Several accounts on Chinese social media app Xiaohongshu (RedNote) have revealed images of the next generation of BYD “Flash Chargers” (aka “megawatt chargers”). According to the label on the plastic wrap surrounding the charge gun, the 1000V DC chargers offer up to 1200 kW of charging power, presumably for each ... [continued]
Several accounts on Chinese social media app Xiaohongshu (RedNote) have revealed images of the next generation of BYD “Flash Chargers” (aka “megawatt chargers”). According to the label on the plastic wrap surrounding the charge gun, the 1000V DC chargers offer up to 1200 kW of charging power, presumably for each ... [continued]
State celebrates opening of first overhead gantry charging infrastructure, which is approximately 25 per cent more space-efficient than conventional charging infrastructure,
Recently, there has been some encouraging EV charger news for passenger vehicles, with new chargers announced for retail outlets owned by Kroger and Walmart in a variety of states. Sheetz and WaWa also have an impressive number of EV chargers operating at some of their stores. Pilot is recognized as ... [continued]
If you’ve been reading CleanTechnica for a while, you probably remember the Charge to the Parks Project (we’re also on Bluesky and on Facebook), where I aimed to visit all of the national parks possible on all-electric power. Along the way, I tried crazy things, like pulling a trailer full ... [continued]
Recently, there has been some encouraging EV charger news for passenger vehicles, with new chargers announced for retail outlets owned by Kroger and Walmart in a variety of states. Sheetz and WaWa also have an impressive number of EV chargers operating at some of their stores. Pilot is recognized as ... [continued]
If you’ve been reading CleanTechnica for a while, you probably remember the Charge to the Parks Project (we’re also on Bluesky and on Facebook), where I aimed to visit all of the national parks possible on all-electric power. Along the way, I tried crazy things, like pulling a trailer full ... [continued]
In Short : Indian researchers have developed a self-charging solar energy storage device that integrates energy harvesting and storage into one unit. Designed as a photo-supercapacitor, the system captures sunlight and stores power simultaneously, eliminating the need for separate solar panels and batteries. The technology promises efficient, low-cost solutions for portable and off-grid energy needs.
In Detail : An innovative sunlight-powered supercapacitor called photo-capacitor developed by scientists can both capture and store solar energy in a single integrated device.
This could be a remarkable step towards clean and self-sustaining energy storage systems paving the way for efficient, low cost, and eco-friendly power solutions for portable, wearable, and off grid technologies.
Traditionally, solar energy systems rely on two separate units: solar panels for energy capture and batteries or supercapacitors for energy storage. While such hybrid systems are widely implemented from large-scale solar farms to portable electronics, they rely on additional power management electronics to regulate voltage and current mismatches between the energy harvester and the storage unit. This requirement increases system complexity, cost, energy losses, and device footprint, which becomes particularly detrimental for miniaturised and autonomous devices.
This new photo-rechargeable supercapacitor, developed by the Centre for Nano and Soft Matter Sciences (CeNS), Bengaluru, an autonomous institute under the Department of Science and Technology (DST), Government of India. seamlessly combined both processes converting sunlight into electrical energy and storing that energy for later, thus simplifying design and minimising energy loss during conversion and storage.
Under the guidance of Dr. Kavita Pandey, innovated with the help of binder-free use of nickel-cobalt oxide (NiCo2O4) nanowires, which have been uniformly grown on nickel foam using a simple in situ hydrothermal process.
These nanowires, only a few nanometres in diameter and several micrometres long, form a highly porous and conductive 3D network that efficiently absorbs sunlight and stores electrical charge. This unique architecture allowed the material to act simultaneously as a solar energy harvester and a supercapacitor electrode.
When tested, the NiCo2O4 electrode exhibited a remarkable 54% increase in capacitance under illumination, rising from 570 to 880 mF cm-2 at a current density of 15 mA cm-2. This exceptional performance stems from the efficient generation and transfer of light-induced charge carriers within the nanowire network. Even after 10,000 charge-discharge cycles, the electrode retained 85% of its original capacity, demonstrating its long-term stability, an essential feature for practical applications.
To evaluate its real-world applicability, the researchers prepared an asymmetric photo-supercapacitor using activated carbon as the negative electrode and NiCo2O4 nanowires as the positive electrode. The device delivered a stable output voltage of 1.2 volts, maintained 88% of its capacitance retention even after 1,000 photo-charging cycles, and operated efficiently under varying sunlight conditions-from low indoor illumination to intense 2 sun intensity. This stability indicates that the nanowire structure can endure both mechanical and electrochemical stress over extended periods of use.
By integrating sunlight harvesting and energy storage in a single device, the team developed self-charging power systems that can function anywhere even in remote regions without access to an electrical grid.
