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Tesla Powerwall 2 is completely dominating the US home energy storage market: report

(Credit: nathanwoodgc /Instagram)

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A recently-published report from EnergySage, an online comparison-shopping marketplace for rooftop solar and energy storage systems, has revealed something quite incredible. Despite Tesla Energy’s understated ramp, the Powerwall 2 has actually been dominating the United States’ residential battery storage market — and the competition is not even close. 

Tesla Energy’s domination is due in no small part to the Powerwall 2’s pricing, which makes it the least expensive storage option on a per-kWh stored basis. 

The findings about Tesla’s humble residential battery unit were shared by EnergySage in its eleventh semiannual Solar Marketplace Intel Report, which covers the 12-month period from July 2019 to June 2020. This time around, the company decided to look into transaction-level battery storage data from its Solar Marketplace. These included information about energy storage solutions that are usually being quoted to homeowners. 

(Credit: EnergySage)

Based on EnergySage’s report, over half of the battery storage quotes in the platform included a Tesla Powerwall. This made Tesla’s humble residential battery unit the most-quoted battery storage option in the platform by a wide margin. 

As noted in a report from PV Magazine USA, part of the reason behind the Powerwall 2’s domination of the energy storage segment is Tesla’s aggressive pricing, which undercuts competitors to a significant degree. On a cost per kWh stored basis, Tesla offers the cheapest battery storage option in EnergySage’s Marketplace, with its strongest competitor, LG Chem, offering alternatives that are over 30% more expensive. Other competitors are far more disadvantaged against the Powerwall 2 on a cost per kWh basis. 

“To date, the two most widely quoted storage brands on the EnergySage Marketplace are Tesla and LG Chem, in line with installation data from California’s Self Generation Incentive Program (SGIP) over the last few years. Presently, over half of all quotes on EnergySage are for the Tesla Powerwall 2. Looking at installed costs, Tesla is also the lowest cost offering on a dollar per kilowatt-hour ($/kWh) basis. Interestingly, two companies who use lithium iron phosphate (LFP) battery chemistries–Enphase and sonnen–see the highest $/kWh costs in the Marketplace,” the report noted

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The Powerwall 2 may be Tesla’s most humble battery storage unit, but it holds a lot of potential. Boasting an integrated DC/AC converter, off-grid capabilities, and mobile app support, the Powerwall 2 has all the elements of a classic Tesla product. The battery unit, just like the company’s electric cars, receives over-the-air updates, optimizing its performance and adding new features. Among these is Storm Watch, which maximizes energy storage during inclement weather and other conditions that may threaten the power grid. 

EnergySage’s full Solar Marketplace Intel Report could be accessed below. 

EnergySage SolarMarketplace Intel Report H22019 H12020 by Simon Alvarez on Scribd

Simon is an experienced automotive reporter with a passion for electric cars and clean energy. Fascinated by the world envisioned by Elon Musk, he hopes to make it to Mars (at least as a tourist) someday. For stories or tips--or even to just say a simple hello--send a message to his email, simon@teslarati.com or his handle on X, @ResidentSponge.

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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.

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Image Credit: Tesla/Twitter

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.

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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.”

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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.

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Credit: Tesla Asia/X

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.

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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.

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Energy

Tesla recalls Powerwall 2 units in Australia

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(Credit: nathanwoodgc /Instagram)

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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