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With Christmas right around the corner, we’ve already seen switches to new holiday sales during December’s first week. Today’s Green Deals is led by another early Christmas sale, this one coming from Heybike that is increasing savings by $100 across a few e-bike models, with the Ranger S Folding e-bike retaining its $999 Black Friday low that we saw at the tail-end of the seasonal sale. Coming right behind it is Worx’s Landroid M 20V Robotic Lawn Mower hitting a new $539 low and UGREEN’s PowerRoam 1200 and PowerRoam 2200 Portable Power Stations dropping to their Amazon lows starting from $495. Lastly, we have Hoverfly’s GXL Max Electric Scooter offering a non-bank-breaking new low price of $360 for commuters on a budget, as well as a video review of Ottolock’s SIDEKICK Folding e-bike lock too. Plus, all the other hangover Green Deals are in the links at the bottom of the page, like yesterday’s early Christmas Hiboy EV sale, and more. You’ll also find all the hangover Green Deals from Black Friday/Cyber Monday sales collected together in our dedicated shopping hub for you.

Head below for other New Green Deals we’ve found today and, of course, Electrek’s best EV buying and leasing deals. Also, check out the new Electrek Tesla Shop for the best deals on Tesla accessories.

Heybike early Christmas sale increases savings on e-bikes with bonus free gear – deals start from $999

Heybike has launched its early Christmas savings event that is increasing the savings from its Black Friday sales with an additional $100 taken off several models, with the Ranger S Folding e-bike retaining its earlier low at $999 shipped. Normally this model would run you $1,499, with most of the discounts we’ve seen over 2024 taking costs down to $1,199 until Black Friday when it fell to the $999 low. That same rate is returning here today, slashing $500 off the price tag and giving you an affordable commuter solution at the lowest rate we have tracked.

A great option for newbie and veteran riders who are looking for an affordable commuter, Heybike’s Ranger S Folding e-bike provides a choice between either a 750W rear hub motor (peaking at 1,400W) or an upgraded 1,000W rear hub motor (peaking at 1,800W and coming in $300 higher), depending on how much speed and/or incline-climbing power you desire. You’ll get a 692Wh battery to power either option, which works with the five PAS levels – supported by a cadence sensor on the 750W model or a superior torque sensor on the 1,000W model – to provide up to 55 miles of assistance. You’ll enjoy top speeds of 28 MPH for the standard model while the upgraded model boasts a faster 32 MPH top speed.

There’s an improved 4A charger that comes along with either of the Ranger S Folding e-bike options, delivering twice as fast charging speeds as average chargers on the market, cutting down your wait for a full battery to just four hours. There are plenty of solid features here too, like the folding step-thru frame, the 20-inch fat tires that come with fenders over top each, an LED headlight, an LED taillight with brake lighting that’s been integrated into the rear cargo rack, a hydraulic front suspension fork, hydraulic disc brakes, and a smart LCD display, among others.

More Heybike early Christmas e-bike deals:

  • Mars 2.0 Folding Fat-Tire e-bike: $999 (Reg. $1,499)
    • 28 MPH for up to 45 miles
    • 1,000W motor (32 MPH speed) costs $100 more
    • comes with free front basket and large basket + gift pack
  • Cityrun Urban Commuter e-bike: $999 (Reg. $1,599)
    • 21 MPH for up to 55 miles
    • comes with free large basket + gift pack
  • Hauler Cargo e-bike (new model): $1,399 (Reg. $1,899)
    • 28 MPH for either 55
    • Dual-battery (85-mile range) costs $300 more
    • comes with free large rear basket + gift pack
  • Brawn Off-Road e-bike: $1,399 (Reg. $1,799)
    • 28 MPH for 65 miles
    • comes with free large basket + gift pack
  • Tyson Uni-Body e-bike: $1,399 (Reg. $1,699)
    • 28 MPH for 55 miles
    • comes with free large basket + gift pack
  • Horizon Full-Suspension e-bike: $1,399 (Reg. $1,999)
    • 28 MPH for 55 miles
    • comes with free front basket and large basket + gift pack
  • Hero Carbon-Fiber All-Terrain e-bike (new model): $2,499 (Reg. $2,599)
    • 35 MPH for 60 miles
    • comes with free large basket + gift pack
Worx Landroid robot lawn mower

Worx’s Landroid M 20V robotic lawn mower handles up to 1/4 acre of yard duties at a new $539 low

We just spotted a post-Black Friday surprise from Amazon on the Worx Landroid M 20V Robotic Lawn Mower for $539 shipped. Carrying a $1,200 price tag direct from Worx, but more recently seen down around $719 on Amazon since August, we mostly saw this model keep above this new going rate when discounted for 2024, with the S 20V model often leading the pack in savings, though for the second time, we’re seeing it come in at a higher rate. During recent Black Friday sales, it dropped down to the former (and short-lived) $540 low, which is getting beaten out here today by $1, giving you the new lowest price we have tracked while saving you $661 in total off its direct-from-Worx-pricing.

