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The ocean was calm when the Peregrine Falcon ship left the harbor in Homer, Alaska, last month with three moorings resting on its deck, all loaded with scientific instruments.

Eighteen hours later, these moorings were lowered into the silty waves where they collected data for two months. Two of the moorings were 12-foot submarine-shaped buoys that floated 60 feet below the inlet’s surface, and the third rested on the sea floor; all three gathered data on the velocity, turbulence, and sediments at the nation’s top-ranked tidal energy site.

A highly energetic corner of the Pacific Ocean, Cook Inlet holds one of the greatest tidal resources on Earth. All that energy has the potential to reduce Alaska residents’ dependence on declining oil and gas production and provide excess renewable energy that could stimulate the Alaskan economy. That is why researchers from the National Renewable Energy Laboratory (NREL) submerged their moorings in Cook Inlet; the data they collected will help identify important details of the opportunities and challenges that come with turning these surging waters into a reliable and renewable power source for Alaskans living on the nearby shore.

But that is no easy feat.

“Models and local knowledge tell us the currents here are extremely strong. There is silt and sea ice in the winter. We expect the turbulence to be intense,” said Levi Kilcher, an NREL senior scientist who leads ocean energy resource assessments like this one.

NREL researchers and crew prepared to deploy three moorings in Cook Inlet, Alaska, in July to collect data for a potential tidal energy site. From left to right: Chris Higgins (Peregrine Falcon), Patrick Verity (Peregrine Falcon), Brian Hunt (TerraSond Limited), Frank Spada (Integral Consulting), Levi Kilcher (NREL), Andrew Smith (TerraSond Limited), Gwen Sovitski, Olivia Cormier (TerraSond Limited), Jeff Johnson (Peregrine Falcon). Photo courtesy of Christopher Pike

Capturing Energy From the Ebb and Flow

Just as wind turbines extract energy from moving air, underwater turbines can create energy from the ebb and flow of the tides. Tidal energy has the potential to provide more than 220 terawatt-hours per year of clean, renewable energy in the United States, which is enough to power 21 million homes. Tidal technologies are promising, with new demonstration projects showing the world that they can operate reliably and efficiently. And yet, it is still an early-stage industry when compared to wind and solar. As of September 2020, only three tidal turbines were operating in the United States.

“So much of our work builds on NREL’s background in wind power,” Kilcher said. “It took time to understand the importance of accounting for turbulence in wind turbine designs. We’re learning from that and getting ahead of the turbulence questions now by making these measurements. But in the ocean, there are so many additional environmental challenges: We’ve also got to deal with sea ice, sediment, marine growth — not to mention the corrosive properties of the salt water itself. So, we’re trying to understand the details of these environmental challenges as well.”

For the Cook Inlet study, Kilcher led a multilaboratory team that included researchers from Pacific Northwest National Laboratory and Sandia National Laboratories. The team also contracted help from TerraSond Limited, Ocean Renewable Power Company, and Integral Consulting. NREL has performed similar studies in Puget Sound, Washington, and off the coast of Maine, but the Alaskan environment poses unique challenges: currents that are stronger, sea ice in winter, and sediments that wash into the inlet from the glaciers dotting the nearby mountains. The turbulence stirs up sand and silt from the inlet floor, creating frothy, gray water at the surface and a slurry of sand and gravel at the bottom.

“The strong currents at the site create sand dunes on the sea floor that are 30 feet tall. Instruments have been lost at this site, most likely buried in sand,” Kilcher said. “We’ve used midwater moorings and inflatable chambers in the Tidal Bottom Lander to ensure we get this stuff back.”

Frank Spada (Integral Consulting, left) and Andrew Smith (TerraSond Limited) hold the buoy steady while Patrick Verity (Peregrine Falcon) unshackles it for a ballast test in the Homer harbor, Alaska. Photo courtesy of Christopher Pike

It is an environment Kilcher knows well. He grew up in Homer, a small fishing town on Cook Inlet where he played on the beach of these icy waters, practiced subsistence fishing, and later worked as a deckhand for his father’s freight business. He earned a Ph.D. in oceanography with a focus on ocean turbulence from Oregon State University. Ten years ago, he brought his expertise to NREL’s Water Power team to help design tidal power systems that could, one day, power his hometown.

“I’ve always been attracted to problems that seem unsolvable. Turbulence is one of those problems, and tidal energy has sometimes felt like one too, but the industry is starting to see real success,” Kilcher said.

