An optional extra costing 8,000 yuan? Solar roof for vehicles: the next "growth opportunity"?

Will solar-powered car roofs become the next growth driver?

Recently, reports have surfaced that BYD's solar sunroofs are already in mass production, and that these "sun-generating" sunroofs are now available as an option on four popular models—the Han DM-i, Han EV, Tang DM-i, and Tang EV—at dealerships.

While there have been numerous reports in the market, BYD has not officially confirmed this information. Inquiries about the option of a solar sunroof with BYD's official website were made to customer service, who replied that "there is currently no relevant information."

Furthermore, solar sunroofs are not listed as an option on the official websites of the aforementioned popular models. Additionally, according to feedback from some netizens, inquiries at nearby dealerships also revealed that this option is not currently available.

Although the mass production of BYD's solar sunroofs has been widely discussed, in reality, there seems to be no evidence of mass production, either online or offline, and almost no actual photos of vehicles with solar sunroofs have been reported.

Therefore, BYD has not officially confirmed the mass production of its solar sunroof, and its official information platform has not reported any such information.

Can the rumored "8,000 solar sunroofs" actually materialize?

While BYD has not officially confirmed the mass production of its solar sunroof, this does not mean that the product will be impossible to mass-produce in the future.

According to previous online rumors, BYD's solar sunroof product is an integrated automotive-grade solar module jointly developed by BYD and Fuyao Glass. This product combines power generation and heat insulation functions. The sunroof uses a five-layer integrated sandwich structure with ultra-thin, high-efficiency photovoltaic cells embedded in the middle, achieving a light transmittance of 72%.

Furthermore, according to online data, BYD's 720W solar sunroof is priced at 8,000 yuan as an option, using HJT batteries with a mainstream conversion efficiency of 23.18%.

It is reported that in sunny weather in southern China, the system can generate a stable 3.5 to 4.8 kWh of electricity after being left outdoors for 8 hours, which translates to an additional 40 to 50 kilometers of driving range. In cloudy or rainy weather, the power generation drops significantly, to only about 1.5 kWh. The system prioritizes replenishing the 12V low-voltage battery, primarily to offset static power consumption during modes like Sentry Mode, with the remaining portion trickling into the main battery. The sunroof uses five layers of laminated glass, blocking 99% of ultraviolet rays and 85% of infrared rays. In direct sunlight, the interior temperature can be reduced by about 8°C, and this heat insulation effect contributes to energy savings—a hidden benefit.

Furthermore, according to previous reports, it also features a "layered sliding" design: after the car comes to a complete stop and the engine is off, the second layer of the wing automatically slides back 400 mm, increasing the light-receiving area from 1.1 square meters to 1.8 square meters, an increase of more than 60%. Once the vehicle speed exceeds 10 km/h, it automatically retracts within 20 seconds, increasing the drag coefficient by only 0.01, making its presence almost imperceptible at high speeds.

Although the 8,000 yuan solar sunroof option isn't currently listed on BYD's official website, realistically speaking, how many car owners would be willing to add 8,000 yuan for it?

According to the most widely circulated calculation online, 8,000 yuan ÷ 0.5 yuan/kWh = 16,000 kWh of electricity. Assuming an average daily power generation of 3.5 kWh, it would take 12.5 years to break even.

However, this relies on an ideal scenario: sufficient sunshine almost every day. Therefore, some netizens have commented that the 8,000 yuan charging fee is enough to last until they buy their next car.

Of course, others argue that if the solar sunroof is only considered a tool for "recovering costs through electricity generation," then the calculations don't make sense. But its value goes far beyond that. In summer, when parked outdoors, the solar panels can power the cooling fan, lowering the interior temperature; during long-distance driving, they can provide supplemental power, reducing the battery load; and the solar glass itself also provides heat insulation, sound insulation, and UV protection. In the words of an industry insider, this is more like a "comfort feature" than a "power generation and financial management tool."

Thus, the picture of solar skylights is gradually becoming clearer. It's a feature with sufficiently robust technology, but its economic viability isn't immediately apparent, and its applicability is highly dependent on sunlight conditions. Will it become the next growth driver? The answer may not be today, but rather in the technological evolution and market changes over the next three to five years.

Solar rooftops: The next growth market!

Even if this sunroof isn't in mass production yet, does that mean it won't become a standard feature in the future? It's worth considering whether solar rooftops will become the next growth driver for new energy vehicles.

In today's new energy vehicle market, competition has expanded from the three core electric systems to every detail. From refrigerators, TVs, and large sofas to in-car kitchens and rooftop tents.

