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MIT scientists have designed a solar-powered desalination system that turns saltwater into drinkable water at a higher volume – and lower cost.

Researchers from MIT and Shanghai Jiao Tong University have published a paper, “Extreme salt-resisting multistage solar distillation with thermohaline convection,” in the journal Joule about a study that has the potential to make a big leap forward in reducing the cost of water production because it doesn’t require electricity to run.

The device they built creates circular currents of water known as eddies that look like small whirlpools that function similarly to the ocean’s much larger thermohaline circulation. This circulation, combined with the sun’s heat, drives water to evaporate, leaving salt behind.

Lenan Zhang, a research scientist in MIT’s Device Research Laboratory, explains:

When seawater is exposed to air, sunlight drives water to evaporate. Once water leaves the surface, salt remains. And the higher the salt concentration, the denser the liquid, and this heavier water wants to flow downward.

By mimicking this kilometer-wide phenomena in a small box, we can take advantage of this feature to reject salt.

How it works

Scientists used a small, thin box topped with a dark material that efficiently absorbs the sun’s heat. Inside, the box is separated into a top and bottom section. Water can flow through the top half, where the ceiling is lined with an evaporator layer that uses the sun’s heat to warm up and evaporate any water in direct contact. The water vapor is then funneled to the bottom half of the box, where a condensing layer air-cools the vapor into pure drinkable water.

The researchers set the entire box at a tilt within a larger empty vessel, then attached a tube from the top half of the box down through the bottom of the vessel, and floated the vessel in salt water. The water naturally pushes up through the tube and into the box, where the tilt of the box, combined with thermal energy from the sun, induces the water to swirl as it flows through. The small eddies help to bring water in contact with the upper evaporating layer while keeping salt circulating rather than settling and clogging.

Other passive solar desalination concepts are currently being tested by other teams, but the MIT researchers say their new system has higher water-production and salt-rejection rates.

They assert that if the system is scaled up to the size of a small suitcase, it could produce about 4 to 6 liters (1 to 1.5 gallons) of drinking water per hour and last several years before requiring replacement parts. At that scale and performance, the system could produce drinking water at a rate and price that’s cheaper than tap water.

A scaled-up device could passively produce enough drinking water to meet the daily requirements of a small family. It could also supply off-grid coastal communities near seawater.

What do you think of this solar-powered desalination system? Do you think this would, in theory, provide relief for folks in Louisiana whose drinking water is threatened by saltwater from the Gulf of Mexico that’s infiltrating the Mississippi River due to drought? Let us know in the comments below.

Read more: US solar is booming – here’s the newly released data

Photo: MIT


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Opinion: it’s time to start recommending some Tesla alternatives [update]

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Opinion: it's time to start recommending some Tesla alternatives [update]

For years, Tesla has been the go-to EV recommendation for “normals” looking for a painless, low-effort experience from their first electric cars. In light of questionable recalls and its CEO’s recent involvement in controversial politics, however, people are starting to distance themselves from the trailblazing company.

All that begs the question: what should we recommend to EV noobs now?

UPDATE: you guys had some great suggestions in the comments. I’ve included a few of them in the article, below. Enjoy!


Despite early quality issues and ongoing service headaches, the groundbreaking S3XY lineup of EVs have always had a secret weapon in the form of the Tesla Supercharger network.

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That network of dependable high-speed chargers, paired with solid app integration that makes it easy for Tesla drivers to find available chargers just about anywhere in the US, gave the brand a leg up – but no more. By opening up the Supercharger network to brands like Ford, Hyundai, Kia, and others, Tesla has given away its biggest competitive advantage.

Add in charging and route-planning apps like Chargeway, that make navigating the transition from CCS to NACS easier than ever with its intuitive colors and numbers and easy on/off switch for vehicles equipped with NACS adapters, and it feels like the time is right to start suggesting alternatives to the old EV industry stalwarts. As such, that’s exactly what I’m going to do.

Here, then, are my picks for the best Tesla S3XY (and Cybertruck) alternatives you can buy.

Less Model S, more Lucid Air


Lucid-$20K-EV
Lucid Air sedans; via Lucid.

Developed by OG Tesla Model S engineers with tunes from Annie Get Your Gun playing continuously in their heads, the Lucid Air promises to be the car Tesla should and could have built, if only Elon had listened to the engineers.

