A team at the US Department of Energy’s Oak Ridge National Laboratory has developed a utility-scale solar and storage project that can provide power to both AC and DC high-voltage lines, and thus shore up grid stability – here’s how it works.
Most of the US power grid uses alternating current, or AC, which constantly switches the direction of electron flow. But solar and battery storage uses direct current, or DC, that flows in a single direction.
The US power grid includes a smaller number of high-voltage DC lines that are more efficient at delivering bulk power over long distances or to remote regions.
Converting current between DC and AC requires specialized power electronics. So the researchers at Oak Ridge National Laboratory have developed a solar and storage plant that can provide power to both AC and DC high-voltage lines. As a result, renewable power can be more easily and reliably transmitted.
The project is called MARS, or “multi-port autonomous reconfigurable solar power plant.” It’s an all-in-one package that includes power electronics, electrical architecture, and cybersecurity software. And because it’s plug-and-play, it’s easier and cheaper for utilities to get it online.
Case simulations in hardware that were based on two California sites revealed that MARS achieved up to 50% reduction in power loss, a 16% improvement in stabilizing AC voltage frequency, and 100% detection of cyber intrusions.
MARS can also reconfigure itself based on available energy. For example, when the solar panels weren’t generating electricity at night, MARS could continue to connect the AC and DC transmission systems and use stored battery power to supplement its operation.
The researchers found that MARS reduced electrical costs by up to 40%, as they developed an algorithm to fine-tune plant size and energy storage to maximize annual revenue.
MARS also includes an innovative type of inverter that can maintain grid stability and jumpstart the grid after a disturbance.
Team lead Suman Debnath team explained:
You do not want the power grid to have significant losses of power when disturbances happen.
Traditional renewable plants may disconnect from the grid or stop sending power, but we did not see that happen with MARS. It could cope better with failures in the external grid and continue to operate, supporting the broader power system.
Oak Ridge National Laboratory is working with such industry partners as Southern California Edison, Opal-RT, Hitachi Energy, and the Georgia Institute of Technology. The Oak Ridge team and its partners are working together to roll out an initial field demonstration of either MARS components that support grid stability, or a scaled-down version of the full design.
Southern California Edison’s senior engineer for grid technology innovation, Md Arifujjaman, said:
From the point of view of a good algorithm to track down cybersecurity problems and technology we can use on the DC side, MARS is very helpful.
The DC technology is also promising for scaling down DC voltage for electric vehicle charging stations.
Photo: Existing and potential high-voltage direct current lines in states with the greatest solar potential, and prospective sites for MARS/Oak Ride National Laboratories
Read more: A Mars rover scientist is about to scale carbon-oxygen batteries
UnderstandSolar is a free service that links you to top-rated solar installers in your region for personalized solar estimates. Tesla now offers price matching, so it’s important to shop for the best quotes. Click here to learn more and get your quotes. — *ad.
FTC: We use income earning auto affiliate links. More.
Environment
U.S. crude oil falls below $60 a barrel to lowest since 2021 on tariff-fueled recession fears
A view shows disused oil pump jacks at the Airankol oil field operated by Caspiy Neft in the Atyrau Region, Kazakhstan April 2, 2025.
Pavel Mikheyev | Reuters
U.S. oil prices dropped below $60 a barrel on Sunday on fears President Donald Trump’s global tariffs would push the U.S., and maybe the world, into a recession.
Futures tied to U.S. West Texas intermediate crude fell more than 3% to $59.74 on Sunday night. The move comes after back-to-back 6% declines last week. WTI is now at the lowest since April 2021.
Worries are mounting that tariffs could lead to higher prices for businesses, which could lead to a slowdown in economic activity that would ultimately hurt demand for oil.
Oil futures, 5 years
The tariffs, which are set to take effect this week, “would likely push the U.S. and possibly global economy into recession this year,” according to JPMorgan. The firm on Thursday raised its odds of a recession this year to 60% following the tariff rollout, up from 40%.
Fueled by incentives from the Illinois EPA and the state’s largest utility company, new EV registrations nearly quadrupled the 12% first-quarter increase in EV registrations nationally – and there are no signs the state is slowing down.
