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Tesla released a white paper on its new string solar inverter and claims that it is much cheaper than competing inverter solutions from Enphase and SolarEdge.

In 2021, Tesla launched its own solar inverter for the first time.

Over the last few years, the company has started to integrate it increasingly into its own solar installations, and it also supplies it to other solar installers through its certified installer program.

Electrek has now obtained a white paper about its solar inverter that Tesla has been sharing around.

Tesla explained in the white paper’s summary:

Tesla’s mission is to accelerate the world’s transition to sustainable energy. To speed up the adoption of solar and storage in the residential energy sector, we’ve focused on providing products specifically designed for both the system owner and the installer. To develop the Tesla Solar Inverter, we leveraged our deep industry experience to design an inverter that offered the best value for system owners, while being easy to install, maintain, and service.

Tesla’s main claim in the paper is that its string inverter solution is cheaper at the purchase and through the Levelized Cost of Energy (LCOE).

Tesla claims its new solar inverter is much cheaper than the competition

In the paper, Tesla admits that its solution results in a lower production by about 1 or 2%:

We then assessed the real-world performance data of these sites to characterize the effects of inverter type on the system’s output. We compared actual system performance data of sites with different inverter types but similar SES, ensuring only similar roofs were compared. For the homes that are good for solar (SES 6-10), sites that used optimizers saw energy production gains of 1-2% compared to homes that used Tesla Solar Inverters. When comparing the cost of Tesla Solar Inverter with MLPEs, it begged the question whether the production gains were worth the increased cost of the MLPEs.

The leading solar inverter company using optimizers is SolarEdge, which Tesla mentions in the white paper and appears to compare its solution to in this case.

Electrek contacted SolarEdge for a comment on the comparison, and we will update if we get an answer.

In the paper, Tesla claims that the trade-off for the lower output was worth it since its analysis resulted in a 6% lower Levelized Cost of Energy (LCOE):

To answer this question, an LCOE analysis was performed to compare two 8 kW solar systems4. In the base-case scenario, our analysis found that the Tesla system had a 6% lower LCOE for the most common SES5. We also found that, for 93% of sites in the sample, Tesla had a lower LCOE. The difference in LCOE is driven entirely by higher inverter equipment costs. Further, the gap between LCOEs for SES 8 roofs expands to approximately 15% after factoring in the potential failures of optimizers during the service life6. These findings prove that over the system’s lifetime, the Tesla Solar Inverter will provide energy at a better value for most customers.

Tesla also claims that its string solar inverter results in benefits for installers in terms of ease of installation and site design process.

Here’s the full white paper:

Electrek’s Take

The white paper reads more like a sale brochure than a scientific paper, but it doesn’t mean that the data is inaccurate.

I also found it interesting that the white paper also focused on the “Tesla ecosystem”:

For the customer, Tesla Solar Inverter completes their Tesla ecosystem. System owners use a single app to monitor and manage their entire home energy system. Instead of sorting through multiple apps to make sure all devices are working properly, the Tesla app displays all Tesla products, including solar, Tesla vehicles, and charging. The intuitive app experience allows the customer to view and manage home energy usage across these devices, with the system optimizing for savings and efficiency. As new features are developed, they are automatically made available in the Tesla app, ensuring customers can unlock the full potential of their home energy system.

We have been seeing a shift in Tesla’s solar business lately where the company appears to be focusing more on providing its ecosystem supported mainly by the Powerwall, and now, the solar inverter.

I think eventually that might be Tesla’s primary approach to achieving scale with its new Tesla Electric business.

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ABB is bringing its new, 1.2 MW modular truck chargers to ACT Expo

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ABB is bringing its new, 1.2 MW modular truck chargers to ACT Expo

Capable of delivering up to 1,200 kW of power to get electric commercial trucks back on the road in minutes, the new ABB MCS1200 Megawatt Charging System is part of an ecosystem of electric vehicle supply equipment (EVSE) that ABB’s bringing to this year’s ACT Expo.