Automakers are exhausting their efforts to find differentiated selling points in terms of features. Solar rooftops, however, possess a unique advantage: they are not just icing on the cake for comfort, but a real energy feature.

And with "range anxiety" still a core pain point for electric vehicle users, any means of increasing range deserves serious consideration. Even an extra 20 kilometers a day adds up to 7,000 kilometers a year.

From a marketing perspective, solar rooftops have a strong technological appeal. In a market where consumers increasingly struggle to differentiate between car models, "the roof generates its own electricity" is a simple and sufficiently differentiating selling point. Unlike "acceleration from 0 to 100 km/h in a few seconds" which requires professional testing to perceive, or the abstract and difficult-to-understand concept of "smart cockpit chip computing power," solar sunroofs charge automatically when exposed to sunlight—the visual impact is intuitive enough.

Furthermore, the most interesting aspect of solar sunroofs is that their value varies drastically depending on the usage scenario, which precisely means they can precisely target specific user groups.

Family camping and long-distance road trips are the most typical beneficiaries. In the absence of charging stations in the wild, vehicles can continuously replenish energy through sunlight while stationary. Even a few kilowatt-hours a day is sufficient to support basic electricity needs such as onboard refrigerators, lighting, and phone charging. For RV users, solar roofs are a natural fit. RVs are inherently outdoors, with larger roof areas and a more complete solar power generation value chain.

More importantly, the core variable for the large-scale adoption of solar roofs is not technology, but cost.

Looking back at the price curve of the solar industry over the past decade, module prices have dropped from over 4 yuan per watt in 2015 to around 0.7 yuan per watt in 2025, a decrease of over 80%. In early 2026, the average bid price for centralized procurement by central state-owned enterprises (SOEs) climbed from 0.75 yuan/W at the end of 2025 to 0.88 yuan/W, but remained at a historically low level. HJT module prices ranged from 0.68 to 0.77 yuan/W.

Based on a 1.8 square meter, 720W power output, the material cost of the photovoltaic modules alone is only about 500 yuan. Of course, automotive-grade packaging, five-layer laminated glass, telescopic mechanisms, and vehicle integration significantly increase costs.

Comparing the development trajectory of BIPV (Building Integrated Photovoltaics) clarifies the trend. Early BIPV systems were expensive due to customization, with initial investment 1.5 to 2 times that of traditional photovoltaics. However, with technological advancements and mass production, costs have decreased from 40 yuan/watt to 4 to 6 yuan/watt. The logic for photovoltaic car roofs is highly similar; once a car manufacturer achieves mass production, the cost curve will rapidly decline.

From a market perspective, the global automotive photovoltaic system market is experiencing rapid growth. According to QYResearch data, the global market size for automotive photovoltaic (PV) systems was approximately $136 million in 2025 and is projected to reach $444 million by 2032, representing a CAGR of 18.7%.

In today's fiercely competitive PV market, automotive PV has gradually evolved from a niche market into a seriously considered growth area.

Behind the promising prospects, three major challenges remain.

Despite the promising future, the path to mass production of PV rooftops still faces three practical challenges.

Firstly, there's the economic aspect. Based on an optional price of 8,000 yuan and a household electricity price of 0.5 yuan per kilowatt-hour, recouping the cost requires generating 16,000 kilowatt-hours of electricity. Even under ideal conditions of 3.5 kilowatt-hours per day, this would take 4,571 days, or 12.5 years. However, the replacement cycle for most passenger cars in China is within 10 years.

Furthermore, installing PV modules in vehicles is far more difficult than installing PV panels on rooftops. Cars are constantly subjected to extreme temperature differences, continuous vibration, salt spray corrosion, and gravel impacts. Photovoltaic modules need to maintain stable performance for over 15 years under such conditions. Ensuring automotive-grade reliability requires enormous R&D investment and testing costs.

Furthermore, the fragility of photovoltaic cells is another challenge. Automotive photovoltaic modules must meet stringent requirements such as pedestrian protection collision standards and roof structural strength. In the event of falling objects or gravel, the photovoltaic modules embedded in the glass layer need to be replaced entirely, resulting in repair costs far exceeding those of a regular panoramic sunroof.

However, when the optional price of photovoltaic sunroofs drops from 8,000 yuan to the 3,000-5,000 yuan range, economics will no longer be the main obstacle. As more automakers join this market and achieve economies of scale, costs will decrease rapidly. Furthermore, as photovoltaic power generation efficiency improves and power generation per unit area increases, the perceived value for users will become more tangible.

Of course, all of this depends on consumers actually being able to purchase the much-anticipated photovoltaic sunroof.