Now, to help in the effort, Kilcher and his team are gathering some of the information needed to start designing projects in Cook Inlet. In addition to turbulence, researchers are measuring the water’s velocity, salinity, temperature, and the sediment composition and concentration. With that data, they will validate and refine models to paint a much more detailed picture of the site, including how much energy could be generated there and how to build tidal turbines that can withstand the elements.

The detailed understanding of the Cook Inlet tidal energy resource that stems from this project will allow the industry to design tidal turbines that perform reliably for decades in the harsh Cook Inlet environment. Ultimately, this work could also help design turbine arrays that maximize power production while minimizing impacts to marine life and the inlet’s ecosystems.

Transforming Alaska’s Economy With Clean, Affordable, Local Energy

Having access to clean, affordable energy would transform the Alaskan economy, which is currently facing a deep economic recession due to decreased oil and gas production and high energy prices. Alaskan residents depend on oil and gas not just for jobs and state revenue but also for heating and power. Because of their extreme climate, remote location, and lack of infrastructure, they spend twice as much on energy as the average American; many communities pay three times more, according to the Cold Climate Housing Research Center’s 2018 Alaska Housing Assessment.

The Cook Inlet site is estimated to hold as much as 18 gigawatts of tidal energy potential — more than 20 times the amount used by all the road-connected communities of Alaska.

“It’s a huge amount of power that we have access to at our doorstep,” said Chris Rose, executive director of the Renewable Energy Alaska Project, a nonprofit that advances clean energy solutions for Alaska. “The economic and environmental benefits would be immense.”

With affordable energy, local industries could process the raw materials harvested in Alaska, such as wood, minerals, and fish, rather than exporting them to places with cheaper energy prices. Communities could switch from diesel to electric power for transportation and heating. With surplus electricity, companies could even start making hydrogen as a fuel with which to export the state’s vast renewable energy resources.

Tidal power technologies are at a critical stage of development; U.S. and European companies have had increasing success in single-device demonstration projects and are now planning pilot-project arrays that demonstrate long-term reliability and scalability. Cook Inlet’s strong currents and harsh environment are ideal for demonstrating technology robustness. Given these successes, NREL engineers believe tidal technologies could make significant contributions to Alaska’s energy demand in the next decade. This would help transform and revitalize the Alaskan economy and would be a significant contribution to help meet the marine energy industry’s goal of 1 gigawatt of marine energy plants deployed by 2035.

“It’s kind of like saying to the people in Arizona 40 years ago that if solar power ever gets really cheap, we’ll have a bonanza here. Guess what? It happened.” In other words, Rose said, “the time to start investing in tidal energy is now.”

Out in Cook Inlet on the Peregrine Falcon, Kilcher deployed and successfully recovered three moorings to gather the data needed to engineer the next generation of tidal devices. When he returned to the harbor, the sun shone over the snow-covered mountains, and Kilcher looked for the humpback whales the team saw the day before. He thought about the precious data they had just collected and the device engineering it will facilitate. And he thought about the childhood dream that grew from these same waters.

I firmly believe we can find a cleaner future that’s carbon neutral — carbon negative even,” Kilcher said. “I’ve been working for 10 years to make marine energy a part of that solution.”

Find more information on NREL’s resource characterization work.

Article courtesy of National Renewable Energy Laboratory (NREL).

 

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EcoFlow Mega Sale takes 65% off power stations + new flash sale lows, Aventon e-bikes $700 off, Husqvarna tools, more

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April 4, 2025

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EcoFlow Mega Sale takes 65% off power stations + new flash sale lows, Aventon e-bikes 0 off, Husqvarna tools, more

We’re closing out this week’s Green Deals with a double-feature from EcoFlow, as the brand has launched its Members’ Mega Sale (AKA its Members’ Festival) that is running parallel to its ongoing Easter Sale with a fresh batch of offers at up to 65% off, like the DELTA Pro 3 Portable Power Station that is hitting $2,799, among others – all complete with bonus savings and rewards. On top of the initial sale, the brand is also giving us two short-term flash savings to new low prices on the RIVER 2 Pro Portable Power Station for $349 and dual DELTA Pro Smart Extra Batteries for $2,899. Aventon’s Spring Into Motion Sale getting extended, with the Abound Cargo e-bike down at $1,599, as well as its legacy discounts and a full list of its latest smart models. Lastly, we have a roundup of Husqvarna lawn care equipment seeing discounts, like the 40V 24-inch Hedge Master 320iHD60 Cordless Electric Hedge Trimmer at $270. Plus, all the other hangover Green Deals are in the links at the bottom of the page, like yesterday’s Lectric April Showers e-bike sale, Jackery’s flash offers, and more.

