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As a bullet train speeds by in the background, a liquid hydrogen tank towers over solar panels and hydrogen fuel cells at Panasonic’s Kusatsu plant in Japan. Combined with a Tesla Megapack storage battery, the hydrogen and solar can deliver enough electricity to power the site’s Ene-Farm fuel cell factory.

Tim Hornyak

As bullet trains whiz by at 285 kilometers per hour, Panasonic’s Norihiko Kawamura looks over Japan’s tallest hydrogen storage tank. The 14-meter structure looms over the Tokaido Shinkansen Line tracks outside the ancient capital of Kyoto, as well as a large array of solar panels, hydrogen fuel cells and Tesla Megapack storage batteries. The power sources can generate enough juice to run part of the manufacturing site using renewable energy only.

“This may be the biggest hydrogen consumption site in Japan,” says Kawamura, a manager at the appliance maker’s Smart Energy System Business Division. “We estimate using 120 tons of hydrogen a year. As Japan produces and imports more and more hydrogen in the future, this will be a very suitable kind of plant.”

Sandwiched between a high-speed railway and highway, Panasonic’s factory in Kusastsu, Shiga Prefecture, is a sprawling 52 hectare site. It was originally built in 1969 to manufacture goods including refrigerators, one of the “three treasures” of household appliances, along with TVs and washing machines, that Japanese coveted as the country rebuilt after the devastation of World War II.

Today, one corner of the plant is the H2 Kibou Field, a demonstration sustainable power facility that started operations in April. It consists of a 78,000-liter hydrogen fuel tank, a 495 kilowatt hydrogen fuel cell array made up of 99 5kW fuel cells, 570kW from 1,820 photovoltaic solar panels arranged in an inverted “V” shape to catch the most sunlight, and 1.1 megawatts of lithium-ion battery storage.

On one side of the H2 Kibou Field, a large display indicates the amount of power being produced in real time from fuel cells and solar panels: 259kW. About 80% of the power generated comes from fuel cells, with solar accounting for the rest. Panasonic says the facility produces enough power to meet the needs of the site’s fuel cell factory — it has peak power of about 680kW and annual usage of some 2.7 gigawatts. Panasonic thinks it can be a template for the next generation of new, sustainable manufacturing. 

“This is the first manufacturing site of its kind using 100% renewable energy,” says Hiroshi Kinoshita of Panasonic’s Smart Energy System Business Division. “We want to expand this solution towards the creation of a decarbonized society.”

The 495kilowatt hydrogen fuel cell array is made up of 99 5KW fuel cells. Panasonic says it’s the world’s first site of its kind to use hydrogen fuel cells toward creating a manufacturing plant running on 100% renewable energy.

Tim Hornyak

An artificial intelligence-equipped Energy Management System (EMS) automatically controls on-site power generation, switching between solar and hydrogen, to minimize the amount of electricity purchased from the local grid operator. For example, if it’s a sunny summer day and the fuel cell factory needs 600kW, the EMS might prioritize the solar panels, deciding on a mixture of 300kW solar, 200 kW hydrogen fuel cells, and 100kW storage batteries. On a cloudy day, however, it might minimize the solar component, and boost the hydrogen and storage batteries, which are recharged at night by the fuel cells.

“The most important thing to make manufacturing greener is an integrated energy system including renewable energy such as solar and wind, hydrogen, batteries and so on,” says Takamichi Ochi, a senior manager for climate change and energy at Deloitte Tohmatsu Consulting. “To do that, the Panasonic example is close to an ideal energy system.”

With grey hydrogen, not totally green yet

The H2 Kibou Field is not totally green. It depends on so-called grey hydrogen, which is generated from natural gas in a process that can release a lot of carbon dioxide. Tankers haul 20,000 liters of hydrogen, chilled in liquid form to minus 250 Celsius, from Osaka to Kusatsu, a distance of some 80 km, about once a week. Japan has relied on countries like Australia, which has greater supplies of renewable energy, for hydrogen production. But local supplier Iwatani Corporation, which partnered with Chevron earlier this year to build 30 hydrogen fueling sites in California by 2026, has opened a technology center near Osaka that is focused on producing green hydrogen, which is created without the use of fossil fuels.

Another issue that is slowing adoption is cost. Even though electricity is relatively expensive in Japan, it currently costs much more to power a plant with hydrogen than using power from the grid, but the company expects Japanese government and industry efforts to improve supply and distribution will make the element significantly cheaper.