ABB E-mobility is using the annual clean trucking conference to showcase the expansion of its EVSE portfolio with three all-new charger families: the field-upgradable A200/300 All-in-One chargers, the MCS1200 Megawatt Charging System for heavy-duty vehicles shown (above), and the ChargeDock Dispenser for flexible depot charging.

The company said its new product platform was built by applying a computer system-style domain separation to charger design, fundamentally improving subsystem development and creating a clear path forward for site and system expansion. In other words, ABB is selling a system with both future-proofing and enhanced dependability baked in.

“We have built a system by logically separating a charger into four distinct subsystems … each functioning as an independent subsystem,” explains Michael Halbherr, CEO of ABB E-mobility. “Unlike conventional chargers, where a user interface failure can disable the entire system, our architecture ensures charging continues even if the screen or payment system encounters issues. Moreover, we can improve each subsystem at its own pace without having to change the entire system.”

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The parts of ABB’s new EVSE portfolio that have been made public so far have already been recognized for design excellence, with the A400 winning the iF Gold Award and both the A400 and C50 receiving Red Dot Design Awards.

New ABB chargers seem pretty, good

ABB’s good-looking family; via ABB.

ABB says the systemic separation of its EVSE enhances both reliability and quality, while making deployed chargers easier to diagnose and repair, in less time. Each of the chargers’ subsystems can be tested, diagnosed, and replaced independently, allowing for quick on-site repairs and update cycles tailored to the speed of each systems’ innovation. The result is 99% uptime and a more future-proof product.

“The EV charging landscape is evolving beyond point products for specific use cases,” continued Halbherr. “By implementing this modular approach with the majority of our R&D focused on modular platforms rather than one-off products … it reduces supply chain risks, while accelerating development cycles and enabling deeper collaboration with critical suppliers.”

Key markets ABB is chasing

HVC 360 Charge Dock Dispenser depot deployment; via ABB.
  • PUBLIC CHARGING – with the award winning A400 being the optimal fit for high power charging from highway corridors to urban locations, the latest additions to the A-Series All-in-One chargers offer a field-upgradable architecture allowing operators to start with the A200 (200kW) with the option to upgrade to 300kW or 400kW as demand grows. This approach offers scalability and protects customer investment, leading to Total Cost of Ownership (TCO) savings over 10 years.
  • PUBLIC TRANSIT AND FLEET – the new Charge Dock Dispenser – in combination with the already in market available HVC 360 – simplifies depot charging with a versatile solution that supports pantograph-, roof-, and pedestal charging options with up to 360kW of shared power and 150m/490 ft installation flexibility between cabinet and dispensers. The dispenser maintains up to 500A output.
  • HEAVY TRUCKS – building the matching charging infrastructure for commercial vehicles and fleets represents a critical innovation frontier on our journey to electrify transportation. Following extensive collaboration with industry-leading truck OEMs, the MCS1200 Megawatt Charging System delivers up to 1,200kW of continuous power — 20% more energy transfer than 1MW systems — providing heavy-duty vehicles with purpose-built single-outlet design for the energy they need during mandatory driver breaks. To support other use cases, such as CCS truck charging, a dual CCS and MCS option will also be available.
  • RETAIL – the award winning C50 Compact Charger complements the family as the slimmest charger in its category at just 9.3 inches depth, optimized for convenient charging during typical one-hour retail experiences. With its large touch display, the C50 takes the award-winning A400 experience even further — setting a new standard for consumer experience and very neatly echoing our own take on that “Goldilocks” timing zone for commercial charging.

ABB says that the result of its new approach are chargers that offer 99% plus uptime — a crucial statistic for commercial charging operations and a key factor to ensuring customer satisfaction. The new ABB E-mobility EVSE product family will be on display for the first time at the Advanced Clean Transportation Expo (ACT Expo) in Anaheim, California next week, then again at Power2Drive in Munich, Germany, from May 7-9.

Electrek’s Take

BEV trucks and buses at ACT Expo in Long Beach; image by the author.
ACT Expo test drives; by the author.

The ACT Expo is one of – if not the most important sustainable trucking event in North America, featuring all the big names in heavy trucks, construction equipment, material handling, infrastructure – even Tier 1 suppliers. Mostly, though, it’s many fleet buyers’ only chance to test drive these zero emission trucks before writing a big PO (which just makes it even more important).

