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Tesla patent hints at stunning colored Solar Roof tiles with zero compromises

[Credit: Tesla]

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Elon Musk recently noted on Twitter that Tesla would be prioritizing the production of its Solar Roof tiles this coming 2019. These updates were announced not long after the company invited local media from Buffalo, NY to tour Gigafactory 2, the company’s facility which is producing the unique solar shingles. As Tesla continues to prepare for the ramp of the Solar Roof tiles next year, a recent patent has been published outlining a design that would allow the company to offer colored variants of the solar shingles without compromising any functionality.

Tesla’s recent patent, titled “Uniformly and Directionally Colored Photovoltaic Modules,” was published last Thursday. In the document’s background, Tesla noted that PV modules are usually blue, dark blue, or black because these are the natural color of solar cells. Considering that homeowners have preferences in their roofing material’s color, though, there is a need for the Solar Roof tiles to have varying shades and textures. There are currently several conventional ways to colorize PV modules, such the utilization of tinted glass and/or encapsulation sheets. That said, such systems are prone to absorbing large amounts of sunlight, which results in PV power loss. The appearance of standard colored PV modules also tends to degrade over time.

“Shading, or absorption of incident sunlight, causes PV power loss, a consequential problem of existing coloring techniques. In addition, colored PV modules manufactured with these techniques, and colored glass more generally, commonly suffer from: sparkle, or glint; flop, or angle-dependent color appearance; and graininess. Note that sparkle refers to glint or localized bright spots. Flop, on the other hand, usually refers to angle-dependent color, i.e. an angular dependence of the peak reflected wavelength. The term flop, or light-dark flop, can also refer to angle-dependent brightness, i.e. an angular dependence of total reflectivity.”

An illustration of Tesla’s patent for its colored Solar Roof tiles. [Credit: US Patent Office]

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Tesla’s system for its colored Solar Roof tiles utilizes a rather clever system to avoid the drawbacks of conventional PV module coloration methods. Instead of using traditional solutions like tinted glass, Tesla’s design employs a texturized surface of a glass cover that has a color filter layer, as well as a “transparent material with a predetermined refractive index.” Following is Tesla’s description of its colored Solar Roof tiles’ design.

“Embodiments of the present invention can produce PV roof tiles with a uniform color with little light absorption. As a result, a high proportion of the incident light (of colors other than the module’s intended color) is transmitted to the PV cells. To facilitate uniform coloring of PV modules and roof tiles, the inside surface of a top glass cover can be texturized, and a transparent material with a predetermined refractive index or combination of refractive indices can be deposited on the texturized surface. Such a micro-textured or frosted glass cover can display significantly less sparkle, flop, and graininess than conventional glass covers, thus improving color uniformity and appearance. Customizable directional coloring, and intentionally controlled angle-dependent color, can provide further aesthetic options, while still performing efficiently for solar conversion. It is also possible to produce a layer of sphere-shaped metal nanoparticles on the inside surface of the glass cover.

“These nanoparticles can produce colors efficiently while absorbing little light. Another feature described herein is directional coloring of PV modules or roof tiles. The texturized surface of a glass cover can have a color filter layer covering one or more facets of the texture. This color filter can include multiple thin film layers formed using a directional thin film deposition technique, such as chemical or physical vapor deposition (CVD or PVD), e.g. sputtering. The coating layer can be deposited by coating the textured glass surface in one or more directions. Such directional coating can reduce unwanted light absorption by the color filter, while still providing a uniform color appearance to viewers at a certain viewing angle.”

Tesla opted to design the colored Solar Roof tiles with textured “micro-structured” glass, which feature surface roughness on the order of 100 nm to 10 μιη. This allows the colored Solar Roof tiles to display a uniform color with little light absorption and less sparkle, flop, and graininess than conventional colored glass. The colored shingles’ design also provides customizable directional and multi-directional coating, improving the aesthetics of the Solar Roof tiles themselves while still being optimized for solar conversion.  

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Following is a comparison of conventional colored PV modules (504 and 508) and Tesla’s coloration system (502 and 506), showing how the electric car maker’s micro-structured glass design addresses sparkle, or glare; flop, or angle-dependent coloring. 

A comparison of micro-textured uniformly colored glass to conventional glass. [Credit: US Patent Office]

The Solar Roof tiles are Tesla’s flagship residential solar product. Designed to mimic the appearance of conventional roofing materials while offering all the advantages of solar panels, the Solar Roofs are an excellent way for homeowners to utilize a PV system without compromising the aesthetics of their home. The shingles were warmly received when they were unveiled back in 2016, though the production and installation of Solar Roof tiles are yet to ramp. Elon Musk explained the delay in the shingles’ production ramp during the third quarter earnings call.

