How bees helped engineers fix solar panels' biggest flaw & capture more sunlight
Bees have inspired engineers to rethink solar panel design. The honeycomb structure behind their hives has provided a blueprint for tackling a persistent problem: sunlight reflecting away from panels instead of generating electricity. Conventional flat panels receive sunlight more directly around midday, but the sun's changing angle affects how much light they capture.Engineers have developed a concave, three-dimensional design that redirects reflected light towards another surface, giving it a second chance to be absorbed.
According to a report by The Pulse, the honeycomb-inspired structure increased maximum power output by 142.3% compared with a flat panel under the same conditions, offering a way to reduce wasted sunlight without tracking motors.Why angled sunlight creates a problem for solar panelsTraditional solar panels have a flat surface. As the sun moves across the sky, its rays strike that surface at different angles.
When sunlight arrives at an oblique angle, reflection from the protective glass becomes a problem. Light that bounces away cannot contribute to the panel’s electricity output.The honeycomb-inspired design changes the path of that reflected light. Rather than relying on a single flat surface, it uses sloping surfaces arranged into concave structures.How honeycomb geometry gives light another chanceInside the three-dimensional module, sunlight can strike one slanted wall and bounce towards the opposite wall.
Instead of immediately escaping, the reflected light encounters another surface where it can be absorbed. This process, described as enhanced light recapture, is central to the design.The supplied material reports a maximum power output increase of 142.3% over a conventional flat panel. At a zero-degree angle, when sunlight strikes directly, output increased by 36.4%. At 60 degrees, the reported improvement was 61.8%.These figures describe increases in power output under the stated comparison conditions, rather than the proportion of sunlight converted into electricity.Why engineers turned to the structure of a beehiveHoneycomb combines closely packed hexagonal cells with strength and efficient material use.
Engineers used this natural geometry as the basis for their solar module.Tilting the walls creates small valleys that help retain light within the structure. The benefit comes from how those surfaces redirect sunlight, allowing neighbouring surfaces to capture photons that might otherwise escape.To support the arrangement, engineers developed a flexible, printed polymer mechanical metamaterial, which is a structure whose engineered pattern helps determine its mechanical behaviour.The flexible backing could extend the design beyond flat rooftops.
The report identifies curved walls, electric vehicles and aerospace equipment as potential applications.Its ability to fit curved surfaces could allow solar modules to be incorporated into places where conventional flat panels are difficult to install.Your child uses AI every day. But do they understand it? Find out in the TOI AI Masterclass.