With panel fit, material finish, and overall build quality that’s at least as good as anything else in the automotive space, the Lucid Air is a compelling alternative to the Model S at every price level – and I, for one, would take a “too f@#king fast” Lucid Air Sapphire over an “as seen on TV” Model S Plaid any day of the week. And, with Supercharger access reportedly coming later this quarter, Air buyers will have every advantage the Supercharger Network can provide.

HONORABLE MENTIONS

Less Model 3, more Hyundai IONIQ 6


Hyundai-free-charger-EVs-IONIQ-6
2025 Hyundai IONIQ 6 Limited; via Hyundai.

Hyundai has been absolutely killing it these days, with EVs driving record sales and new models earning rave reviews from the automotive press. Even in that company the IONIQ 6 stands out, with up to 338 miles of EPA-rated range and lickety-quick 350 kW charging available to make road tripping easy – especially now that the aerodynamically efficient IONIQ 6 has Supercharger access through a NACS adapter (the 2026 “facelift” models get a NACS port as standard).

The company’s sole electric sedan hasn’t seen the same sales success as IONIQ 5, of course – but that has more to do with America’s insatiable lust for crossovers and SUVs than any shortcoming inherent in the IONIQ 6 itself. All the same, Hyundai is helping dealers clear out its remaining 2024 and ’25 models with 0% financing for up to 48 months through June 2nd.

HONORABLE MENTIONS

COMMENTER FAVORITES

Less Model X, more Volvo EX90


2025 Volvo EX90; via Volvo Cars.

Once upon a time, Mrs. Jo Borrás and I were shopping three-row SUVs and found ourselves genuinely drawn to the then-new Model X. Back then it was the only three-row EV on the market, but it wasn’t Elon’s antics or access to charging, or even the Model X’s premium pricing that squirreled the deal. It was the stupid doors.

We went with the similarly new Volvo XC90 T8 in denim blue, and followed up the big PHEV with a second, three years later, in Osmium Gray. When it’s time to replace this one, you can just about bet your house that the new 510 hp EX90 with 310 miles of all-electric range will be near the top of the shopping list.

HONORABLE MENTIONS

COMMENTER FAVORITES

Less Model Y, more Kia EV6


Kia-EV6-GT-lease
2024 Kia EV6 GT; via Kia.

If half the fun of driving a Model Y is terrifying your passengers with its straight-line speed, then the Kia EV6 has to be a serious contender for a replacement.

The sporty EV6 GT made its global debut by drag racing some of the fastest ICE-powered cars of the day, including a Lamborghini, Mercedes-AMG GT, a Porsche, even a turbocharged Ferrari – and it beat the pants off ’em. Combine supercar-baiting speed with an accessible price tag, NACS accessibility, $10,000 in customer cash on remaining 2024 models ($3,000 on 2025s) and just a hint of Lancia Stratos in the styling, the EV6 is tough to beat.

HONORABLE MENTIONS

COMMENTER FAVORITES

Less Cybertruck, more therapy

Image created by Chat GPT.

It’s not bulletproof, it’s not easy to upfit, it shouldn’t be used for towing, and it won’t win in a straight fight against a vinyl picket fence. By just about every standard “truck” metric, the Tesla Cybertruck falls short against the competition from Chevrolet, Ford, and Rivian. On a more subjective front, the Cybertruck has become a symbol for a conservative movement that is (depending on your point of view) either making America great again or plunging a once-great democracy into an era of fascist oligarchy and widespread stupidity.

In short, it’s probably best to skip the CT.

If you disagree with that statement and feel like driving a new Tesla Cybertruck is the key to happiness, I’m not sure an equally ostentatious GMC Hummer EV or more subtle Rivian R1T will help you scratch that particular itch – but maybe therapy might!

HONORABLE MENTIONS

COMMENTER FAVORITES

  • Not getting the USAF joke.
  • Projecting obsessions onto the author.
  • Feeling butthurt about the Pit Vipers and tribal tats.

Original content from Electrek.


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Tesla co-founder, Komatsu bring mobile Megawatt charging to electric job sites

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Tesla co-founder, Komatsu bring mobile Megawatt charging to electric job sites

There’s no question that electric construction equipment is safer, more precise, and generally better than the diesel equipment it’s replacing, but getting power to that equipment remains a logistical challenge that hasn’t been solved for. With this new mobile Megawatt charging station, however, Komatsu think they’ve found a solution — with up to 6 MW of power!