“Our hope is that hydrogen cost will go down, so we can achieve something like 20 yen per cubic meter of hydrogen, and then we will be able to achieve cost parity with the electrical grid,” Kawamura said. 

Hydrogen market to grow 200-fold in next decade, predicts Goldman Sachs

Panasonic is also anticipating that Japan’s push to become carbon-neutral by 2050 will boost demand for new energy products. Its fuel cell factory at Kusatsu has churned out over 200,000 Ene-Farm natural gas fuel cell for home use. Commercialized in 2009, the cells extract hydrogen from natural gas, generate power by reacting it with oxygen, heat and store hot water, and deliver up to 500 watts of emergency power for eight days in a disaster. Last year, it began selling a pure hydrogen version targeted at commercial users. It wants to sell the fuel cells in the U.S. and Europe because governments there have more aggressive hydrogen cost-cutting measures than Japan. In 2021, the U.S. Department of Energy launched a so-called Hydrogen Shot program that aims to slash the cost of clean hydrogen by 80% to $1 per 1 kilogram over 10 years. 

Panasonic doesn’t plan to increase the scale of its H2 Kibou Field for the time being, wanting to see other companies and factories adopt similar energy systems.

It won’t necessarily make economic sense today, Kawamura says, “but we want to start something like this so it will be ready when the cost of hydrogen falls. Our message is: if we want to have 100% renewable energy in 2030, then we must start with something like this now, not in 2030.”

Japan's nuclear energy reversal 'is very good and encouraging news,' IEA director says

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Navee ST3 Pro e-scooter with quad suspension at new $850 low, ECOVACS A2500 RTK robot mower $1,500 low, Lectric, more

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May 27, 2025

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Navee ST3 Pro e-scooter with quad suspension at new 0 low, ECOVACS A2500 RTK robot mower ,500 low, Lectric, more

Just because Memorial Day is over, doesn’t mean the savings are slowing down on eco-friendly tech, and today’s Green Deals feature a mix of new and ongoing discounts at some of the best prices of the season. Headlining today is Navee’s newly launched Father’s Day Sale with up to $264 in savings on its two latest e-scooter series, which includes the new flagship ST3 Pro Electric Scooter with a damping arm suspension system, Apple Find My, and plenty more down at an $850 low, along with some free gear too. Next, we have ECOVACS’ new Goat A2500 RTK Robot Lawn Mower returning to its $1,500 low for the second time, as well as Lectric’s XP Lite 2.0 Long-Range e-bikes with $404 free bundled gear starting from $999. Lastly, we spotted EcoFlow’s DELTA 2 Smart Extra Battery dropping back to its $429 low. Plus, there’s all the rest of the hangover Green Deals and ongoing Memorial Day EV sales in the links at the bottom of the page, like yesterday’s ongoing increased savings on the Ride1Up Portola e-bike, and more – and don’t forget to browse our Memorial Day EV hub for the hangover savings while they last.

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.

Navee drops new flagship ST3 Pro electric scooter with damping arm suspension and Apple Find My to $850 + free gear

With Memorial Day having passed, Navee is jumping right into its Father’s Day Savings event with up to $264 in discounts across four of its newest e-scooters. The sale is headlined by Navee’s flagship ST3 Pro Electric Scooter that comes with $64 in free gear at $849.99 shipped. This entire package would normally cost you $1,014 in full these days ($950 for just the scooter), which has come down from its original $1,299 price tag from when it was unveiled at CES 2025 through its launch at the end of March. The biggest discount we saw in the time since was the early-bird launch discount to $899, which is getting beaten out here by today’s deal. All-in-all, despite the savings here only totaling up to $164, you’re still getting a high-performance commuting solution at the lowest price we have tracked. Head below for more.

Navee’s flagship ST3 Pro electric scooter is a commuter with serious get-up-and-go power, coming equipped with a 600W motor (1,350 peak) and a 12.75Ah battery that can carry you up to 46.6 miles on a single charge and reach 25 MPH top speeds – plus, that peak power is ready to conquer up to 28% inclines. A standout feature here is the brand’s new automotive-grade damping arm suspension system that will smooth out your travels at the front and rear, thanks to the four polymer arms. And security gets a step up from other scooters with the addition of Apple Find My too.

