An Overlooked Problem
While enjoying the clean energy from solar panels, homeowners often overlook the hidden trouble beneath them. City pigeons, especially rock doves, prefer to nest in crevices of buildings. The gap between large solar panels and the roof creates a perfect shelter — windproof and waterproof, protecting them from predators.
But this "nesting comfort" brings a chain of problems: pigeons leave behind feathers, droppings, and nesting materials. These debris not only block drainage and ventilation systems but, more critically, cause localized overheating of the solar panels. This "hot spot effect" directly reduces the lifespan and power output of the PV modules, and can even cause fires due to high temperatures, posing serious safety risks. Some insurance companies have even made the installation of bird protection measures a prerequisite for policy coverage.
2024: A Multitude of Anti-Bird Technologies
Facing this serious but hidden challenge, solar module manufacturers and related companies around the world have shown their skills in 2024, developing various new anti-bird technologies and products.
1. Physical Barriers: More Flexible Blockers
Physical barriers are currently the most common and mainstream solution. By installing physical mesh, brushes, or panels in the gaps between panels and the roof, they block pigeons' entry paths.
New Brush-Type Solution: In September 2024, Italian startup Italgam launched a new anti-bird brush called "EVO 2.0". This unique architectural product uses UV-resistant polypropylene bristles and low-carbon stainless steel wire, cleverly inserted into the gap between the PV panels and the roof. The staggered bristles allow ample airflow, ensure heat dissipation and rainwater drainage, while effectively blocking birds, leaves, and other debris. Reportedly, anti-bird business now accounts for about 90% of the company's output, with more than 1,300 solar companies widely using the product.
Higher, Smarter "Bird Skirts": At the Intersolar exhibition in July 2024, Dutch company BirdBlocker released its next-generation "BirdBlocker BB85" bird skirt. At 85mm high, it significantly simplifies installation compared to its 200mm predecessor, reduces material waste, and adapts better to complex roof surfaces such as metal, corrugated, and trapezoidal profiles. This innovation, balancing compatibility and ease of installation, opens new application scenarios for industrial and commercial rooftop PV systems requiring both high efficiency and high protection.
"Plug-and-Play" Protection: Meanwhile, US-based Bird Barrier launched a product called "Solar Stixx" in April 2024 — an innovative ready-to-install anti-bird device. It abandons the traditional tedious process of first installing clips and then unrolling long bird netting, simplifying it into an integrated assembly that greatly streamlines the installer's workflow.
2. Technology Upgrade: From Passive Defense to Smart Deterrence
Beyond physical blocking, technology development in 2024 is also showing a trend of "smart integration". Products on the market are incorporating more high-tech elements to solve bird problems more precisely and effectively, while minimizing environmental impact on other creatures.
AI-powered Acoustic Deterrence: In academia, researchers have developed automatic bird deterrent systems powered by solar energy and equipped with speakers. More advanced commercial products are deeply integrating AI (artificial intelligence) with ultrasonic technology. They use high-sensitivity visual or motion sensors to detect bird activity in real time. Only when birds approach does the device accurately trigger ultrasound or specific bird distress calls — achieving efficient, low-interference targeted deterrence, avoiding the indiscriminate noise pollution of traditional continuous-operation devices.
Integration of Photoelectric Technology: Cross-industry integration of solar technology and smart bird deterrents is also showing vigorous innovation in both China and the US. For example, Argonne National Laboratory (under the US Department of Energy) developed an AI-driven camera system that autonomously monitors bird interactions with PV facilities, providing scientific guidance for site selection and ecological protection strategies. In China, State Grid Ningxia Shizuishan Power Supply Company innovatively installed a new type of laser bird deterrent powered by a solar charging system on critical transmission lines. The device emits sweeping green laser beams from the air, combined with remotely switchable bird distress audio, creating a three-dimensional defense line that significantly improves the intelligent safety level of transmission line operations.
Success Story: A PV Plant in Linqu, Shandong, China
China is also showing no lack of innovation in applying new technologies. In August 2024, employees at the Linqu PV plant (under a Shandong-based group) faced a severe bird infestation problem. Using innovative thinking, they successfully invented a simple yet highly effective bird deterrent device.
In the development process, the team based their work on the core concept of "preventing birds from stably landing on PV modules". They came up with an elegant solution: on both ends of the front long side of each row of PV panels, add height-adjustable brackets and connect a thin iron wire suspended along the row. The wire is positioned lower than the standing height of most birds, enough to block them from landing on the PV panels — thus eliminating the birds' habit of lingering on the PV array without harming them at all. This low-cost, fully proprietary bird deterrent technology has now been fully rolled out across all PV plants under the group.
