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ESS is a manufacturer of iron flow batteries in the state of Oregon. At the present time, lithium-ion batteries account for about 85% of grid-scale energy storage. That technology is time-tested and reliable. Prices continue to fall, but lithium-ion batteries have some issues.

They use materials like lithium, cobalt, manganese, aluminum, and nickel that can be expensive, especially if they are in short supply. They can also catch fire and begin to degrade after thousands of charge/discharge cycles. But the biggest issue with lithium-ion batteries is they can only put stored electricity back into the grid for 2 to 4 hours.

Iron flow batteries use three of the most abundant elements on Earth — iron, salt, and water. They consist of two storage tanks with a membrane between them. The membrane allows electrons to flow back and forth between the tanks while keeping the liquids separate.

If that sounds easy, it’s not. Getting the right mix of iron, salt, and water is critical, and creating a membrane that lasts a long time is no easy thing. But ESS has products ready to go and has just signed a deal with SB Energy, a division of SoftBank, to provide 2 gigawatt-hours (GWh) of its iron flow batteries between now and 2026. The first of the batteries will be deployed at a solar power plant in Davis, California this month.

In a press release, Rich Hossfeld of SB Energy says, “ESS’s unique ability to manufacture and ship batteries using iron, salt, and water is a game-changer, enabling SB Energy to offer our customers safe, sustainable and low-cost energy storage today. Long duration storage is absolutely critical to providing flexible, affordable renewable energy at scale and aligns perfectly with the Biden administration’s ambitious clean energy initiatives. SB Energy is excited to continue its partnership with ESS and deploy the company’s domestically manufactured batteries into the vast and rapidly growing market for energy storage.”

Eric Dresselhuys, CEO of ESS CEO, agrees. “This agreement exemplifies the accelerating demand for long-duration energy storage and reinforces our strong partnership with SB Energy to supply safe and sustainable technology built in the US. The energy transition will require massive amounts of storage capacity in the coming years and we are focused on scaling up our manufacturing capacity to help meet that demand. We are fortunate to have such great partners as SB Energy and Breakthrough Energy Ventures and look forward to a long and expanding partnership.”

Dresselhuys adds, “This deal is really the culmination of years of work to show that there’s a better mousetrap out there that solves more problems and is better for where the grid is going. Once people see that we’ve been vetted and tested and approved by partners like SB, that provides a lot of confidence.”

Image credit: ESS Inc.

ESS claims its flow batteries last for more than 20,000 charge/discharge cycles and can provide energy for up to 12 hours. In addition, they have a life expectancy of 25 years and are easily recyclable when their useful life is over. The company says it uses the same electrolyte on both the negative and positive sides of the equation,which eliminates the cross-contamination and degradation that shortens the life of other flow batteries.

“Our patented electrode design and control system, coupled with our simple, yet elegant electrochemistry, allows you to operate longer, at higher efficiency and deeper discharge levels. Unlike typical batteries packaged as fixed cells or modules, a flow battery has significantly more energy storage capacity, which gives the user the flexibility to align both the power and amount of electricity stored precisely to a project’s requirements today and for the future.”

In addition to the deal with SB Energy, ESS has also been tapped by Enel to supply 17 of its shipping container-sized Energy Warehouse battery systems with a combined capacity of 8.5 megawatt-hours (MWh) to solar facilities in Spain.

Time-shifting is the operative concept when it comes to energy storage. Some people like to play to the grandstand and suggest smugly that the wind doesn’t always blow and the sun doesn’t always shine, and that’s why we need to keep thermal and nuclear generating plants functioning. But that blather misses the point.

As MIT noted in 2011,”The sunlight that reaches Earth every day dwarfs all the planet’s other energy sources. This solar energy is clearly sufficient in scale to meet all of mankind’s energy needs — if it can be harnessed and stored in a cost-effective way.” It says some 173,000 terawatts of solar energy strike the Earth every day — 10,000 times more energy than necessary to meet the energy needs of the entire human race. And it’s free, people! All we need to do is figure out how to harvest it, store it, and distribute it. That’s where time-shifting comes in. Generate it now, store, and use it later when the sun is over the horizon.

No one is suggesting the ESS iron flow batteries are the only solution to energy storage, but at a projected cost of around $25 per kilowatt-hour, they clearly should be part of the mix of available energy storage technologies.