The middle child of the three sizes of this series of Worx Landroid robotic mowers, the M 20V tackles yard duties for up to 1/4 acres. It features an advanced AI that keeps it on the most efficient routes around your yard, with it smart enough to know when to raise and lower its floating blade for clearance over uneven terrain. All you have to do is lay down the boundary wire, measure your lawn with the companion app, and let its autonomous systems kick in and go. You’ll have a full array of remote smart controls via Wi-Fi or Bluetooth – plus, a nice little versatile design is the robot’s batteries being part of Worx’s PowerShare ecosystem, letting you interchange them with other tools from the brand that you already have in your arsenal. And while its body does come rain-resistant, its been equipped with a rain sensor to delay mowing until the grass reaches a certain dryness.

It seems like there’s some further price shifting happening lately which might lead to new permanent pricing, as the L 20V Landroid is currently sitting at $715.86 shipped. Since summer we’ve been seeing it more regularly fetching $900 after falling from its $1,150 MSRP, and while we did see it go lower during Black Friday sales, this is still a solid $184 slashed off its recent pricing. This model delivers the same features and design as the above model, with one difference: it tackles yards up to 1/2 acre in size.

UGREEN PowerRoam 1200 LiFePO4 power station

UGREEN’s PowerRoam 1200 LiFePO4 power station falls to $495 Amazon low in post-Black Friday savings

UGREEN’s official Amazon storefront is offering its PowerRoam 1200 Portable Power Station for $495.38 shipped, with a 38% discount being automatically applied at checkout. This backup power solution normally goes for $799 at Amazon, with a higher $999 price tag directly from UGREEN. We’ve seen this same discount twice before, back at the tail-end of July and during October’s Prime Day event, giving us a third appearance here today. While we did spy it hit a $389 low in a limited offer from Wellbots during early Black Friday sales, you’re still looking at a solid $304 being taken off the price tag here, landing it at the lowest price we have tracked on Amazon and the second-lowest price overall.

Bringing home the PowerRoam 1200 entails adding a 1,024Wh LiFePO4 battery capacity to your life, which dishes out juice to devices and appliances alike at up to 2,500W output through its 13 ports. The battery is quick to recharge to 80% in just 50 minutes when plugged into a wall outlet, with a full charge taking up to 1.5 hours. Adding two 200W solar panels to the mix lets you utilize its solar charging functionality which takes about three to four hours to refuel the battery. And of course, you’ll be getting the usual array of smart controls through the companion app via a Wi-Fi or Bluetooth connection.

There’s also the larger UGREEN PowerRoam 2200 Portable Power Station that Amazon is offering for $1,311.18 shipped, with a 18% discount being automatically applied at checkout. This model provides a 2,048Wh LiFePO4 capacity that can be expanded up to 12,000Wh when hooked up to five expansion batteries (sold separately), pumping out up to 3,500W to cover even higher wattage appliances through its 16 port options. It features the brand’s PowerZip technology letting it recharge at similar speeds as its smaller counterpart despite the larger size, as well as a max 1,200W solar input, smart controls through the app, and a 4-wheel detachable trolley design for easier transport.

Ranger S Folding e-bike

Get 16 miles of commuting power on Hoverfly’s GXL MAX electric scooter at new $360 low

Amazon is offering folks an affordable entry-level commuting solution in the Hoverfly GXL MAX Electric Scooter that is down at $359.99 shipped. Normally priced at $500, we’ve been seeing some frequent discounts in the last few months that have brought costs down far lower, with prices kept above $424 up through Black Friday. Those prices are getting eclipsed here today by this 28% markdown that slashes $140 out of the equation and lands it at a new all-time low rate.

You don’t have to break the bank to score a reliable way to get around, and Hoverfly’s GXL MAX delivers solid commuting support with its 300W motor powered by the 36V 7.8Ah battery. You’ll be able to cruise at up to 15.5 MPH top speeds for up to 16 miles on a single charge, with inclines up to 10% being of no concern, which is pretty standard for an e-scooter. On top of this, it comes with anti-flat 10-inch honeycomb, shock-absorbing tires for more comfortable riding, while also weighing in at just 35 pounds, making it easily manageable to carry up and down stairs or into your place of work to charge before heading home later.

SIDEKICK Folding lock from Ottolock, designed specifically for e-bikes… Check out our full video review

Best ongoing e-bike deals!

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Best new Green Deals landing this week

The savings this week are also continuing to a collection of other markdowns. To the same tune as the offers above, these all help you take a more energy-conscious approach to your routine. Winter means you can lock in even better off-season price cuts on electric tools for the lawn while saving on EVs and tons of other gear.