Such technology can substantially reduce dependence on fossil fuels and conventional batteries, paving the way for a sustainable and green energy future. In addition to the experimental, theoretical study was carried out to understand why the NiCo2O4 nanowire system performs so efficiently.
This study revealed that nickel substitution in the cobalt oxide framework narrows the band gap to approximately 1.67 eV and induces half metallic behavior. This means the material behaves as a semiconductor for one type of electron spin while remaining metallic for the other: a rare dual property that enables faster charge transport and higher electrical conductivity. Such spin dependent conductivity is particularly valuable for photo-assisted charge storage applications.
Integrating sunlight capture and charge storage in a single architecture has been a long-standing goal in sustainable energy research.
This study also demonstrates the synergy between experimental and theoretical insights in materials research. While experiments confirmed enhanced capacitance and durability, theoretical simulations revealed the atomic-level mechanisms driving these improvements. Together, they provide a comprehensive understanding of how nanostructured materials can be optimized for light-responsive energy storage.
This work, published in Sustainable Energy & Fuels (Royal Society of Chemistry Journal), introduces a new class of smart, photo-rechargeable energy storage devices. Overall, this research represents a paradigm shift in renewable energy storage. With further development, such systems could play a pivotal role in achieving India’s clean energy ambitions and inspiring similar innovations worldwide.
The announcement that WEX, a major US fleet card provider, can finally combine gasoline and public EV charging into one card, one account, and one invoice lands as a small milestone that only looks novel if the frame of reference is strictly American. For US fleet operators, this closes a ... [continued]
Electric vehicles are ‘batteries on wheels’ and have capabilities beyond transportation. Because of the recent frigid weather and snow, someone mentioned the fact that a Ford Lightning can be used as backup power during an outage. Of course, it isn’t only Lightnings that can provide such backup power. Potentially, any ... [continued]
According to a new report from Paren, about 18,000 new fast EV chargers were installed in the US in 2025. “U.S. fast-charging networks expanded meaningfully in 2025, adding approximately 18,000 new DC fast-charging ports, a ~30% year-over-year increase. Deployment increasingly favored larger, higher-capacity stations, reflecting a continued shift toward sites ... [continued]
Nearly a decade ago, I gave a presentation at EVBox’s rEVolution conference in Amsterdam. One of the other presenters at the even was the head of The Mobility House, founder and then-CEO Thomas Raffeiner. The company’s focus: vehicle-to-grid technology. It was clear he and The Mobility House had been working ... [continued]
The announcement that WEX, a major US fleet card provider, can finally combine gasoline and public EV charging into one card, one account, and one invoice lands as a small milestone that only looks novel if the frame of reference is strictly American. For US fleet operators, this closes a ... [continued]
Electric vehicles are ‘batteries on wheels’ and have capabilities beyond transportation. Because of the recent frigid weather and snow, someone mentioned the fact that a Ford Lightning can be used as backup power during an outage. Of course, it isn’t only Lightnings that can provide such backup power. Potentially, any ... [continued]
According to a new report from Paren, about 18,000 new fast EV chargers were installed in the US in 2025. “U.S. fast-charging networks expanded meaningfully in 2025, adding approximately 18,000 new DC fast-charging ports, a ~30% year-over-year increase. Deployment increasingly favored larger, higher-capacity stations, reflecting a continued shift toward sites ... [continued]
Nearly a decade ago, I gave a presentation at EVBox’s rEVolution conference in Amsterdam. One of the other presenters at the even was the head of The Mobility House, founder and then-CEO Thomas Raffeiner. The company’s focus: vehicle-to-grid technology. It was clear he and The Mobility House had been working ... [continued]
Charging an EV at home doesn’t seem like an inconvenience—until you find yourself dragging a cord around a garage or down a rainy driveway, then unplugging and coiling it back up every time you drive the kids to school or run an errand. For elderly or disabled drivers, those bulky cords can be a physical challenge.
As it was for smartphones years ago, wireless EV charging has been the dream. But there’s a difference of nearly four orders of magnitude between the roughly 14 watt-hours of a typical smartphone battery and that of a large EV. That’s what makes the wireless charging on the 108-kilowatt-hour pack in the forthcoming Porsche Cayenne Electric so notable.
To offer the first inductive charger on a production car, Porsche had to overcome both technical and practical challenges—such as how to protect a beloved housecat prowling below your car. The German automaker demonstrated the system at September’s IAA Mobility show in Munich.
This article is part of our special report Top Tech 2026.