 

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Five for Five: Kia PV5 scores 5 star European safety rating

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Five for Five: Kia PV5 scores 5 star European safety rating

For serious fleet buyers, safety isn’t a “nice-to-have,” it’s an absolute must – and Kia’s new PV5 electric van meets that need with a positively stellar, five-star safety rating on the tough European NCAP safety test.

The new “do-it-all” Kia PV5 showed strong performance across a number of key safety categories, including Occupant Protection, Safety Assist/Crash Avoidance, and Post-Crash Safety. The PV5’s robust suite of standard ADAS technologies that includes AEB, Lane Support System, and Speed Assistance System also helped the new electric work van to deliver top marks in the NCAP’s “real world” test scenarios.

The PV5 opens a new chapter in practical, electrified mobility, offering generous space and modular versatility for everyday use,” explains Sangdae Kim, Executive Vice President and Head of the (relatively) new PBV Business Division at Kia. “Achieving the top Euro NCAP five-star rating is clear validation of its safety performance and will serve as strong momentum as Kia expands its PBV lineup across Europe.”

The Euro NCAP tests highlighted the strong performance of a number of the PV5’s ADAS features, specifically calling out the following:

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  • Demonstrated strong responsiveness in vehicle-to-vehicle scenarios
  • Provides additional protection for pedestrians behind the vehicle
  • Avoided collisions in most pedestrian and cyclist test cases

The Kia PV5 slots into familiar territory for US buyers, landing roughly in the same size class as the Ford Transit Connect or Ram ProMaster City, with ~180 cubic feet of interior cargo space available, which is plenty to make it attractive for last-mile delivery and trade work in tight urban markets.

Globally, the PV5 is offered with a number of battery options, including a smaller 43.3 kWh Lithium-Iron-Phosphate (LFP) pack, as well as larger Nickel-Cobalt-Manganese (NCM) packs at 51.5 kWh and 71.2 kWh. The longest-range versions are good for about 250 miles of estimated range – more than enough for Kia to make a case for it as a practical, city-focused alternative to much larger (and pricier) electric vans.

Larger vans, by the way, that may not have that 5 star Euro NCAP rating.

Kia PV5


SOURCE | IMAGES: Kia; photo by Scooter Doll.


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Waymo pauses robotaxi service in San Francisco after blackout chaos — Musk says Tesla car service unaffected

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Waymo pauses robotaxi service in San Francisco after blackout chaos — Musk says Tesla car service unaffected

Alphabet-owned Waymo has suspended its driverless ride-hail service in the San Francisco Bay Area after blackouts plagued the city Saturday afternoon.

“We have temporarily suspended our ride-hailing services in the San Francisco Bay Area due to the widespread power outage,” a Waymo spokesperson tells CNBC. “Our teams are working diligently and in close coordination with city officials, and we are hopeful to bring our services back online soon. We appreciate your patience and will provide further updates as soon as they are available.”

Waymo notice of service outage in San Francisco.

Source: Waymo

As power outages spread yesterday, videos shared on social media appeared to show multiple Waymo vehicles stalled in traffic in different parts of the city.

San Francisco resident Matt Schoolfield said he saw at least three Waymo autonomous vehicles stopped in traffic Saturday around 9:45 p.m. local time, including one he photographed on Turk Boulevard near Parker Avenue.

“They were just stopping in the middle of the street,” Schoolfield said.

A Waymo vehicle stuck between Parker and Beaumont, on the north side of Turk Boulevard in San Francisco.

Credit: Matt Schoolfield

The power outages began around 1:09 p.m. Saturday and peaked roughly two hours later, affecting about 130,000 customers, according to Pacific Gas and Electric. As of Sunday morning, about 21,000 customers remained without power, mainly in the Presidio, the Richmond District, Golden Gate Park and parts of downtown San Francisco.

PG&E said the outage was caused by a fire at a substation that resulted in “significant and extensive” damage, and said it could not yet provide a precise timeline for full restoration.

San Francisco Mayor Daniel Lurie said in a 9 p.m. update on X that police officers, fire crews, parking control officers and city ambassadors were deployed across affected neighborhoods as transit service gradually resumed. “Waymo has also paused service,” Lurie said.

Amid the disruption, Tesla CEO Elon Musk posted on X: “Tesla Robotaxis were unaffected by the SF power outage.”

Unlike Waymo, Tesla does not operate a driverless robotaxi service in San Francisco.

