Chicago-headquartered NanoGraf Technologies, which claims it has enabled the highest energy-density cylindrical 18650 Lithium-ion cell in the world, today announced that its battery has achieved a new industry energy-density milestone of 810 Wh/L (4.0Ah capacity).
Ampere hours (Ah) is the amount of energy charge in a battery that enables 1 ampere of current to flow for one hour.
In 2021, NanoGraf announced it had developed the world’s longest-running 3.8Ah 18650 cylindrical lithium-ion cell, at 800Wh/L, so this latest version reflects an improvement.
NanoGraf says in a statement that “the increased stability and highly scalable nature of [its new] silicon-anode cell solves the pain points of commercial first-generation SiOx anodes, and it is proven to be drop-in ready for existing cell designs and production processes.”
Techopedia explains what a silicon anode battery is:
A silicon anode battery is a type of lithium-ion battery where the anode is replaced by silicon nanotubes or silicon coating. The idea of using a silicon anode in a battery is still under a lot of testing. This has multiple advantages over ordinary lithium or graphite anodes. The silicon enables long life and high energy storage, resulting in a significantly longer lasting battery.
NanoGraf says that its “silicon-anode and 18650 cell represent a step forward in establishing a domestic battery supply chain, a key directive of the Biden administration to build US jobs, alleviate supply chain bottlenecks, and support a nationwide movement toward automotive electrification.”
Dr. Francis Wang, CEO of NanoGraf, said:
The Inflation Reduction Act calls for and supports the onshoring of key battery components in the US, and these historic opportunities are providing additional momentum around the adoption of upstream US innovation like NanoGraf’s.
NanoGraf products are important commercial examples of how US innovation can not only raise the bar on lithium-ion performance, but create US jobs and promote national security.
In 2019, the US Council for Automotive Research, a consortium of Ford, General Motors, and Stellantis, provided NanoGraf with $7.5 million for a 36-month electric vehicle battery research and development project.
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Today was the official start of racing at the Electrek Formula Sun Grand Prix 2025! There was a tremendous energy (and heat) on the ground at NCM Motorsports Park as nearly a dozen teams took to the track. Currently, as of writing, Stanford is ranked #1 in the SOV (Single-Occupant Vehicle) class with 68 registered laps. However, the fastest lap so far belongs to UC Berkeley, which clocked a 4:45 on the 3.15-mile track. That’s an average speed of just under 40 mph on nothing but solar energy. Not bad!
In the MOV (Multi-Occupant Vehicle) class, Polytechnique Montréal is narrowly ahead of Appalachian State by just 4 laps. At last year’s formula sun race, Polytechnique Montréal took first place overall in this class, and the team hopes to repeat that success. It’s still too early for prediction though, and anything can happen between now and the final day of racing on Saturday.
Congrats to the teams that made it on track today. We look forward to seeing even more out there tomorrow. In the meantime, here are some shots from today via the event’s wonderful photographer Cora Kennedy.
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The numbers are in and they are all bad for Tesla fans – the company sold just 5,000 Cybertruck models in Q4 of 2025, and built some 30% more “other” vehicles than it delivered. It just gets worse and worse, on today’s tension-building episode of Quick Charge!
We’ve also got day 1 coverage of the 2025 Electrek Formula Sun Grand Prix, reports that the Tesla Optimus program is in chaos after its chief engineer jumps ship, and a look ahead at the fresh new Hyundai IONIQ 2 set to bow early next year, thanks to some battery specs from the Kia EV2.
New episodes of Quick Charge are recorded, usually, Monday through Thursday (and sometimes Sunday). We’ll be posting bonus audio content from time to time as well, so be sure to follow and subscribe so you don’t miss a minute of Electrek’s high-voltage daily news.
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Tesla has launched its new Oasis Supercharger, the long-promised EV charging station of the future, with a solar farm and off-grid batteries.
Early in the deployment of the Supercharger network, Tesla promised to add solar arrays and batteries to the Supercharger stations, and CEO Elon Musk even said that most stations would be able to operate off-grid.
While Tesla did add solar and batteries to a few stations, the vast majority of them don’t have their own power system or have only minimal solar canopies.
Back in 2016, I asked Musk about this, and he said that it would now happen as Tesla had the “pieces now in place” with Supercharger V3, Powerpack V2, and SolarCity:
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All of these pieces have been in place for years, and Tesla has now discontinued the Powerpack in favor of the Megapack. The Supercharger network is also transitioning to V4 stations.
Yet, solar and battery deployment haven’t accelerated much in the decade since Musk made that comment, but it is finally happening.
Tesla has now unveiled the project and turned on most of the Supercharger stalls:
The project consists of 168 chargers, with half of them currently operational, making it one of the largest Supercharger stations in the world. However, that’s not even the most notable aspect of it.
The station is equipped with 11 MW of ground-mounted solar panels and canopies, spanning 30 acres of land, and 10 Tesla Megapacks with a total energy storage capacity of 39 MWh.
It can be operated off-grid, which is the case right now, according to Tesla.
With off-grid operations, Tesla was about to bring 84 stalls online just in time for the Fourth of July travel weekend. The rest of the stalls and a lounge are going to open later this year.
Electrek’s Take
This is awesome. A bit late, but awesome. This is what charging stations should be like: fully powered by renewable energy.
Unfortunately, it will be much harder to open those stations in the future due to legislation that Trump and the Republican Party have just passed, which removes incentives for solar and energy storage, adds taxes on them, and removes incentives to build batteries – all things that have helped Tesla considerably over the last few years.
The US is likely going to have a few tough years for EV adoption and renewable energy deployment.
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