Energy
Tesla battery expert says they’ve doubled lithium-ion battery cell life
The following post was originally published on EVANNEX
Tesla [NASDAQ: TSLA] is not standing still when it comes to improving lithium-ion technology and reducing battery costs. It was recently reported that Tesla’s battery partner, Panasonic, announced that, “We think the existing technology can still extend the energy density of Li-ion batteries by 20% to 30%. But there is a trade-off between energy density and safety. So if you look for even more density, you have to think about additional safety technology as well. Solid-state batteries are one answer.”
But many feel solid state batteries are years away. That said, are there other next-gen solutions that might come to fruition sooner? It turns out that Tesla has one of the world’s premiere battery experts, Jeff Dahn, working on a myriad of potential solutions (see below). And Dahn recently explained that: “doubling the lifetime of the [battery] cells used in the Tesla products… was the goal of the project and it has already been exceeded. We are not going to stop… we are going to go as far as we can.” Dahn said that his Tesla research is already “going into the company’s products.”
Above: Jeff Dahn explains his role with Tesla
Tesla’s new 2170 lithium-ion battery will soon appear in the Model 3. In addition to improved battery chemistry, there are ongoing cost reductions taking place as “Tesla has become the largest buyer of li-ion batteries and now [with the Gigafactory] it is trying to become the largest producer of li-ion batteries.” Kurt Kelty, Tesla’s longtime director of battery technology, is finding economies of scale sourcing raw materials: “Nickel, Cobalt, Graphite and lithium [which serve] as the biggest cost drivers for the overall battery cost.” It’s already been confirmed that Tesla has reduced battery costs overall by 35%.
Visual Captialist also points out another area where battery improvements may exist — the cathode: “Cathode choice is a major factor for determining battery energy density, and cathodes also typically account for 25% of lithium-ion battery costs. That means the cathode can impact both the performance and cost pieces of the $/kWh equation – and building a better cathode will likely be a key driver for the success of the green revolution… [and] cathode development has many exciting prospects. These include concepts such as building cathodes with layered composite structures or orthosilicates, as well as improvements to the fundamental material processes used in cathode assembly.”

Above: Tesla and other examples of commercialized cathode formulations and the metals needed for them – aside from lithium (Source: Visual Captialist via EVANNEX)
Visual Capitalist* notes that, “The type of cathode chosen can affect the energy density, power density, safety, cycle life, and cost of the overall battery, and this is why researchers are constantly experimenting with new ideas and combinations… [and] as these new technologies are applied, the cost of lithium-ion batteries will continue to decrease. In fact, experts are now saying that it won’t be long before batteries will hit $80/kWh – a cost that would make EVs [electric vehicles] undeniably cheaper than traditional gas-powered vehicles.” Check out the infographic below for more clues into how changes to the cathode could represent further improvements to the lithium-ion battery.
Energy
Tesla VP hints at Solar Roof comeback with Giga New York push
The comments hint at possible renewed life for the Solar Roof program, which has seen years of slow growth since its 2016 unveiling.
Tesla’s long-awaited and way underrated Solar Roof may finally be getting its moment. During the company’s Q3 2025 earnings call, Vice President of Energy Engineering Michael Snyder revealed that production of a new residential solar panel has started at Tesla’s Buffalo, New York facility, with shipments to customers beginning in the first quarter of 2026.
The comments hint at possible renewed life for the Solar Roof program, which has seen years of slow growth since its 2016 unveiling.
Tesla Energy’s strong demand
Responding to an investor question about Tesla’s energy backlog, Snyder said demand for Megapack and Powerwall continues to be “really strong” into next year. He also noted positive customer feedback for the company’s new Megablock product, which is expected to start shipping from Houston in 2026.
“We’re seeing remarkable growth in the demand for AI and data center applications as hyperscalers and utilities have seen the versatility of the Megapack product. It increases reliability and relieves grid constraints,” he said.
Snyder also highlighted a “surge in residential solar demand in the US,” attributing the spike to recent policy changes that incentivize home installations. Tesla expects this trend to continue into 2026, helped by the rollout of a new solar lease product that makes adoption more affordable for homeowners.
Possible Solar Roof revival?
Perhaps the most intriguing part of Snyder’s remarks, however, was Tesla’s move to begin production of its “residential solar panel” in Buffalo, New York. He described the new panels as having “industry-leading aesthetics” and shape performance, language Tesla has used to market its Solar Roof tiles in the past.
“We also began production of our Tesla residential solar panel in our Buffalo factory, and we will be shipping that to customers starting Q1. The panel has industry-leading aesthetics and shape performance and demonstrates our continued commitment to US manufacturing,” Snyder said during the Q3 2025 earnings call.