Tesla’s local ride-hailing service uses vehicles equipped with “FSD (Supervised),” a premium driver assistance system. The service requires a human driver behind the wheel at all times.

According to state regulators — including the California Department of Motor Vehicles and California Public Utilities Commission — Tesla has not obtained permits to conduct driverless testing or services in the state without human safety supervisors behind the wheel, ready to steer or brake at any time.

Tesla is vying to become a robotaxi titan, but does not yet operate commercial, driverless services. Tesla’s Robotaxi app allows users to hail a ride; however, its vehicles currently have human safety supervisors or drivers on board, even in states where the company has obtained permits for driverless operations.

Waymo, which leads the nascent industry in the West, is Tesla’s chief competitor in AVs, along with Chinese players like Baidu-owned Apollo Go.

The outage-related disruptions in San Francisco come as robotaxi services are becoming more common in other major U.S. cities. Waymo is among a small number of companies operating fully driverless ride-hailing services for the public, even as unease about autonomous vehicles remains high.

A survey by the American Automobile Association earlier this year found that about two-thirds of U.S. drivers said they were fearful of autonomous vehicles.

The Waymo pause in San Francisco indicates cities are not yet ready for highly automated vehicles to inundate their streets, said Bryan Reimer, a research scientist at the MIT Center for Transportation and co-author of “How to Make AI Useful.”

“Something in the design and development of this technology was missed that clearly illustrates it was not the robust solution many would like to believe it is,” he said.

Reimer noted that power outages are entirely predictable. “Not for eternity, but in the foreseeable future, we will need to mix human and machine intelligence, and have human backup systems in place around highly automated systems, including robotaxis,” he said.

State and city regulators will need to consider what the maximum penetration of highly automated vehicles should be in their region, Reimer added, and AV developers should be held responsible for “chaos gridlock,” just as human drivers would be held responsible for how they drive during a blackout.

Waymo did not say when its service would resume and did not specify whether collisions involving its vehicles had occurred during the blackout.

Tesla and the National Highway Traffic Safety Administration did not immediately respond to requests for comment.

This is a developing story. Please check back for updates.

CNBC’s Riya Bhattacharjee contributed reporting.

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I just tested one of the lightest electric bikes ever: Dahon K-Feather review

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I just tested one of the lightest electric bikes ever: Dahon K-Feather review

The Dahon K-Feather is one of those electric bikes that makes a lot more sense the longer you ride it. On paper, it looks rather low-power and low-capacity compared to the spec sheets for most e-bikes. In practice, especially when used exactly as intended, it turns out to be a remarkably well-executed urban commuter that still feels refreshingly different years after its release.

Launched earlier this year by Dahon, a brand best known for decades of folding bike experience, the K-Feather was never meant to compete with high-power folding e-bikes loaded with throttles, suspension, and giant batteries.

Instead, it aims for something far simpler: a super lightweight folding bike that just happens to have electric assist.

A lightweight e-bike, even by light e-bike standards

At around 26 lb (11.8 kg), the K-Feather is shockingly light for an electric bike, even by today’s standards. Pick it up and it barely registers as an e-bike at all. That’s largely thanks to its extremely minimalist design, highlighted by the cleverly hidden battery integrated into the seatpost.

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The 24V 5Ah battery offers roughly 120 Wh of capacity, which is undeniably small, but it also avoids the bulky look and awkward weight distribution that many early e-bikes suffered from.

The result is a bike that feels balanced, easy to carry, and genuinely pleasant to live with in an urban environment. Folding it up is quick and intuitive, and carrying it up stairs or onto public transport doesn’t feel like a chore. For apartment dwellers, train commuters, or anyone combining cycling with other forms of transportation, this matters a lot.

I’m not sure how else to say this without beating a dead horse, but it is just incredibly lightweight. When you pick it up, your brain just sort of short-circuits as it fails to compute that this is still an electric bike.

Simple, subtle electric assist

Power comes from a 250W rear hub motor that provides pedal assist only. There’s no throttle, no complex display, and no attempt to turn the K-Feather into something it isn’t. The assist tops out around 15.5 mph (25 km/h), aligning more with European-style pedelec limits than US Class 2 or Class 3 expectations.

For those accustomed to American-style electric bikes, that may sound quite slow. And if you’re trying to keep up with traffic on the shoulder of a busy road, it is slow. But this e-bike is more designed for bike lane cruising, where 15 mph means you’re easily keeping up with, or passing, most pedal bike riders.