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Environment

‘Repowering’ era for America’s aging wind energy industry begins, despite Trump’s effort to kill it

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12 hours ago

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April 27, 2025

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'Repowering' era for America's aging wind energy industry begins, despite Trump's effort to kill it

Jeffrey Sanders / 500px | 500px | Getty Images

On Inauguration Day, President Donald Trump issued an executive order indefinitely halting permits for new onshore wind energy projects on federal land, as well as new leases for offshore wind farms in U.S. coastal waters. The action not only fulfilled Trump’s “no new windmills” campaign pledge, but struck yet another blow to the wind industry, which has been hit hard over the past few years by supply chain snags, price increases upending project economics, public opposition and political backlash against federal tax credits, especially those spurring the fledgling offshore wind sector.

Nonetheless, the nation’s well-established onshore wind industry, built out over several decades, is generating nearly 11% of America’s electricity, making it the largest source of renewable energy and at times last year exceeding coal-fired generation. On April 8, the fossil-fuels-friendly Trump administration took measures to bolster coal mining and power plants, but as the infrastructure driving wind energy ages, efforts to “repower” it are creating new business opportunities for the industry’s key players.

This repowering activity has emerged as a bright spot for the wind industry, giving a much-needed boost to market leaders GE Vernova, Vestas and Siemens Gamesa, a subsidiary of Munich-based Siemens Energy. Following several challenging years of lackluster performance — due in particular to setbacks in both onshore and offshore projects — all three companies reported revenue increases in 2024, and both GE Vernova and Siemens stock have moved higher.

GE Vernova, spun off from General Electric a year ago, led overall onshore wind installations in 2024, with 56% of the U.S. market, followed by Denmark’s Vestas (40%) and Siemens Gamesa (4%).

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GE Vernova stock performance over the past one-year period.

According to the U.S. Energy Information Administration, installed wind power generating capacity grew from 2.4 gigawatts (GW) in 2000 to 150.1 GW as of April 2024. Although the growth rate for launching new greenfield onshore wind farms has slowed over the last 10 years, the U.S. is still poised to surpass 160 GW of wind capacity in 2025, according to a new report from energy research firm Wood Mackenzie.

There currently are about 1,500 onshore wind farms — on which more than 75,600 turbines are spinning — across 45 states, led by Texas, Iowa, Oklahoma, Illinois and Kansas. Virtually all of the wind farms are located on private land, and many of the largest ones are owned and operated by major energy companies, including NextEra Energy, RWE Clean Energy, Pattern Energy, Clearway Energy, Xcel Energy and Berkshire Hathaway‘s MidAmerican Energy, which generates 59% of it renewable energy from wind, including 3,500 turbines operating across 38 wind projects in Iowa.

A growing number of the turbines are 20-plus years old and nearing the end of their lifecycle. So increasingly, operators have to decide whether to upgrade or replace aging turbines’ key components, such as blades, rotors and electronics, or dismantle them altogether and erect new, technologically advanced and far more efficient models that can increase electricity output by up to 50%.

“What’s becoming clear is that more and more of the U.S. installed base [of onshore turbines] has exceeded its operational design life,” said Charles Coppins, research analyst for global wind at Wood Mackenzie, “and now operators are looking to replace those aging turbines with the latest [ones].”

To date, approximately 70 GW of onshore wind capacity has been fully repowered in the U.S., according to Wood Mackenzie, while an additional 12 GW has been partially repowered. The firm estimates that around 10,000 turbines have been decommissioned and that another 6,000 will be retired in the next 10 years, Coppins said.

Damaged wind turbine that was first hit by a tornado then lightning.

Ryan Baker | Istock | Getty Images

Beyond the fact that aged-out turbines need to be upgraded or replaced, repowering an existing wind farm versus building a new site presents economic benefits to operators and OEMs. To begin with, there’s no need to acquire property. In fact, in certain situations, because today’s turbines are larger and more efficient, fewer turbines are needed. And they’ll generate additional electricity and have longer lifecycles, ultimately delivering higher output at a lower cost.

Even so, “there are some limitations on how much capacity you could increase a project by without having to go through new permitting processes or interconnection queues” to the power grid, said Stephen Maldonado, Wood Mackenzie’s U.S. onshore analyst. As long as the operator is not surpassing the allowed interconnection volume agreed to with the local utility, they can add electricity to the project and still send it to the grid.

Public opposition, Maldonado said, may be another hurdle to get over. Whether it’s a new or repower wind project, residents have expressed concerns about environmental hazards, decreased property values, aesthetics and general anti-renewables sentiment.

RWE, a subsidiary of Germany’s RWE Group, is the third largest renewable energy company in the U.S., owning and operating 41 utility-scale wind farms, according to its CEO Andrew Flanagan, making up 48% of its total installed operating portfolio and generating capacity, which also includes solar and battery storage.