Electrek will be there again this year, and we’ll be bringing you all the latest news from press events and product reveals as it happens.

SOURCE | IMAGES: ABB E-mobility.


If you’re considering going solar, it’s always a good idea to get quotes from a few installers. To make sure you find a trusted, reliable solar installer near you that offers competitive pricing, check out EnergySage, a free service that makes it easy for you to go solar. It has hundreds of pre-vetted solar installers competing for your business, ensuring you get high-quality solutions and save 20-30% compared to going it alone. Plus, it’s free to use, and you won’t get sales calls until you select an installer and share your phone number with them. 

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Whisper Aero ultralight aircraft scores $500K for “UltraQuiet” electric jet motor tests

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Whisper Aero ultralight aircraft scores 0K for

Along with Tennessee Tech, Tennessee-based ultralight aircraft company Whisper Aero has secured a $500,000 grant to help advance the company’s innovative electric jet motor concept off the drawing board and onto the testing phase.

Earlier this month, the Tennessee Department of Economic and Community Development (TNECD) announced plans to award $500,000 to Tennessee Tech and Whisper Aero through the Transportation Network Growth Opportunity (TNGO) initiative.

“We look forward to using these award dollars to place students in internships working directly with Whisper Aero leaders,” said Tennessee Tech President Phil Oldham. “By learning from an electric propulsion innovator like Whisper Aero, our students will gain invaluable perspective and can take what they have learned in the classroom and apply it right here in Tennessee.”

The grant will see a Whisper Aero glider fitted with a pair of the company’s eQ250 electric-powered jet “propulsors” for UltraQuiet flight. Tennessee Tech faculty and students will carry out copper-bird ground testing to ensure the safe integration of engines, batteries, and controllers, and kickstart Tennessee Tech’s new Crossville Mobility Incubator.

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Those propulsors, by the way, are super cool.

UnltraQuiet WhisperDrive; via Whisper Aero.

Whisper Aero’s main claim to fame is its innovative UltraQuiet WhisperDrive (above). It’s effectively an electrically spun ducted fan jet engine that uses a large number of stiff composite fan blades inside a lightweight, acoustically treated duct. With so many blades, the Whisper Aero propulsor can push more air than a conventional prop while spinning much more slowly. As such, the “blade passage frequency” moves up to more than 16,000 Hz – outside the range of most human hearing but not, supposedly, high enough to freak out the beagles.

The Whisper Aero ultralight is effectively an Aériane Swift3 glider fitted with a pair of Whisper’s eQ250 propulsors, each capable of up to 80 lbs. of thrust. The Ultralight has a wingspan of over 40 ft with a maximum L/D of 35:1 and can be stressed to a design loading of +6/-4g, making it capable of some pretty impressive acrobatic feats.

The Swift3 glider is designed for a low speed, low power cruising speed of 45–55 knots with “just” 6.5 hp. Power-off glides from a few hundred feet showed a low sink rate, and a climb rate of 1,250 ft/min with full self-launching power (in other words: the Whisper glider doesn’t have to be towed by a launch vehicle, like a conventional ultralight glider).

Quiet cool

Dual WhisperDrive fans deliver ~160 lbf of thrust; via Whisper Aero.

Range under full power is about 109 miles with current battery tech, but it’s expected that range under the latest EPiC 2.0 energy batteries would rise to nearly 170 miles.

Nathan Millecam, CEO of Electric Power System, said, “EPiC 2.0’s leap in energy density and thermal performance has enabled a significant increase in range, a clear validation of our next-gen cell technology. We are impressed by what the Whisper team continues to achieve in advancing electric aviation.”

The press release concludes explaining that flight tests are expected to show that the Whisper Aero glider can be flown, “a few hundred feet away from neighborhoods without any disturbances, while carrying a 220 lbs. payload with full range,” which is all kind of ominous in today’s political climate, but still pretty neat from a purely tech perspective.

The TNGO grant follows a separate grant from NASA awarded last year, though that grant aims to develop the eQ250s – not as a propulsion system, but as a key component in future spacecraft ventilation systems.