Developed by Tesla co-founder Ian Wright, Dimaag, and Japanese equipment giant Komatsu, the groundbreaking Mobile Megawatt Charging System (MWCS) promises to bring electricity where it’s needed, anywhere on the job site, then quickly dispense enough energy to get the electric machines under its care back up and running.

And, with Megawatt power delivery on tap, the new Komatsu-Dimaag MWCS can power up equipment assets between shift changes — if it even takes that long!

Komatsu Dimaag mobile charger


Meet Dimaag’s Mobile MegaWatt Charging System– A Power Bank On Wheels
Mobile Megawatt charger; via Dimaag.

The MWCS boasts a compact, high-efficiency DC-DC converter and a long-life, high-discharge-rate Battery Energy Storage System (BESS) on board that can be connected to a DC fast charger itself, or get “trickle charged” between shifts. Both the battery and its control systems make use of an advanced thermal management solution that Komatsu and Dimaag say optimizes both safety and battery life during high-power delivery.

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What’s more, that charging capability won’t stop at just one Megawatt. The system is designed to be scalable up to six (6) Megawatts — making it suitable to juice up even the biggest EVs and, frankly, strongly implying that they’ve already got a buyer.

To make sure the MWCS can get all that power where it needs to, wherever it needs to, the machine is equipped with with stout, construction-grade AT tires, 4-wheel drive, and 4-wheel steering to navigate tight surroundings and rough terrains that other solutions wouldn’t be able to get to. And, while it isn’t mentioned in the press release, there’s a common sense idea here that you could, in a pinch, use the MWCS to tow less capable vehicles out of the mud and snow, if needed.

For their part, it seems like the people at Dimaag are pretty happy with the results. “Dimaag is excited to collaborate with Komatsu, introducing our advanced ESS and DC-DC architecture to revolutionize electrification in construction,” stated Ian Wright, VP Engineering at Dimaag. “Off-road vehicle electrification demands practical solutions that not only meet but exceed the performance of equivalent large diesel engine vehicles, while also providing substantial Total Cost of Ownership (TCO) savings. Dimaag’s electrification and high-power megawatt charging systems are designed to achieve this.”

The prototype MWCS shown, above, features a 295 kWh battery pack and an MCS connector delivering up to 1,500 amps and 1,000 volts of power. Komatsu envisions a scenario wherein the mobile charger makes its rounds on the job site charging up equipment and heading back to grid power (if available) to charge itself.

The MWCS made its debut at the bauma construction show earlier this year. Real-world trials are expected to begin this year.

Electrek’s Take


Komatsu electric equipment at bauma; via Komatsu.

Conceptually similar to the mobile power platform being developed by American firm Dannar, this new mobile Megawatt charging unit has some heavy-hitting names behind it that make it impossible to ignore. Combine that with Komatsu’s ever-increasing push towards full electrification (the two machines shown, above, are all-new in the last 60 days, with more to come) and it really feels like the MWCS is going to be A Real Thing™️somewhat sooner than later.

Stay tuned.

SOURCES | IMAGES: Komatsu, Dimaag, via EIN Presswire.


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FTC: We use income earning auto affiliate links. More.

Continue Reading

Environment

Opinion: it’s time to start recommending some Tesla alternatives

Published

on

By

Opinion: it's time to start recommending some Tesla alternatives [update]

For years, Tesla has been the go-to EV recommendation for “normals” looking for a painless, low-effort experience from their first electric cars. In light of questionable recalls and its CEO’s recent involvement in controversial politics, however, people are starting to distance themselves from the trailblazing company.

All that begs the question: what should we recommend to EV noobs now?

Despite early quality issues and ongoing service headaches, the groundbreaking S3XY lineup of EVs have always had a secret weapon in the form of the Tesla Supercharger network.

That network of dependable high-speed chargers, paired with solid app integration that makes it easy for Tesla drivers to find available chargers just about anywhere in the US, gave the brand a leg up – but no more. By opening up the Supercharger network to brands like Ford, Hyundai, Kia, and others, Tesla has given away its biggest competitive advantage.

Advertisement – scroll for more content

Add in charging and route-planning apps like Chargeway, that make navigating the transition from CCS to NACS easier than ever with its intuitive colors and numbers and easy on/off switch for vehicles equipped with NACS adapters, and it feels like the time is right to start suggesting alternatives to the old EV industry stalwarts. As such, that’s exactly what I’m going to do.

