“Mercedes-Benz is researching a new type of solar modules that could be seamlessly applied to the bodywork of electric vehicles,” according to a recent Mercedes-Benz press release.
They describe the 5-micrometer coating as “similar to a wafer-thin layer of paste… significantly thinner than a human hair” — but creating an active photovoltaic surface with an efficiency of 20%.
An area of 118.4 square feet (equivalent to the surface of a mid-size SUV) could produce energy for up to 7,456 miles per year under ideal conditions [based on daylight conditions from their testing in Stuttgart]. The energy generated by the solar cells is used for driving or fed directly into the high-voltage battery…
Solar paint has a high level of efficiency and contains no rare earths or silicon — only non-toxic, readily available raw materials. It is easy to recycle and considerably cheaper to produce than conventional solar modules. The Mercedes-Benz research department is currently working to enable use of the new solar paint on all exterior vehicle surfaces — regardless of shape or angle.
Solar paint could power 62% of the travel for a typical Stuttgart driver, their announcement notes. But in a sunnier city like Los Angeles, “It could be used for 100% of their driving, on average.” (And “the surplus of energy could be fed directly into the home network via bidirectional charging.”)
Mercedes-Benz researchers “initially thought the tech had limited scope for mass production,” reports EV Central, “until experiments were carried out with prototypes coated with the paint in real-world scenarios.
Instead of just coating the roof and bonnet to form a 1.8-square-metre surface area, one scientist suggested covering an entire car with the new solar paint, ramping up the surface area to more than 11m2. Another difference to the [Mercedes-Benz 2022 Vision EQXX concept] is instead of wiring the body panels to the 12-volt system, scientists hardwired the body panels to the Benz’s high-voltage battery and the performance of the paint was well beyond expectations… Available in all colours, engineers admit the solar paint work best in darker shades. When it’s launched, the tech should be as durable as regular paint. The photovoltaic surface is protected by at least two protective lacquer finishes to ensure it isn’t damaged in daily use.
Mercedes-Benz says the solar paint could mean “increased electric range and fewer charging stops.” And this is significant, because “Electric vehicle charging and infrastructure are two major obstacles to EV adoption on a mass scale,” writes Autoblog — arguing that Mercedes-Benz “may have a solution… ”
Alternative methods of energy harnessing could help alleviate range anxiety, increase an EV’s driving distance, and reduce charging costs across the board. Not only that but considering the cost of producing Mercedes’ solar coating and the lack of rare earth metals, it could be the leading solution to charging concerns… While the German automaker says the solar paint isn’t ready for production on a mass scale, research, and development are progressing at a steady rate. If all goes well, we’ll hopefully see solar coating as an accessory EV charging solution within the next decade.
Thanks to long-time Slashdot reader schwit1 for sharing the news.