Tennessee Tech announces TNGO grant

With support from TNECD’s Transportation Network Growth Opportunity (TNGO) initiative, Tennessee Tech University and Whisper Aero are partnering to advance next-generation propulsion technology in the aerospace industry. This collaboration will enhance aerospace research and workforce development, ensuring Tennessee remains a leader in cutting-edge mobility solutions.

TNECD

SOURCE | IMAGES: TNECD; via eVTOL Insights, New Atlas.


If you’re considering going solar, it’s always a good idea to get quotes from a few installers. To make sure you find a trusted, reliable solar installer near you that offers competitive pricing, check out EnergySage, a free service that makes it easy for you to go solar. It has hundreds of pre-vetted solar installers competing for your business, ensuring you get high-quality solutions and save 20-30% compared to going it alone. Plus, it’s free to use, and you won’t get sales calls until you select an installer and share your phone number with them. 

Your personalized solar quotes are easy to compare online and you’ll get access to unbiased Energy Advisors to help you every step of the way. Get started here.

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Tesla Cybertruck owner gets stuck after beliving Elon Musk’s ‘river crossing’ claim

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Tesla Cybertruck owner gets stuck after beliving Elon Musk's 'river crossing' claim

A Tesla Cybertruck owner believed Elon Musk’s claims that the Cybertruck would be able to “act as a boat” and “cross rivers”, and he got his $100,000 stuck because of it.

Elon Musk has often made claims about how Tesla vehicles could float and briefly serve as a boat in the past.

We have never been taken too seriously because Tesla’s warranty states something different about taking the vehicle into water.

However, the CEO doubled down on the claim specifically for the Cybertruck.

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Ahead of launching the production version of the Cybertruck, Musk claimed the vehicle would be “waterproof enough” to serve as a boat and cross rivers:

Cybertruck will be waterproof enough to serve briefly as a boat, so it can cross rivers, lakes and even seas that aren’t too choppy.

The CEO added that the goal is for a Cybertruck to be able to cross the water between SpaceX’s Starbase and South Padre Island in Texas, which is about 360 meters (1,100 feet).

We have been taking the Cybertruck more seriously with water because we learned that Tesla built a ‘wade mode’ for the truck to be able to go into the water. Tesla says the mode increases the ride height to the max and temporarily “pressurizes the battery pack.”

The problem is that it is activated through the off-roading mode, which is not covered under Tesla’s warranty – so we are taking everything with a grain of salt.

Whenever Tesla’s warranty contradicts what Musk says, it is better to follow to the warranty.

A Tesla Cybertruck owner in Truckee, California, appears not to have received this sage advice since they activated the wade mode and attempted to get into the water.

The Cybertruck owner quickly got stuck. The local California Highway Patrol (CHP) shared some pictures of the aftermath (via Facebook):

CHP Truckee helped with the recovery and commented on the incident:

Cybertruck activated “Wade Mode”… and waded a bit too far… We’re all for testing boundaries… but maybe not the waterline. Remember folks, “Wade Mode” isn’t “Submarine Mode.” If your plans include exploring the great outdoors, make sure to know your limits and the terrain.

There’s no detail on the damage to the Cybertruck, if any.

As we recently reported, repair costs for the stainless steel electric pickup truck can increase rapidly.

This Cybertruck owner is also not the first one to get stuck in water. We previously reported on a Tesla Cybertruck sinking into the water when launching a jet ski.

Electrek’s Take

At the risk of stating the obvious, this is clearly more of a user error than a Cybertruck problem.

I think the verdict is clear: Cybertruck is far from the best electric pickup truck for off-roading.

However, in general, you shouldn’t expect a truck to get out of water on a muddy bank.

I think a lot of Cybertruck owners are new to trucking and off-roading, and they are making the truck look worse than it is at off-roading.

If you want to take your Cybertruck off-road, I recommend to first go with an off-roading guide that can help avoid some simple mistakes like this.

Also, in general, don’t take Elon Musk’s claims at face value when he says that Tesla vehicles can do something that sounds like an exaggeration. It probably is an exaggeration.

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