One of RWE’s two repower projects underway (both are in Texas), is its Forest Creek wind farm, originally commissioned in 2006 and featuring 54 Siemens Gamesa turbines. The project will replace them with 45 new GE Vernova turbines that will extend the wind farm’s life by another 30 years once it goes back online later this year. Simultaneously, RWE and GE Vernova are partnering on a new wind farm, immediately adjacent to Forest Creek, adding another 64 turbines to the complex. When complete, RWE will deliver a total of 308 MW of wind energy to the region’s homes and businesses.

Flanagan noted that the combined projects are related to increased electricity demands from the area’s oil and gas production. “It’s great to see our wind generation drive the all-of-the-above energy approach,” he said. What’s more, at its peak, the repower project alone will employ 250 construction workers and over its operating period bring in $30 million in local tax revenue, he added.

In turn, the twin projects will support advanced manufacturing jobs at GE Vernova’s Pensacola, Florida, facility, as well as advancing the OEM’s repower business. In January, the company announced that in 2024 it received orders to repower more than 1 GW of wind turbines in the U.S.

Koiguo | Moment | Getty Images

Siemens Gamesa has executed several large U.S. repowering projects, notably MidAmerican’s expansive Rolling Hills wind farm in Iowa, which went online in 2011. In 2019, the company replaced 193 older turbines with 163 higher-capacity models produced at its manufacturing plants in Iowa and Kansas.

Last year, Siemens Gamesa began repowering RWE’s 17-year-old Champion Wind, a 127-MW wind farm in West Texas. The company is upgrading 41 of its turbines with new blades and nacelles (the housing at the top of the tower containing critical electrical components) and adding six new turbines.

In early April, Clearway announced an agreement with Vestas to repower its Mount Storm Wind farm in Grant County, West Virginia. The project will include removing the site’s 132 existing turbines and replacing them with 78 new models. The repower will result in an 85% increase in Mount Storm’s overall electricity generation while using 40% fewer turbines.

Preparing for ‘megatons’ of turbine recycling and tariffs

Another benefit of repowering is invigorating the nascent industry that’s recycling megatons of components from decommissioned turbines, including blades, steel, copper and aluminum. Most of today’s operational turbines are 85% to 95% recyclable, and OEMs are designing 100% recyclable models.

While the majority of mothballed blades, made from fiberglass and carbon fiber, have historically ended up in landfills, several startups have developed technologies recycle them. Carbon Rivers, for example, contracts with the turbine OEMs and wind farm operators to recover glass fiber, carbon fiber and resin systems from decommissioned blades to produce new composites and resins used for next-generation turbine blades, marine vessels, composite concrete and auto parts.

Veolia North America, a subsidiary of the French company Veolia Group, reconstitutes shredded blades and other composite materials into a fuel it then sells to cement manufacturers as a replacement for coal, sand and clay. Veolia has processed approximately 6,500 wind blades at a facility in Missouri, and expanded its processing capabilities to meet demand, according to David Araujo, Veolia’s general manager of engineered fuels.

Trump’s new-project moratorium isn’t his only impediment to the wind industry. The president’s seesaw of import tariffs, especially the 25% levy on steel and aluminum, is impacting U.S. manufacturers across most sectors.

The onshore wind industry, however, “has done a really good job of reducing geopolitical risks,” said John Hensley, senior vice president for markets and policy analysis at the American Clean Power Association, a trade group representing the clean energy industry. He cited a manufacturing base in the U.S. that includes hundreds of plants producing parts and components for turbines. Although some materials are imported, the investment in domestic manufacturing “provides some risk mitigation to these tariffs,” he said.

Amidst the headwinds, the onshore wind industry is trying to stay focused on the role that repowering can play in meeting the nation’s exponentially growing demand for electricity. “We’re expecting a 35% to 50% increase between now and 2040, which is just incredible,” Hensley said. “It’s like adding a new Louisiana to the grid every year for 15 years.”

GE Vernova CEO Scott Strazik recently told CNBC’s Jim Cramer that the growth of the U.S.’s electric load is the largest since the industrial boom that followed the end of the second world war. “You’ve got to go back to 1945 and the end of World War II, that’s the infrastructure buildout that we’re going to have,” he said. 

As OEMs and wind farm developers continue to face rising capital costs for new projects, as well as a Trump administration averse to clean energy industries, “repowering offers a pathway for delivering more electrons to the grid in a way that sidesteps or at least minimizes some of the challenges associated with all these issues,” Hensley said.

Vestas CEO says wind turbine manufacturer is ‘well positioned’ amid tariff concerns

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Environment

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

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1 day ago

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April 26, 2025

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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. 

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

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1 day ago

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April 26, 2025

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Whisper Aero ultralight aircraft scores 0K for

Whisper's "UltraQuiet" propulsion system to power acrobatic glider

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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