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.

EcoFlow Members’ Mega Sale takes 65% off additional units alongside Easter Sale offers – starting from $113

Running parallel to its ongoing Easter Sale, EcoFlow is adding some additional deals to the mix in an alternate Members’ Mega Sale through April 14 with up to 65% discounts across the lineup. Among the new offers, one that caught our eye was the newer DELTA Pro 3 Portable Power Station which has dropped down to $2,799 shipped in both sales. Normally carrying a $3,699 price tag outside of sales, the lowest we’ve seen discounts drop the costs was (without bonus savings) $2,899 in last month’s limited Spring Sale flash offers, with it going to $2,999 for Black Friday before that. Today though, we’re looking at the lowest initial price cut direct from the brand as $900 is struck from the tag, with it even matching at Amazon.

As with the case of its Easter Sale, the Members’ Mega Sale is offering the same bonus savings – all you have to do is become a member (free sign-up) before making your purchase. Let’s do a quick rundown on what you can score afterwards: a free Power Hat ($129 value) on orders over $500 or two 125W solar panels ($499 value) on orders over $3,000. You’ll also score 800 EcoCredits upon member sign-up, as well as an extra 500 for each order placed – plus, 3x the EcoCredits from purchases for standard members and 3.5x EcoCredits for Plus members. On top of all this, you can redeem already collected EcoCredits to cut 5% in additional savings from your cart’s total at checkout.

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One of the EcoFlow’s newer power stations, the DELTA Pro 3 starts off with a 4,096Wh LiFePO4 capacity that you can further bolster upwards to as high as 48,000Wh. Likewise, its starting 4,000W of output power (which surges to 6,000W) will also expand with additional equipment up to 12,000W – particularly when three power stations have been connected together. Unlike the other units under the brand’s flag, this one boasts a massive array of recharging methods: seven solo-source options and 18 combination options. Plugging it into a standard wall outlet, for example, fills you back to an 80% battery in 50 minutes, or you could take advantage of the 2,600W max solar input, EV charging, cigarette outlets in cars, dual PV charging, and much more.

There are 14 output port options to cover all your devices and appliances, one of which happens to be a TT-30R port to cover RV needs too – with you able to monitor and adjust settings and performance through the smart controls via the companion app. It’s one of the few models that’s been given the brand’s X-Core 3.0 tech, providing superior host safety, performance, and intelligence improvement. It also allows for its surging power output to climb higher for more demanding appliances while also increasing charging speeds, lessening noise and temperatures, improving the battery management system, and extending its overall lifespan – you can charge and recharge it every day for nearly 11 years, which means with less use it’ll last you many more beyond.

EcoFlow’s other DELTA Pro 3 Mega Sale deals:

EcoFlow’s Members-only Mega Sale deals:

EcoFlow’s Mega Sale hot bundles:

EcoFlow’s Mega Sale refurbished deals (use code MEM5OFF at checkout)

As mentioned before, EcoFlow’s Members’ Mega Sale is running alongside its counterpart sale through April 14, so if you don’t see anything in the offers above, be sure to head over to our Easter Sale coverage to get a look at the full array of deals. You can also currently find the brand’s new RIVER 3 Plus 286Wh LiFePO4 Power Station at a new $189 low at Amazon right now too. 

EcoFlow RIVER 2 Pro Portable Power Station

EcoFlow flash sale takes 48% off two units, with the RIVER 2 Pro 768Wh LiFePO4 power station at new $349 low

As part of its Easter Sale and the parallel Members’ Mega Sale, EcoFlow has launched the first of its limited flash sale offers that are taking up to 48% off two units. The first of these is the RIVER 2 Pro Portable Power Station that is down at $349 shipped. Normally going for $599 at full price, we’ve seen it come down as low as $359, first as part of last month’s Spring Sale and continuing through these two new sales running through April 14. The limited-time flash savings here today, though, are taking an additional $10 off the discounted rate for a total of $250 in savings at a new all-time low price.

On the larger end of EcoFlow’s RIVER series, the RIVER 2 Pro is a compact backup solution that supports you through short-term needs for campsites, road trips, and the like, with a 768Wh LiFePO4 capacity. It outputs up to 1,600W of power through its eight port options, all thanks to the X-boost tech inclusion that allows it to “run 80% of home appliances.” Last minute travel plans are far easier here too, as it can recharge in just 70 minutes with a wall outlet, alongside USB-C and car port options too. You can connect up to a maximum 220W solar input, putting it back at full via the sun’s rays in 3.5 to 4.5 hours.

