Energy
This Tesla Powerwall owner didn’t realize there was a blackout amid intense heat wave
A Tesla Powerwall 2 owner is thanking his home battery system after it allowed him and his family to stay cool and comfortable despite a widespread blackout in the middle of a heat wave last week in Sydney, Australia.
After power was cut in his area, homeowner Carl Prins received a text message from his Tesla mobile app informing him that his Powerwall 2 battery was in backup mode. As the Sydney resident would later find out, around 45,000 properties in the city’s eastern suburbs were without power at the time, due to a widespread power outage resulting from overgrown weeds near an electrical substation.
Over the course of the roughly hour-long blackout, Prins kept cool using his home’s air conditioners. He also watched TV while taking care of his baby daughter. The homeowner noted in a statement to The Sydney Morning Herald that his system’s transition from grid power to battery power was so seamless, he did not even notice that there was a power outage.
“I didn’t initially realize the power had gone out, but then I got a text notification from the app to say that it was now in backup mode.”
Last Thursday’s power outage hit Sydney at 11:26 a.m, right in the middle of a heatwave. The blackout disrupted council services and left medical facilities running on backup generators, while forcing some shops to close. Houses, even those fitted with rooftop solar panels but without the ability to store the energy, were forced to wait out the blackout. Power was restored to all affected areas by 12:37 p.m., just over an hour after the outage started.
The Sydney homeowner was unaffected by the power outage, as his house was fitted with both solar panels and a Tesla Powerwall 2 battery, which stores excess energy and performs load shifting to maximize energy cost savings. Without this system, Prins noted that he and his family would have had to travel to a shopping center or a library to keep cool.
“We would have had to get in the car and go to Westfield shopping center or the library to stay cool,” he said.
The Tesla Powerwall 2 features a 13.5 kWh lithium-ion battery and retails for around AU$12,000 (around US$8,500) in Australia. Prins’ home battery system was installed last September after five months on a waiting list. The homeowner noted that his Powerwall has resulted in energy savings, with his power bills now around AU$600 (around US$420) per year compared to AU$4,000 (around US$2,800) per year before the battery’s installation.
The use of solar power for residential properties continues to get more prevalent in Australia, with an estimated 2,000,000 homes having rooftop solar systems. Around 20,000 of these homes are estimated to be equipped with battery storage solutions like the Tesla Powerwall 2. The Powerwall 2 battery is also a key component of Tesla’s planned 50,000-strong Virtual Power Plant for South Australia.
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.
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