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There’s plenty more to be impressed by on Navee’s ST3 Pro electric scooter, like the triple-braking system made up of hydraulic disc, drum, and automotive-grade eABS brakes, the latter of which also boasts regenerative braking capabilities to recycle energy for prolonged journeys. There are also self-healing tires, an auto-on headlight, integrated turn signals and a taillight with brake lighting, lighting under the footboards with 15 different modes, a traction control system, a 3.6-inch LED display, its folding frame, and some additional remote smart controls via its companion app, like manual and auto locking, among others. Among the free gear, you’ll get an e-scooter lock and a phone holder for added convenience and peace of mind.

Navee’s other Father’s Day e-scooter deals:

  • GT3 Electric Scooter: $500 (Reg. $614)
    • 20 MPH for up to 31 miles
    • Apple Find My, smart locking, quad shock absorption, dual braking, and more.
    • comes with lock and phone holder
  • GT3 Pro Electric Scooter: $550 (Reg. $714)
    • 20 MPH for up to 37.3 miles
    • Apple Find My, smart locking, quad shock absorption, dual braking, and more.
    • comes with lock and phone holder
  • ST3 Electric Scooter: $750 (Reg. $914)
    • 25 MPH for up to 37.3 miles
    • Apple Find My, smart locking, damping arm suspension, triple braking, and more.
    • comes with lock and phone holder

There’s plenty of ongoing post-holiday price cuts across several e-bike and e-scooter brands right now, which you can browse in full in our Memorial Day EV hub here.

ECOVACS Goat A2500 RTK robot lawn mower

ECOVACS’ new Goat A2500 RTK robot mower returns for the second time to $1,500 low

Amazon is offering a second chance at the lowest price on the new ECOVACS Goat A2500 RTK Robot Lawn Mower for $1,499.99 shipped, as well as discounts on two of its counterparts. This new and advanced autonomous lawn care solution has been going for $2,000 at full price since hitting the market a few months ago, with three discounts having taken things down to $1,700 and $1,800, and one previous drop to this same low back at the top of the month. You’re getting a second chance here today at a 25% markdown that cuts $500 off the tag for the lowest price we have tracked.

One of ECOVACS’ new robot mowers, the Goat A2500 sits as the middle-ground choice with a 32V motor and dual-blade discs that cover mowing duties across 4,305 square feet of land in an hour, working at 2.3 feet per second. The 5Ah battery allows enough juice to tackle up to 5,382 square feet on a single charge, with it automatically returning to its station upon low levels and only taking 45 minutes before it’s ready to go once again.

What’s really great here is the trading of any need for perimeter wires to operate via RTK navigation, which works along with the 3D-ToF LiDAR tech and AIVI 3D AI camera to not only stay the course, but also avoid 200+ common garden obstacles – all with an IPX6 waterproof construction for when it gets caught by sudden weather changes. There’s also an array of remote smart controls through its app, which allows you to adjust performance settings, as well as edit the 3D maps that it uses to complete its duties.

ECOVACS’ other Goat robot mower deals:

lectric xp lite 2.0 e-bike

Lectric’s 49-pound XP Lite 2.0 folding e-bikes with 80-mile range get $404 in free gear starting from $999

While Memorial Day may be over, the savings we’re seeing from Lectric are continuing for an unknown amount of time, with up to $742 in free gear accompanying e-bike purchases – and don’t forget the ongoing preorder bundle deals for the brand’s new XP4 and XP4 750 e-bikes that start from $999. One of the notable increases in savings during this sale is on the Lectric XP Lite 2.0 Long-Range e-bikes for $999 shipped and come with $404 in free gear, as well as the XP Lite 2.0 JW Long-Range model that sits a little higher at $1,099 shipped, coming with the same bundle. These packages would normally run you $1,403 and $1,503 at full price, which is beating out most of the bundle sizes we’ve seen since this same package was offered at the beginning of January. The extra add-ons include a rear cargo rack, fenders, a suspension seat post, an accordion-style folding bike lock, two adjustable rear-view mirrors, and an Elite headlight upgrade.

Coming in as the lightest e-bikes under Lectric’s flag, the XP Lite 2.0 e-bikes weigh in at just 49 pounds, making them more manageable up and down stairs or when putting them in your car for longer-distance transport – plus, the foldable design also contributes to saving space when you’re not riding. The 672Wh battery in each delivers up to 80 miles of travel on a single charge when its five PAS levels are being used, while the 300W rear hub motor (819Wh peak) reaches up to 20 MPH speeds.