The second of these offers gives you two DELTA Pro Smart Extra (expansion) Batteries for $2,899 shipped. Normally just one of these batteries at full price runs you $2,799, with the current sales’ pricing dropping things to $1,599, making this quite the steal if you’ve been wanting to expand your existing DELTA Pro setup closer to its max 25kWh capacity.

Be sure to check out the full lineup of EcoFlow’s Easter Sale deals, as well as the newly added Members’ Mega Sale deals that are both running through April 14 – with both offering bonus savings, free gear, and more.

Aventon Abound Cargo e-bike

Aventon’s extended Spring Sale gives you the cargo-hauling Abound e-bike at $1,599

Aventon has extended its Spring Into Motion sale through April 16 with up to $700 in savings off its lineup of e-bikes while also making room for its large selection of new smart models. Among the bunch, the brand’s Abound Cargo e-bike is down at $1,599 shipped. Normally you’d have to shell out $1,999 for this model, though its been more consistently keeping at $1,799 during sales since May 2024, which was also the last time we saw it brought down to $1,599. You’ll be saving $400 off the going rate here, with the option to upgrade to its newest generations, the Abound SR smart e-bike for $100 more or the Abound LR smart e-bike for $200 more, with the difference between them being the latter’s seven-inch longer cargo space with a lockable onboard storage bag and 8-pound heavier chassis.

Since its release in 2023, Aventon’s Abound Cargo e-bike has been quite the popular model. It comes with a 750W rear hub motor that peaks at 1,200W to tackle inclines and increase its cargo-hauling potential, as well as a 678.2Wh integrated battery – the combination of which provides you with top speeds of 20 MPH for up to 50 miles of travel when its four PAS levels (supported by a torque sensor) are activated. Of course, there’s also the pure electric riding option via the throttle, though you should take into consideration that this will shorten its travel range.

It comes along with plenty of solid features too, including a front suspension fork, hydraulic brakes, integrated front and rear lights with turn signal functionality, fenders over both tires, the integrated rear cargo rack with a 143-pound payload, a Shimano 7-speed derailleur, a kickstand, a storage bag, and an LCD Smart “Easy Read” display.

Aventon’s Spring Into Motion sale legacy e-bike deals:

Aventon’s newest e-bike models (no price cuts):

  • Soltera 2.5 Lightweight e-bike: $1,199
    • 20 MPH for up to 46 miles
  • Sinch 2.5 Compact Folding e-bike: $1,799
    • 20 MPH for up to 55 miles
  • Abound SR Cargo e-bike: $1,899
    • 20 MPH for up to 60 miles
    • GPS tracking, remote locking, geofencing, passcode, keyless battery, alarm system, more
  • Level 3 Smart Step-Over Commuter e-bike: $1,899
    • 20 MPH for up to 70 miles
    • GPS tracking, auto-lock, unusual movement detection, alarm system, more
  • Level 3 Smart Step-Through Commuter e-bike: $1,899
    • 20 MPH for up to 70 miles
    • GPS tracking, auto-lock, unusual movement detection, alarm system, more
  • Abound LR Cargo e-bike: $1,999
    • 20 MPH for up to 60 miles
    • 6 inches longer, 8 pounds heavier, with lockable onboard storage over SR model
    • GPS tracking, remote locking, geofencing, passcode, keyless battery, alarm system, more
Husqvarna 40V 24-inch Hedge Master 320iHD60 cordless electric hedge trimmer

Tackle heavy-duty trimmer jobs with Husqvarna’s 40V 24-inch Hedge Master 320iHD60 at $270

Amazon is now offering the Husqvarna 40V 24-inch Hedge Master 320iHD60 Cordless Electric Hedge Trimmer for $269.99 shipped. Brought down off its usual $320 price tag, this hedge trimmer is among the few electric models from under Husqvarna’s that see more regular discounts, whereas many others often only see seasonal sales pricing, like for Black Friday, Christmas, and the like. While we’ve seen this particular bundle with the battery and charger fall as low as $223 back during October’s Prime Day, you’re still looking at a solid $50 price cut down among some of its lowest rates. If you already own an appropriate battery/charger, you can score the hedge trimmer by itself for $200.

Husqvarna’s Hedge Master 320iHD60 has been equipped with a high-torque brushless motor for “increased efficiency, increased reliability, reduced noise and longer product life.” It provides you with a 24-inch reach, with your comfort taken into mind via the tri-handle grips that allow for easier heavy-duty jobs on top of longer-spanning usage. Its blades are able to handle cutting through branches up to 1-inch thick, with an un-jam button that opens the blades up for easier clearing should the unexpected happen. You can extend runtimes by using any of the brand’s interchangeable 40V batteries here too, or use the included battery in the bundle with alternative equipment you may have.

