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Tesla’s Solar Roof patent reveals “conductive paste” used for tile bonding

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Tesla was granted a patent for its Solar Roof on August 29 for a new way to bond the roof shingles together, pushing forward a more efficient way to construct and install its photovoltaic roof tiles.

The patent, a 28-page request for “Systems, Method, and Apparatus for Curing Conductive Paste,” allows Tesla to bond solar cell-embedded tiles with an adhesive that is thermally cured under heat, and enables electrical conductivity between the bonded materials.

The conductive paste would allow solar roof tiles to be stacked in a cascading style and still maintain conductivity across the entire roof.

This method is a departure from convection or solder bonding, which the patent points out as potentially inefficient. The new adhesive would allow Tesla to install a solar roof in a quicker manner, and would allow electricity to flow between panels through the substance.

Curing of the adhesive could take under a minute, according to CBInsights.

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The patent comes as questions swirl surrounding Tesla’s involvement in solar roof development. While the company’s sleek, natural-looking solar roofs are sold out through the end of the year, little news has surfaced regarding installations and development.

The first Tesla solar roof installations were completed in early August on employees’ homes including Musk’s, while pilot production remained largely at its Fremont factory.

“The first Solar Roof installations have been completed recently at the homes of our employees, who we chose to be our first customers to help perfect all aspects of Solar Roof customer experience,” said Tesla in a Q2 Update Letter. “By pairing either Solar Roof or our existing retrofit solar panels with a Powerwall, our customers can enjoy sustainable energy independence.”

The installations and development comes in the wake of SolarCity founder and longtime solar developer Peter Rive left the company in July, departing eight months after the company was purchased by Tesla for $2.6 billion. Rive joined his brother and other top executives in leaving the company.

Despite the executive-level departures, Tesla’s Solar Roof has been pegged as not only affordable, but practical by Consumer Reports. The consumer ratings agency compared the cost of a Tesla solar roof in New York, Texas and California and deemed that — depending on factors such as electricity cost and sun exposure — the numbers generated by Tesla’s Solar Roof calculator check out.

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Energy

Tesla inks multi-billion-dollar deal with LG Energy Solution to avoid tariff pressure

Tesla has reportedly secured a sizable partnership with LGES for LFP cells, and there’s an extra positive out of it.

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Credit: Tesla

Tesla has reportedly inked a multi-billion-dollar deal with LG Energy Solution in an effort to avoid tariff pressure and domesticate more of its supply chain.

Reuters is reporting that Tesla and LGES, a South Korean battery supplier of the automaker, signed a $4.3 billion deal for energy storage system batteries. The cells are going to be manufactured by LGES at its U.S. factory located in Michigan, the report indicates. The batteries will be the lithium iron phosphate, or LFP, chemistry.

Tesla delivers 384,000 vehicles in Q2 2025, deploys 9.6 GWh in energy storage

It is a move Tesla is making to avoid buying cells and parts from overseas as the Trump White House continues to use tariffs to prioritize domestic manufacturing.

LGES announced earlier today that it had signed a $4.3 billion contract to supply LFP cells over three years to a company, but it did not identify the customer, nor did the company state whether the batteries would be used in automotive or energy storage applications.

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The deal is advantageous for both companies. Tesla is going to alleviate its reliance on battery cells that are built out of the country, so it’s going to be able to take some financial pressure off itself.

For LGES, the company has reported that it has experienced slowed demand for its cells in terms of automotive applications. It planned to offset this demand lag with more projects involving the cells in energy storage projects. This has been helped by the need for these systems at data centers used for AI.

During the Q1 Earnings Call, Tesla CFO Vaibhav Taneja confirmed that the company’s energy division had been impacted by the need to source cells from China-based suppliers. He went on to say that the company would work on “securing additional supply chain from non-China-based suppliers.”

It seems as if Tesla has managed to secure some of this needed domestic supply chain.

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Tesla Shanghai Megafactory produces 1,000th Megapack for export to Europe

The Shanghai Megafactory was able to hit this milestone less than six months after it started producing the Megapack. 

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Credit: Tesla Asia/X

Tesla Energy has announced a fresh milestone for its newest Megapack factory. As per the electric vehicle maker, the Shanghai Megafactory has successfully produced its 1,000th Megapack battery. 

The facility was able to hit this milestone less than six months after it started producing the grid-scale battery system. 

New Tesla Megapack Milestone

As per Tesla Asia in a post on its official accounts on social media platform X, the 1,000th Megapack unit that was produced at the Shanghai Megafactory would be exported to Europe. As noted in a CNEV Post report, Tesla’s energy products are currently deployed in over 65 countries and regions globally. This allows Tesla Energy to compete in energy markets that are both emerging and mature.

To commemorate the 1,000th Megapack produced at the Shanghai Megafactory, the Tesla China team posted with the grid-scale battery with celebratory balloons that spelled “Megapack 1000.” The milestone was celebrated by Tesla enthusiasts on social media, especially since the Shanghai Megafactory only started its operations earlier this year.

Quick Megafactory Ramp

The Shanghai Megafactory, similar to Tesla’s other key facilities in China, was constructed quickly. The facility started its construction on May 23, 2024, and it was hailed as Tesla’s first entry storage project outside the United States. Less than a year later, on February 11, 2025, the Shanghai Megafactory officially started producing Megapack batteries. And by March 21, 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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While the Shanghai Megafactory is still not at the same level of output as Tesla’s Lathrop Megafactory, which produces about 10,000 Megapacks per year, its ramp seems to be quite steady and quick. It would then not be surprising if Tesla China announces the Shanghai Megafactory’s 2,000th Megapack milestone in the coming months.

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Tesla launches first Virtual Power Plant in UK – get paid to use solar

Tesla has launched its first-ever Virtual Power Plant program in the United Kingdom.

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Credit: Tesla Energy | X

Tesla has launched its first-ever Virtual Power Plant program in the United Kingdom. This feature enables users of solar panels and energy storage systems to sell their excess energy back to the grid.

Tesla is utilizing Octopus Energy, a British renewable energy company that operates in multiple markets, including the UK, France, Germany, Italy, Spain, Australia, Japan, New Zealand, and the United States, as the provider for the VPP launch in the region.

The company states that those who enroll in the program can earn up to £300 per month.

Tesla has operated several VPP programs worldwide, most notably in California, Texas, Connecticut, and the U.S. territory of Puerto Rico. This is not the first time Tesla has operated a VPP outside the United States, as there are programs in Australia, Japan, and New Zealand.

This is its first in the UK:

Tesla is not the only company that is working with Octopus Energy in the UK for the VPP, as it joins SolarEdge, GivEnergy, and Enphase as other companies that utilize the Octopus platform for their project operations.

It has been six years since Tesla launched its first VPP, as it started its first in Australia back in 2019. In 2024, Tesla paid out over $10 million to those participating in the program.

Tesla VPP program in California hits new capacity milestone

Participating in the VPP program that Tesla offers not only provides enrolled individuals with the opportunity to earn money, but it also contributes to grid stabilization by supporting local energy grids.

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