trial at Toronto Western Hospital and, after a roughly seven-month vetting process (physical assessments, psychiatric evaluation, a final interview with the Neuralink team), was accepted this past April as the trial’s 26th recipient and the first Canadian ALS patient to get the N1 implant. He recounts the May surgery in detail, including the robotic system that stitched 64 threads into his brain, and describes the app, Link, translating his neural signals into cursor control, which he was using within hours of waking up.

Marten walks through what daily use looks like, including weekly “brain training” exercises, a real-time neural-activity display, charging the implant via a beanie-mounted MagSafe charger, and using the implant for emailing, texting, social media, and gaming via a “Magic Box” that connects it to other devices. He also gives brief context on brain-computer interface history and quite candid about Musk, calling him “divisive” but saying he found him “easy to admire.

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The piece closes on a heavier note, with Marten seeking to pursue medical assistance in dying as his symptoms progressed, noting that he’ll be able to communicate his final words to his family through Neuralink rather than facing a silent decline. He expresses hope the data from his case will help future ALS patients, even without a cure in his own lifetime.

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