Here, then, are my picks for the best Tesla S3XY (and Cybertruck) alternatives you can buy.

Less Model S, more Lucid Air


Lucid-$20K-EV
Lucid Air sedans; via Lucid.

Developed by OG Tesla Model S engineers with tunes from Annie Get Your Gun playing continuously in their heads, the Lucid Air promises to be the car Tesla should and could have built, if only Elon had listened to the engineers.

With panel fit, material finish, and overall build quality that’s at least as good as anything else in the automotive space, the Lucid Air is a compelling alternative to the Model S at every price level – and I, for one, would take a “too f@#king fast” Lucid Air Sapphire over an “as seen on TV” Model S Plaid any day of the week. And, with Supercharger access reportedly coming later this quarter, Air buyers will have every advantage the Supercharger Network can provide.

HONORABLE MENTIONS

Less Model 3, more Hyundai IONIQ 6


Hyundai-free-charger-EVs-IONIQ-6
2025 Hyundai IONIQ 6 Limited; via Hyundai.

Hyundai has been absolutely killing it these days, with EVs driving record sales and new models earning rave reviews from the automotive press. Even in that company the IONIQ 6 stands out, with up to 338 miles of EPA-rated range and lickety-quick 350 kW charging available to make road tripping easy – especially now that the aerodynamically efficient IONIQ 6 has Supercharger access through a NACS adapter (the 2026 “facelift” models get a NACS port as standard).

The company’s sole electric sedan hasn’t seen the same sales success as IONIQ 5, of course – but that has more to do with America’s insatiable lust for crossovers and SUVs than any shortcoming inherent in the IONIQ 6 itself. All the same, Hyundai is helping dealers clear out its remaining 2024 and ’25 models with 0% financing for up to 48 months through June 2nd.

HONORABLE MENTIONS

Less Model X, more Volvo EX90


2025 Volvo EX90; via Volvo Cars.

Once upon a time, Mrs. Jo Borrás and I were shopping three-row SUVs and found ourselves genuinely drawn to the then-new Model X. Back then it was the only three-row EV on the market, but it wasn’t Elon’s antics or access to charging, or even the Model X’s premium pricing that squirreled the deal. It was the stupid doors.

We went with the similarly new Volvo XC90 T8 in denim blue, and followed up the big PHEV with a second, three years later, in Osmium Gray. When it’s time to replace this one, you can just about bet your house that the new 510 hp EX90 with 310 miles of all-electric range will be near the top of the shopping list.

HONORABLE MENTIONS

Less Model Y, more Kia EV6


Kia-EV6-GT-lease
2024 Kia EV6 GT; via Kia.

If half the fun of driving a Model Y is terrifying your passengers with its straight-line speed, then the Kia EV6 has to be a serious contender for a replacement.

The sporty EV6 GT made its global debut by drag racing some of the fastest ICE-powered cars of the day, including a Lamborghini, Mercedes-AMG GT, a Porsche, even a turbocharged Ferrari – and it beat the pants off ’em. Combine supercar-baiting speed with an accessible price tag, NACS accessibility, $10,000 in customer cash on remaining 2024 models ($3,000 on 2025s) and just a hint of Lancia Stratos in the styling, the EV6 is tough to beat.

HONORABLE MENTIONS

Less Cybertruck, more therapy

Image created by Chat GPT.

It’s not bulletproof, it’s not easy to upfit, it shouldn’t be used for towing, and it won’t win in a straight fight against a vinyl picket fence. By just about every standard “truck” metric, the Tesla Cybertruck falls short against the competition from Chevrolet, Ford, and Rivian. On a more subjective front, the Cybertruck has become a symbol for a conservative movement that is (depending on your point of view) either making America great again or plunging a once-great democracy into an era of fascist oligarchy and widespread stupidity.

In short, it’s probably best to skip the CT.

If you disagree with that statement and feel like driving a new Tesla Cybertruck is the key to happiness, I’m not sure an equally ostentatious GMC Hummer EV or more subtle Rivian R1T will help you scratch that particular itch – but maybe therapy might!

HONORABLE MENTIONS

Original content from Electrek.


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. The best part? No one will call you until after you’ve elected to move forward. Get started, hassle-free, by clicking here.

FTC: We use income earning auto affiliate links. More.

Continue Reading

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