“We’ll also start going into volume production of the solar tile roof next year. That’s quite a long development cycle for — because anything that’s roof has got to last 30 years. So even if you do accelerate life testing as fast as possible, there’s still a minimum amount of time required to do that. And there’s a lot of engineering that goes into how do you put on the solar tile roof with a — and not be really labor-intensive in doing so. So there’s a lot of engineering not just in the tile but in the way it’s done,” Musk said.

Back in July, Tesla CTO JB Straubel noted that the company is “aggressively” ramping its capacity to produce and deliver its residential solar products, stating that “No one should see us as stepping back from solar. In fact, it’s the opposite. It’s like with Model 3. People have come flooding in and are waiting on the product. So now we’re aggressively ramping our capacity.”  

The full text of Tesla’s patent for its colored Solar Roof tiles could be accessed here.

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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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Tesla’s newest “Folding V4 Superchargers” are key to its most aggressive expansion yet

Tesla’s folding V4 Supercharger ships 33% more per truck, cuts deployment time and cost significantly.

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Tesla V4 Supercharger installation ramping in Europe

Tesla is rolling out a folding V4 Supercharger design, an engineering change that allows 33% more units to fit on a single delivery truck, cuts deployment time in half, and reduces overall installation cost by roughly 20%.

The folding mechanism addresses one of the least glamorous but most consequential bottlenecks in charging infrastructure: getting hardware from factory floor to job site efficiently. By collapsing the form factor for transit and unfolding into an operational configuration on arrival, the new design dramatically reduces the logistics overhead that has historically slowed Supercharger rollouts, particularly at large or remote sites where multiple units are needed simultaneously.

The timing aligns with a broader acceleration in Tesla’s network strategy. In March 2026, Tesla’s Gigafactory New York produced its final V3 Supercharger cabinet after more than seven years and 15,000 units, pivoting entirely to V4 cabinet production. The V4 cabinet itself is already a generational leap, delivering up to 500 kW per stall for passenger vehicles and up to 1.2 MW for the Tesla Semi, while supporting twice the stalls per cabinet at three times the power density of its predecessor. The folding transport innovation layers logistical efficiency on top of that technical foundation.

Tesla launches first ‘true’ East Coast V4 Supercharger: here’s what that means

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Tesla Charging’s Director Max de Zegher, commenting on the V4 cabinet when it launched, captured the operational philosophy behind these changes: “Posts can peak up to 500kW for cars, but we need less than 1MW across 8 posts to deliver maximum power to cars 99% of the time.” The design philosophy has always been about maximizing real-world throughput, not just peak specs, and the folding transport upgrade extends that thinking into the supply chain itself.

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Tesla’s $2.9 billion bet: Why Elon Musk is turning to China to build America’s solar future

Tesla looks to bring solar manufacturing to the US, with latest $2.9 billion bet to acquire Chinese solar equipment.

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Tesla is reportedly in talks to purchase $2.9 billion worth of solar manufacturing equipment from a group of Chinese suppliers, including Suzhou Maxwell Technologies, which is the world’s largest producer of screen-printing equipment used in solar cell production. According to Reuters sources, the equipment is expected to be delivered before autumn and shipped to Texas, where Tesla plans to anchor its next phase of domestic solar production.

The move is a direct extension of a vision Elon Musk has been building for months. At the World Economic Forum in Davos this past January, Musk announced that both Tesla and SpaceX were independently working to establish 100 gigawatts of annual solar manufacturing capacity inside the United States. Days later, on Tesla’s Q4 2025 earnings call, he made the ambition concrete: “We’re going to work toward getting 100 GW a year of solar cell production, integrating across the entire supply chain from raw materials all the way to finished solar panels.”

Job postings on Tesla’s website reflect that same target, with language explicitly calling for 100 GW of “solar manufacturing from raw materials on American soil before the end of 2028.”

Tesla job description for Staff Manufacturing Development Engineer, Solar Manufacturing

Tesla job listing for Staff Manufacturing Development Engineer, Solar Manufacturing

The urgency behind the latest solar manufacturing target is rooted in a set of rapidly emerging pressures related to AI and Tesla’s own energy business. U.S. power consumption hit its second consecutive record high in 2025 and is projected to climb further through 2026 and 2027, driven largely by the explosion in AI data centers and the broader electrification of transportation. Tesla’s own energy division, which produces the Megapack utility-scale battery storage system, has been growing rapidly, and solar supply is a critical companion component for the business to scale. Musk has argued that solar is not just a clean energy option but the only one that makes economic sense at the scale AI infrastructure demands.