Snyder did not explicitly name the product, though his reference to aesthetics has fueled speculation that Tesla may finally be preparing a large-scale and serious rollout of its Solar Roof line.
Originally unveiled in 2016, the Solar Roof was intended to transform rooftops into clean energy generators without compromising on design. However, despite early enthusiasm, production and installation volumes have remained limited for years. In 2023, a report from Wood Mackenzie claimed that there were only 3,000 operational Solar Roof installations across the United States at the time, far below forecasts. In response, the official Tesla Energy account on X stated that the report was “incorrect by a large margin.”
Energy
Tesla China’s Megafactory helps boost Shanghai’s battery exports by 20%: report
Located in the Lingang New Area of the Shanghai Free Trade Zone, the Tesla Megafactory has been running at full throttle since opening in February.
Reports from China have indicated that the Tesla Shanghai Megafactory has become a notable player in China’s booming battery export market.
Located in the Lingang New Area of the Shanghai Free Trade Zone, the Tesla Megafactory has been running at full throttle since opening in February. It produces Tesla Megapack batteries for domestic and international use.
Tesla Shanghai Megafactory
As noted in a report from Sina Finance, the Tesla Shanghai Megafactory’s output of Megapack batteries helped drive a notable rise in lithium battery shipments from the city in the first three quarters of 2025. This is quite impressive as the Megafactory is a rather young facility, though it has been steadily increasing its production capacity.
“The establishment of this benchmark factory has not only driven the rapid development of Shanghai’s energy storage industry but also become a new growth engine for foreign trade exports. Driven by the Tesla energy storage factory’s opening, Shanghai’s lithium battery exports reached 32.15 billion yuan ($4.5 billion) in the first three quarters, a 20.7% increase,” the publication wrote.
Ultimately, the Shanghai Megafactory has proved helpful to the city’s “new three” industries, which are comprised of new energy vehicles, lithium batteries, and photovoltaic systems. Exports of the “new three” products reached 112.17 billion yuan ($15.7 billion), a 6.3% year-over-year increase during the same period. The city’s total trade volume grew 5.4% year-over-year as well, with exports up 11.3%, driven largely by the clean energy sector’s performance.
Energy storage is helping Shanghai
Since opening in February, the Shanghai Megafactory has been firing on all cylinders. In late July, Tesla Energy announced that the new battery factory has successfully produced its 1,000th Megapack unit. That’s quite impressive for a facility that, at the time, had only been operational for less than six months.
Speed has always been a trademark of the Shanghai Megafactory. Similar to Tesla’s other key facilities in China, the Megafactory was constructed quickly. The facility started its construction on May 23, 2024. Less than a year later, the site officially started producing Megapack batteries. By late March 2025, Tesla China noted that it had shipped the first batch of Megapack batteries from the Shanghai plant to foreign markets.
Energy
Tesla recalls Powerwall 2 units in Australia
Tesla will recall Powerwall 2 units in Australia after a handful of property owners reported fires that caused “minor property damage.” The fires were attributed to cells used by Tesla in the Powerwall 2.
Tesla Powerwall is a battery storage unit that retains energy from solar panels and is used by homeowners and businesses to maintain power in the event of an outage. It also helps alleviate the need to rely on the grid, which can help stabilize power locally.
Powerwall owners can also enroll in the Virtual Power Plant (VPP) program, which allows them to sell energy back to the grid, helping to reduce energy bills. Tesla revealed last year that over 100,000 Powerwalls were participating in the program.
Tesla announces 100k Powerwalls are participating in Virtual Power Plants
The Australia Competition and Consumer Commission said in a filing that it received several reports from owners of fires that led to minor damage. The Australian government agency did not disclose the number of units impacted by the recall.
The issue is related to the cells, which Tesla sources from a third-party company.
Anyone whose Powerwall 2 unit is impacted by the recall will be notified through the Tesla app, the company said.
-
Elon Musk2 weeks agoSpaceX posts Starship booster feat that’s so nutty, it doesn’t even look real
-
Elon Musk2 weeks agoTesla Full Self-Driving gets an offer to be insured for ‘almost free’
-
News2 weeks agoElon Musk confirms Tesla FSD V14.2 will see widespread rollout
-
News2 weeks agoTesla is adding an interesting feature to its centerscreen in a coming update
-
News2 weeks agoTesla launches new interior option for Model Y
-
News2 weeks agoTesla widens rollout of new Full Self-Driving suite to more owners
-
Elon Musk2 weeks agoTesla CEO Elon Musk’s $1 trillion pay package hits first adversity from proxy firm
-
News1 week agoTesla might be doing away with a long-included feature with its vehicles