Other Husqvarna electric lawn care discounts:

Husqvarna Combi Switch/attachment discounts:

Best New Year EV deals!

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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Affirm heads for second-worst week on record on tariff worries, Klarna delayed IPO

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April 4, 2025

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Affirm heads for second-worst week on record on tariff worries, Klarna delayed IPO

Igor Golovniov | SOPA Images | Lightrocket | Getty Images

Affirm shares have plunged nearly 30% in the past two trading days and are on track to close out their second-worst week on record, following President Donald Trump’s sweeping tariff announcement on Wednesday.

Widespread tariffs could represent a particular problem for Affirm, because the provider of buy now, pay later loans is reliant on consumer spending, and economists expect prices to rise on all sorts of goods. The news got worse on Friday when Affirm rival Klarna delayed its long-anticipated IPO due to market volatility.

Klarna had planned to debut on the New York Stock Exchange under the ticker KLAR, targeting a valuation around $15 billion. Affirm’s market cap is now $11 billion. Klarna reported $2.81 billion in revenue last year, which is about what Affirm generated over the past four quarters.

In addition to Klarna, ticketing marketplace StubHub hit pause on its share sale, raising concerns that the IPO market’s expected rebound won’t be taking place anytime soon. The Nasdaq is down more than 9% this week, headed for its steepest drop since the early days of the Covid pandemic in 2020.

Read more about tech and crypto from CNBC Pro

The setbacks mark a sharp turn for the BNPL sector, which had Wall Street excited towards the tail end of 2024. Affirm shares soared 60% in November, the month Trump was elected. Jack Dorsey’s Block, which owns BNPL provider Afterpay, jumped 22% that month, but is down 9% this week.

James Friedman, an analyst at SIG, noted Affirm’s exposure to fashion, beauty, and travel, which are often hit hardest when consumers retreat. Roughly 42% of Affirm’s transactions are in general merchandise, with fashion and travel combining for another quarter of volume.

A spokesperson for Affirm declined to comment on Klarna’s delayed listing.

Regarding market volatility, the spokesperson said the adoption of products like Affirm, which offer more flexible options than credit cards, “is a secular and enduring trend across market cycles.”

“We underwrite every transaction before making a real-time credit decision and enable consumers to pay over time without any late or hidden fees,” Affirm said.

WATCH: Affirm CEO: We’re a replacement for credit cards, not debit cards

Affirm CEO: We're a replacement for credit cards, not debit cards

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Porsche Cayenne EV spotted in the US with a new look

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3 hours ago

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April 4, 2025

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Porsche Cayenne EV spotted in the US with a new look

Porsche-Cayenne-EV-Coupe-US

The electric SUV will finally be here later this year. With its highly anticipated debut just around the corner, the Porsche Cayenne EV was caught in a parking lot in the US with a sleek new design.

Porsche Cayenne EV coupe is testing in the US

After launching its second electric vehicle, the Macan EV, last year, Porsche will add its third later this year. Although the luxury automaker shifted plans with a new lineup of plug-in hybrid (PHEV) and gas-powered cars on the way, Porsche confirmed the fourth-gen Cayenne will still go fully electric.

Porsche introduced major upgrades on its largest SUV in 2024, but CEO Oliver Blume promises the EV version will “set standards in the segment as an electric SUV.”

After the first electric Cayenne prototypes left the Porsche factory last year, we got a sneak peek of the SUV as it hit the streets for testing.

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You can see that the electric SUV retains the signature Porsche design but with a few upgrades to help it stand out as an EV.

Porsche Cayenne EV Coupe testing in the US (Source: KindelAuto)

After a new Cayenne EV model was spotted testing in the US, it looks like we will have two versions to choose from. The new image from KindelAuto reveals what appears to be the coupe variant with a more crossover-like design.

The coupe has a streamlined profile with a much lower roofline, adding to its already sporty design. Although more details will be revealed closer to launch, we know it will be based on the PPE platform, which underpins the current Macan EV and Audi Q6 e-Tron.

Porsche said the platform will receive “comprehensive” upgrades for the upcoming electric SUV. The Macan EV has an EPA-estimated range of 308 miles. On the European WLTP scale, it’s rated at 613 km (381 miles).

The Porsche Cayenne EV will debut later this year as a 2026 model. Porsche is also working on a larger ultra-luxury electric SUV, codenamed “K1” internally, slated to launch in 2027.

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