As is the case with Lectric’s lineup, you’re getting dependable features that you’d expect to raise the price more, like the hydraulic mineral oil brakes, 20×2.5-inch slick tires with 3mm Hippo Skin liner and pre-slimed tubes for anti-puncture resistance, BMX-style folding handlebars, and a full color LCD screen with a USB-A port to juice up devices as you ride, perfect for those using their phones for GPS.

And for just $100 more you can upgrade to the JW Black variant, which has been given a Gates Carbon Drive belt system for a quieter, smoother, and oil-free riding experience, with it also promising a longer-lasting lifespan over chain-drive models. You can also save a bit more going with the shorter 45-mile range standard models that start from $799 shipped, though there are no bundle packages with free gear on these.

Be sure to check out the full lineup of Lectric’s ongoing Memorial Day Sale here while the massive savings last, with even more ongoing sales past the holiday collected in our Memorial Day EV hub, with many slated to end over the next few days, while others are continuing into June.

EcoFlow DELTA 2 smart extra battery

Add 1,024Wh to your DELTA 2 LiFePO4 power station capacity with this expansion battery at $429 low

Coming at us through its official Amazon storefront, EcoFlow is undercutting its ongoing Memorial Day Sale pricing (ending May 28) on the DELTA 2 Smart Extra Battery for $428.99 shipped. This add-on unit normally fetches $799 at full price directly from the brand, but has been starting from $599 in 2025 at Amazon. Discounts have mostly kept costs above $449, though we did see two previous dips to this low. It’s beating out EcoFlow’s direct sale pricing by $30, giving you $170 in savings off its going Amazon rate ($370 off its MSRP) at the lowest price we have tracked.

This add-on battery from EcoFlow is the perfect addition for folks with an existing DELTA 2 power station who want to get far more backup power support for traveling and at-home needs. The battery sports a 1,024Wh LiFePO4 capacity that can be added to your existing station, giving you 2,048Wh with one or bumping things as high as 3,072Wh when adding two to your setup. Right alongside the station, this battery comes rated for 3,000+ life cycles, giving you over eight years of use if you were planning to discharge and recharge it every single day.

If you were considering starting your backup setup, you can check out EcoFlow’s ongoing Memorial Day deals running through May 28 – which include extra savings (code EF25MEM) that drops the power station and extra battery bundle to $997 from $1,798 – which beats Amazon by $2.

Best Spring 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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CATL’s first 100-second swappable EV batteries debut, proving how far ahead China is

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57 mins ago

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May 27, 2025

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CATL's first 100-second swappable EV batteries debut, proving how far ahead China is

CATL's-swappable-EV-batteries

The first vehicles with CATL’s new ultra-fast swappable EV batteries are now being delivered in China. CATL’s new “Choco-SEB” battery pack can be swapped in 100 seconds, making it just as quick as filling up at a gas station. The new EV features ultra-fast charging and starts at under $24,000 as China widens its lead on the global auto industry.

First EV with CATL’s swappable batteries debuts

CATL’s new swappable batteries could make gas stations obsolete. After revealing the “Choco-SEB” batteries last year, the first vehicles powered by the new technology are now being delivered in China.

On May 25, Changan Automobile announced that it had delivered 1,000 Oshan 520 models, the first electric vehicle (EV) based on CATL’s Choco-SEB swappable batteries. During the event, Changan said the new vehicle has already secured over 15,000 orders from clients.

The Oshan 520 starts at 166,800 yuan in China ($23,100) with a CLTC driving range of up to 515 km (320 miles). It can also gain a full recharge in 100 seconds thanks to CATL’s new tech.

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According to CATL, it has already established 34 Choco-SEB swap stations in Chongqing, Changan’s hometown. By the end of the year, it will have over 50 stations completed in the city.

CATL's-swappable-EV-batteries
CATL's-swappable-EV-batteries

In total, it aims to have 1,000 battery swap stations in 31 cities across China by the end of 2025. Changan and CATL signed an agreement in November 2024 to launch the first models based on the new tech.

After the meeting, officials watched the battery replacement process. Within 100 seconds, the vehicle gains over 310 miles of range (500 km).

CATL-EV-battery-swap-station
CATL Choco-Swap EV battery swap station (Source: CATL)

Several other major automakers, including GAC, Chery, NIO, FAW, and BAIC, are also partnering with CATL to launch vehicles based on its Choco-SEB.

CATL wants to make charging an EV as easy (or even easier) than filling up a gas vehicle. The battery giant released two “grades” last year, one for smaller cars and the other designed for larger A or B-class vehicles.