Despite the dramatic slowdown of Tesla’s US deliveries, sales of electric vehicles overall have perked up in recent months, with Illinois’ EV adoption rate well above the Q1 uptick nationally. Crain’s Chicago Business reports that the number of new EVs registered across the state totaled 9,821 January through March, compared with “just” 6,535 EVs registered in the state during the same period in 2024.
Those numbers represent more than 50% growth in EV registrations – far beyond the expected 12% first-quarter increase nationally being projected by Cox Automotive. (!)
What’s going on in Illinois?
While President Trump and Elmo were running for re-election, they campaigned on the threat promise of canceling the $7,500 federal tax credit for EVs. Along with California Governor Gavin Newsom, Illinois’ Governor JB Pritzker made countermoves – launching a $4,000 rebate for new electric cars and up to $1,500 for the purchase of a new electric motorcycle.
At the same time, the state’s largest utility, ComEd, launched a $90 million EV incentive program featuring a new Point of Purchase initiative to deliver instant discounts to qualifying business and public sector customers who make the switch to electric vehicles. That program has driven a surge in Class 3-6 medium duty commercial EVs, which are eligible fro $20-30,000 in utility rebates on top of federal tax credits and other incentives (Class 1-2 EVs are eligible for up to $7,500).
We covered the launch of those incentives when the program was announced at Chicago Drives Electric last year, but the message here is simple: incentives work.
SOURCES: Chicago Business, Ray Cunningham; featured image by the author.
FTC: We use income earning auto affiliate links. More.
The electric construction equipment experts at XCMG just released a new, 25 ton electric crawler excavator ahead of bauma 2025 – and they have their eye on the global urban construction, mine operations, and logistical material handling markets.
Powered by a high-capacity 400 kWh lithium iron phosphate battery capable of delivering up to 8 hours of continuous operation, the XE215EV electric excavator promises uninterrupted operation at a lower cost of ownership and with even less downtime than its diesel counterparts.
XCMG is delivering on part of that reduced downtime promise with the lower maintenance and easier repair needs of electric equipment, and delivering on the rest of it with lickety-quick DC fast charging that can recharge the machine’s massive battery in 1.5-2 hours … but that’s not the slick bit. The XCMG XE125EV can be powered up without leaving the job site thanks to its BYD battery swap technology.
We first covered XCMG and its battery swap technology back in January, and covered similar battery-swap tech being developed by MOOG Construction offshoot ZQUIP, as well – but while XCMG’s battery tech has been in production for several years, it’s still not widely known about in the West (even within the industry).
XCMG showed off its latest electric equipment at the December 2024 bauma China, including an updated version of its of its 85-ton autonomous electric mining truck that features a fully cab-less design – meaning there isn’t even a place for an operator to sit, let alone operate. And that’s too bad, because what operator wouldn’t want to experience an electric truck putting down 1070 hp more than 16,000 lb-ft of torque!?
Easy in, easy out
The best part? All of the company’s heavy equipment assets – from excavators to terminal tractors to dump trucks and wheel loaders – all use the same 400 kWh BYD battery packs, Milwaukee tool style. That means an equipment fleet can utilize x number of vehicles with a fraction of the total battery capacity and material needs of other asset brands. That’s not just a smart use of limited materials, it’s a smarter use of energy.
You can check out all the XE215EV’s specs at this tear sheet, and get an in-person look at the Chinese company’s latest electric excavator this week in Munich, Germany.
SOURCE | IMAGES: XCMG.
FTC: We use income earning auto affiliate links. More.
-
Sports2 years ago‘Storybook stuff’: Inside the night Bryce Harper sent the Phillies to the World Series
-
Sports1 year agoStory injured on diving stop, exits Red Sox game
-
Sports1 year agoGame 1 of WS least-watched in recorded history
-
Sports2 years agoMLB Rank 2023: Ranking baseball’s top 100 players
-
Sports4 years ago
Team Europe easily wins 4th straight Laver Cup
-
Environment2 years agoJapan and South Korea have a lot at stake in a free and open South China Sea
-
Environment2 years agoGame-changing Lectric XPedition launched as affordable electric cargo bike
-
Business3 years agoBank of England’s extraordinary response to government policy is almost unthinkable | Ed Conway