With its 800-volt architecture, the Cayenne Electric can charge at up to 400 kW at a public DC station, enough to fill its pack from 10 to 80 percent in about 16 minutes. The wireless system delivers about 11 kW for Level 2 charging at home, where Porsche says three out of four of its customers do nearly all their fill-ups. Pull the Cayenne into a garage and align it over a floor-mounted plate, and the SUV will charge from 10 to 80 percent in about 7.5 hours. No plugs, tangled cords, or dirty hands. Porsche will offer a single-phase, 48-ampere version for the United States after buyers see their first Cayennes in mid-2026, and a three-phase, 16-A system in Europe.
Porsche’s Wireless Charging is Based on an Old Concept
The concept of inductive charging has been around for more than a century. Two coils of copper wire are positioned near one another. A current flowing through one coil creates a magnetic field, which induces voltage in the second coil.
In the Porsche system, the floor-mounted pad, 78 centimeters wide, plugs into the home’s electrical panel. Inside the pad, which weighs 50 kilograms, grid electricity (at 60 hertz in the United States, 50 Hz in most of the rest of the world) is converted to DC and then to high-frequency AC at 2,000 V.The resulting 85-kilohertz magnetic field extends from the pad to the Cayenne, where it is converted again to DC voltage.
The waterproof pad can also be placed outdoors, and the company says it’s unaffected by leaves, snow, and the like. In fact, the air-cooled pad can get warm enough to melt any snow, reaching temperatures as high as 50 °C.
The Cayenne’s onboard charging hardware mounts between its front electric motor and battery. The 15-kg induction unit wires directly into the battery.
In most EVs, plug-in (conductive) AC charging tops out at around 95 percent efficiency. Porsche says its wireless system delivers 90 percent efficiency, despite an air gap of roughly 12 to 18 cm between the pad and vehicle.
Last year, Oak Ridge National Laboratory transferred an impressive 270 kilowatts to a Porsche Taycan with 95 percent efficiency.
“We’re super proud that we’re just below conductive AC in charging efficiency,” says Simon Schulze, Porsche’s product manager for charging hardware. Porsche also beats inductive phone chargers, which typically max out at about 70 percent efficiency, Schulze says.
When the car gets within 7.5 meters of the charging pad, the Cayenne’s screen-based parking-assist system turns on automatically. Then comes a kind of video game that requires the driver to align a pair of green circles on-screen, one representing the car, the other the pad. It’s like a digital version of the tennis ball some people hang in their garage to gauge parking distance. There’s ample wiggle room, with tolerances of 20 cm left to right, and 15 cm fore and aft. “You can’t miss it,” according to Schulze.
Induction loops detect any objects between the charging plate and the vehicle; such objects, if they’re metal, could heat up dangerously. Radar sensors detect any living things near the pad, and will halt the charging if necessary. People can walk near the car or hop aboard without affecting a charging session.
Christian Holler, Porsche’s head of charging systems, says the system conforms to International Commission on Non-Ionizing Radiation Protection standards for electromagnetic radiation. The field remains below 15 microteslas, so it’s safe for people with pacemakers, Porsche insists. And the aforementioned cat wouldn’t be harmed even if it strayed into the magnetic field, though “its metal collar might get warm,” Schulze says.
The Porsche system’s 90 percent efficiency is impressive but not record-setting. Last year, Oak Ridge National Laboratory (ORNL) transferred 270 kW to a Porsche Taycan with 95 percent efficiency, boosting its state of charge by 50 percent in 10 minutes. That world-record wireless rate relied on polyphase windings for coils, part of a U.S. Department of Energy project that was backed by Volkswagen, Porsche’s parent company.
That effort, Holler says, spawned a Ph.D. paper from VW engineer Andrew Foote. Yet the project had different goals from the one that led to the Cayenne charging system. ORNL was focused on maximum power transfer, regardless of cost, production feasibility, or reliability, he says.
By contrast, designing a system for showroom cars “requires a completely different level of quality and processes,” Holler says.
High Cost Could Limit Adoption
Cayenne buyers in Europe will pay around €7,000 (roughly US $8,100) for the optional charger. Porsche has yet to price it for the United States.
Loren McDonald, chief executive of Chargeonomics, an EV-charging analysis firm, said wireless charging “is clearly the future,” with use cases such as driverless robotaxis, curbside charging, or at any site “where charging cables might be an annoyance or even a safety issue.”
But for now, inductive charging’s costly, low-volume status will limit it to niche models and high-income adopters, McDonald says. Public adoption will be critical “so that drivers can convenience-charge throughout their driving day—which then increases the benefits of spending more money on the system.”
Porsche acknowledges that issue; the system conforms to wireless standards set by the Society of Automotive Engineers so that other automakers might help popularize the technology.
“We didn’t want this to be proprietary, a Porsche-only solution,” Schulze says. “We only benefit if other brands use it.”
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