According to the latest data from SNE Research, CATL maintains a commanding lead in the global EV battery market, holding a 28.8% share through the first two months of 2025, up from 26.9% in the same period last year.

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There’s a hidden number on every e-bike. You should find yours right away

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1 hour ago

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May 27, 2025

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There’s a number hidden somewhere on basically every electric bicycle – or pedal bicycle – including the one in your garage. If you haven’t found it yet, you should do it today. Here’s why.

That number is the frame number, and for all intents and purposes, it’s basically like a VIN but for a bike. The VIN (Vehicle Identification Number) on your car is the number that gives it an identity and helps track it down if it’s ever stolen.

The same goes for your bike’s frame number. This innocuous string of characters, often stamped inconspicuously beneath your bike’s bottom bracket or on the head tube, isn’t just there to fill space – it can be the key to protecting your bike from theft or recovering it if the unthinkable happens.

Why is the frame number so important? Simply put, it’s your bike’s fingerprint, a unique identifier that distinguishes your ride from every other two-wheeler out there. In a scenario where your e-bike goes missing, having this number documented can drastically improve the odds of it being returned by law enforcement.

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Rad Power Bikes recently shared some great tips on the importance of knowing your frame number and where to find it. As you can see in the images below, the number is usually stamped into the frame on the bottom of the head tube (the front of the bike), or under the bottom bracket (the underside of the bike where the pedals are connected).

But knowing your frame number is only half the battle. The next critical step is registering that number with a bike registry. Fortunately, several trustworthy services offer free registration, creating a central database accessible by law enforcement, bike shops, and fellow cyclists who might stumble upon your stolen steed.

Bike Index (bikeindex.org) is one of the most popular platforms, boasting thousands of successful recoveries and a simple, intuitive registration process. And the best part is that it’s free! Another solid option is Project 529 (project529.com), widely used in North America and highly praised by police departments for its effectiveness in tracking stolen bikes. Again, it’s free to use!

Additionally, some local municipalities offer their own registries, such as the National Bike Registry (nationalbikeregistry.com), which collaborates directly with law enforcement to streamline the reporting and recovery process.

These types of services offer a form of passive protection, where you can mark your bike as stolen in their registries and then hope that someone finds it. In the event that someone does find your bike (such as in a shady Craigslist sale, etc.) and decides to check the frame number against the databases, they’ll see it’s stolen. If the police raid a bike theft ring and find a cache of stolen bikes, they may run all their frame numbers and find that yours is in the mix.

If you want protection that is a bit more active, there are full-on insurance options (though your renters or homeowner’s insurance may cover your e-bike), or theft protection services like Tempo that aren’t technically insurance, but operate somewhat similarly by offering a combination of holographic tracking number stickers for the bike combined with up to $2,500 in coverage for a replacement bike, if they can’t recover your stolen bike. I had the chance to sit down with Tempo’s founder Michael Keating at Micromobility America late last year, and you can see more about what I learned from him here.

This is probably a good time for a reminder to us all that a good lock is usually the only thing standing between our precious e-bike and those who want to take it from us.

I’ve reviewed a ton of locks, but some of my favorites include the Foldylock Compact for its high security, smaller size, and ease of locking to various sizes/shapes of bike racks, or the Foldylock Forever which is the big brother of the Compact and is nearly as impenetrable as it gets for a bike lock, as confirmed by the top bike lock testing agencies in the world.

For those who prefer a U-lock instead of a folding lock, my go-to lock is the Mason 220. Again, it is one of the top-rated locks, but it’s also wide enough to fit around the battery-fattened downtube of my e-bikes. That’s rare in the world of U-locks, and so the fact that it carries so many high-level awards and certifications is icing on the cake.

But no matter how good your lock is, there’s always a chance that your e-bike can be separated from you. And so the long and the short of it is that every e-bike has a unique identifier on it, and finding that frame number is your best chance of getting your bike back if it is ever stolen.

So take a minute today and locate your frame number to write it down or take a picture of it. Better yet, take a selfie with it and yourself. If you ever need to quickly prove that it’s your bike to a police officer on the sidewalk (such as if you followed an AirTag right to the bike), that’s a great way to do it.

I’ve had my e-bike stolen more than once, and the only way to curb that sinking feeling is to get it back. Taking a few minutes now to locate your frame number and register your e-bike can save you countless headaches later. After all, an ounce of prevention is worth several thousand dollars worth of cure when it comes to stolen bikes. So flip that bike upside down, jot down your frame number, and give yourself some peace of mind.

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