Tesla lands in Texas for latest Megapack production facility

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Ironically, the path to domestic solar independence currently runs through China. Sort of.

Despite Tesla’s stated push to localize its supply chain, mirrored recently by the company’s plan for a $4.3 billion LFP battery manufacturing partnership with LG Energy Solution in Michigan, Tesla still relies on China-based suppliers to keep its cost structure intact.

The $2.9 billion equipment deal underscores a tension Musk himself acknowledged at Davos: “Unfortunately, in the U.S. the tariff barriers for solar are extremely high and that makes the economics of deploying solar artificially high, because China makes almost all the solar.” Building the factory in America requires buying the machinery from the country Tesla is trying to reduce its dependence on.

Tesla named by U.S. Gov. in $4.3B battery deal for American-made cells

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The regulatory pathway adds another layer of complexity. Suzhou Maxwell has been seeking export approval from China’s commerce ministry, and it remains unclear how quickly that clearance will come. Still, the market has already reacted, with shares in the Chinese firms reportedly involved in the talks surged more than 7% following the Reuters report that broke the story.

Whether Tesla can hit its 2028 target of 100GW of solar manufacturing remains an open question. Though that scale may seem staggering, especially in such a short timeframe, we know that Musk has a documented history of “always pulling it off” in the face of ambitious deadlines that may slip. But, rest assured – it’ll get done.

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Elon Musk

Tesla named by U.S. Gov. in $4.3B battery deal for American-made cells

What began as an open secret in the energy industry was confirmed by the U.S. Department of the Interior on Monday: Tesla is the buyer behind LG Energy Solution’s blockbuster $4.3 billion battery supply agreement.

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What began as an open secret in the energy industry is becoming more real after the U.S. Department of the Interior named Tesla as the stakeholder in the LG Energy Solution’s blockbuster $4.3 billion battery supply agreement.

Tesla and LG Energy Solution are expanding their partnership to build a LFP prismatic battery cell manufacturing facility in Lansing, Michigan, launching production in 2027. The announcement, made as part of the Indo-Pacific Energy Security Summit results, ends months of speculation.

“American-made cells will power Tesla’s Megapack 3 energy storage systems produced in Houston, creating a robust domestic battery supply chain.”, notes a press release on the U.S. Department of the Interior website.

Tesla starts hiring efforts for Texas Megafactory

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Tesla has long utilized China’s Contemporary Amperex Technology Co. (CATL), the world’s largest LFP battery maker, as one of its primary suppliers. That relationship made financial sense for years, considering that Chinese LFP cells were cheap, abundant, and reliable. But with escalated tariffs on Chinese imports and an increasingly growing Tesla Energy business that’s particularly reliant on LFP cells for products including its Megapack battery storage units designed for utilities and large-scale commercial projects.

The announcement of a deepened partnership between LG Energy Solution and Tesla has strategic logic for both parties. For Tesla, it secures a tariff-compliant, domestically produced battery supply for its fast-growing energy division. LGES, now producing LFP batteries in Michigan, becomes the only major supplier currently scaling U.S. production, outpacing rivals like Samsung SDI and SK On. LG Energy Solution’s Lansing plant, formerly known as Ultium Cells 3, was previously operated as a joint venture with General Motors. LGES acquired GM’s stake in May 2025 and now fully owns the site, with a production capacity of 50 GWh per year. LG Energy said the contract includes options to extend the supply period by up to seven years and boost volumes based on further consultations.

For the broader industry, the ripple effects are significant. This deal signals that domestic battery manufacturing can be financially viable and not just aspirational. Utilities, energy developers, and rival automakers will take note as American-made LFP supply becomes a competitive reality rather than a distant promise.

For consumers, the benefits will take time but are real. A more resilient, U.S.-based supply chain means fewer price shocks from trade disputes, more stable Megapack availability for the grid storage projects that reduce electricity costs, and long-term downward pressure on energy storage prices as domestic production scales.

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Deliveries are set to begin in 2027 and run through mid-2030, and as grid storage demand accelerates, reliable, US-made battery supply is no longer a future ambition. It is becoming a core requirement of the country’s energy strategy.

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