The assist itself is quiet and unobtrusive. It doesn’t leap forward when you start pedaling, and it doesn’t overpower the ride. Instead, it feels like a gentle push that smooths out stop-and-go city riding and takes the edge off short climbs and headwinds. You still feel like you’re riding a bike, just a slightly stronger version of yourself.

The torque sensor definitely does its job, coming on quickly and effectively without being lurchy, though it’s hard for a 250W motor to feel lurchy anyway. But with an effective torque sensor instead of a laggy pedal assist sensor, the minimal assist still feels nice and natural, as if you’re simply always pedaling with a tailwind.

That riding feel is a big part of the K-Feather’s charm. It doesn’t try to impress you with acceleration or brute force. It simply makes urban cycling easier, calmer, and more approachable. It’s not a powerhouse, but rather a sensible commuter.

Where the limitations show up

There’s no getting around the fact that the K-Feather’s small battery and modest motor define its limits. Range is typically quoted at around 15 to 20 miles (25 to 40 km), and that’s realistic if you’re riding on relatively flat terrain and contributing a reasonable amount of pedal effort. Start pushing hills hard or riding aggressively, and that number will drop.

There aren’t multiple pedal assist levels, so it’s not like you can drop it into lower pedal assist power to save battery. Instead, range largely comes down to your weight, your riding, speed, and how hilly your terrain proves to be.

Similarly, steep climbs will quickly reveal the bike’s low power output. This is not a hill crusher, and it’s not pretending to be one. The single-speed drivetrain reinforces that reality, keeping things simple and low maintenance but limiting flexibility when terrain gets demanding.

The V-brakes look old-school, sure. But I wouldn’t actually ding them here because they seem to work great. I had rim brakes for a long, long time. And while I enjoy the stopping power and low maintenance of hydraulic disc brakes, I can’t ignore the fact that when I yank on these stoppers, I quickly find myself stationary. So yeah, pooh-pooh them all you want for being older tech, but they work.

And lastly, I do wish the tail light and headlight were powered by the main e-bike battery. Instead, they have their own dedicated rechargeable batteries. It works, but it’s one more thing to remember to charge every now and again.

For riders coming from American-style, high-powered e-bikes, these constraints might feel significant. But context matters here, and that’s the thing to keep in mind for anyone considering an ultra-lightweight e-bike like this. The K-Feather isn’t trying to replace a car or handle long suburban commutes. It’s designed for short urban trips, last-mile riding, and compact living situations, and in that role, its limitations feel more like trade-offs than flaws.

In its element: city commuting

The key takeaway for me is that the K-Feather works best as a runabout in a dense city environment, which is where it makes perfect sense. Short trips between neighborhoods, errands, commuting a few miles to work, or riding to a train station are exactly what it excels at. Its light weight makes it easy to carry inside rather than locking up outside, and its discreet appearance doesn’t scream “expensive e-bike.”

In fact, at around US $1,299 depending on current pricing and sales, that’s a pretty darn good price for an ultra-lightweight e-bike. We’re used to seeing e-bikes in this price range fetch higher figures in the $3,000 to $4,000 range (and sometimes even much more) from exotic frame materials and obscure drivetrains. But the K-Feather just uses clever engineering that tracks with Dahon’s decades of design legacy to create something light yet stiff, and without breaking the bank.

The small wheels and compact geometry make it nimble in traffic, and the assist smooths out frequent starts and stops at intersections. You arrive less sweaty and less fatigued, but still feel like you actually rode a bike rather than being carried by a motor.

This is also a bike that appeals to riders who want electric help without fully committing to the idea of an e-bike. It’s unintimidating, visually understated, and mechanically simple. For many people, that’s a feature, not a drawback.

Final thoughts

The Dahon K-Feather isn’t for everyone, and it certainly isn’t trying to be. If you want high speed, long range, or hill-dominating power, this is not the bike for you. I’d recommend that you look elsewhere (and be prepared to lift several more kilos).

But if you want a genuinely lightweight folding e-bike that integrates electric assist in a subtle, elegant way, it still holds up remarkably well. And folds up remarkably well, too.

Used in its intended environment as a city-focused commuter and last-mile bike, the K-Feather works exactly as promised. It’s simple, refined, and quietly effective, and that’s a combination that remains surprisingly rare in the e-bike world.

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