Driven by the "dual carbon" goal and the continuous expansion of photovoltaic installations, the intelligent operation and maintenance of photovoltaic power stations is undergoing a profound transformation. As one of the core carriers of this transformation, photovoltaic cleaning robots have evolved from "concept products" to becoming standard equipment in an increasing number of power stations. Alongside the robots themselves, the charging method has also undergone a technological iteration from wired to wireless - the waterproof 300W series wireless charging products of WIRELESSPT, with their compact design and stable outdoor performance, have gained continuous market recognition in this niche field and are covering more and more photovoltaic power station projects.

1. The market for photovoltaic cleaning robots has exploded, and charging has become the core bottleneck restricting efficiency.

The cleanliness of the surface of photovoltaic panels directly affects the power generation efficiency. Studies have shown that when the dust density on the surface of photovoltaic modules reaches approximately 10g/m², the output power can drop by 15% to 34%; in desert and arid areas, the peak dust loss can even reach 80%. Regular cleaning has evolved from "optional maintenance" to a "rigid requirement" for improving the return on investment of power stations.

This rigid requirement has driven the rapid expansion of the photovoltaic cleaning robot market. According to industry statistics, the global market revenue for automatic cleaning robots for photovoltaic components will be approximately 181 million US dollars in 2025, and is expected to grow at a compound annual growth rate of 13.7% to 440 million US dollars by 2032. China, as the world's largest market for photovoltaic installations, has clearly identified photovoltaic cleaning robots as a key equipment for improving the intelligent operation and maintenance level of power stations in the "14th Five-Year Plan".

However, while large-scale deployment of robots is taking place, the charging issue has become a "hidden bottleneck" for operational efficiency. Traditional photovoltaic cleaning robots mostly use wired charging or contact-type charging stations. In vast and complex outdoor photovoltaic power stations, these methods expose many shortcomings. Firstly, exposed metal contacts are prone to oxidation and contamination due to sand, rain, snow, salt fog, etc., resulting in poor contact and a significant drop in charging efficiency. Secondly, the process of plugging and unplugging charging can easily generate electric sparks, posing safety hazards in arid environments. Moreover, photovoltaic cleaning robots controlled by remote control, vision, and RTK have positional deviations when repeatedly returning for charging, often leading to charging failures. These problems severely restrict the ability of photovoltaic cleaning robots to achieve 7×24-hour fully automatic operation.

II. WIRELESSPT Waterproof 300W Series: A Wireless Charging Solution Specifically Designed for Photovoltaic Scenarios

In response to the aforementioned challenges, WIRELESSPT has launched the Waterproof 300W series of wireless charging products, which are specifically designed for photovoltaic cleaning robots. This series consists of two main models:

Waterproof 300W - 24V - 10A Wireless Charger: Rated power 300W, input voltage 36VDC, output voltage range 15-30V, output current 10A, suitable for various photovoltaic cleaning robots with 24V battery platforms.

Waterproof 300W - 48V - 5A Wireless Charger: Rated power 300W, input voltage 36VDC, output voltage range 35-60V, output current 5A, suitable for various photovoltaic cleaning robots with 48V battery platforms.

Both products adopt magnetic coupling resonant wireless power transmission technology, with a system maximum transmission efficiency exceeding 85%. In terms of charging freedom, the vertical working distance covers 0-20mm, and the horizontal offset tolerance is ±20mm on the X-axis and ±5mm on the Y-axis. This means that the robot does not require millimeter-level precision docking; it only needs to enter the charging area within a general range to automatically start charging, completely solving the problem of charging failure caused by docking deviation in traditional contact charging.

In terms of environmental adaptability, this series of products has an IP65 protection level, which can effectively prevent dust and resist low-pressure water spraying, meeting the operational requirements in outdoor rainy, snowy, and dusty weather conditions. The product adopts a highly integrated design, with the dimensions of the transmitting and receiving ends being 110mm × 110mm × 36mm. The overall volume is small, the power density is high, and it is easy to install on the compact chassis of various photovoltaic cleaning robots without significant modification of the equipment structure. It is equipped with an intelligent charging management function, which can automatically adapt to various battery types such as lithium batteries and lead-acid batteries, and supports CAN/RS485 communication interfaces, facilitating connection with the robot's control system.

III. Reliable Solutions Verified in Multiple Photovoltaic Power Stations

The waterproof 300W wireless charging product of WIRELESSPT has been put into practical operation in multiple photovoltaic power station projects, covering various scenarios from large-scale ground photovoltaic power stations in the Gobi Desert to distributed photovoltaic power stations on industrial and commercial rooftops.

In a large photovoltaic power station, after deploying the WIRELESSPT wireless charging solution, the efficiency of the cleaning robot increased by more than 30%, and the charging time was reduced by half. The robot can automatically return to the charging point to recharge after completing the cleaning task without the need for manual intervention.

A photovoltaic power station manager commented: "The wireless charger of WIRELESSPT has solved our long-standing charging problems, allowing the cleaning robot to work more efficiently. It is small in size, easy to install, and particularly friendly for our scenarios of equipment modification."

In addition, the wireless charging product of WIRELESSPT also has good compatibility and can be adapted to different models and specifications of crawler-type and hanging-type photovoltaic cleaning robots. This flexible adaptability provides convenience for the equipment selection and later upgrades of photovoltaic power stations.

IV. Company Strength: Over 10 years of accumulation, with an annual delivery capacity of 20,000 sets

WIRELESSPT was established in 2014 and is a national high-tech enterprise specializing in the research, development, production, sales, and service of high-power, industrial-grade wireless charging products. The company holds over 100 patents in the field of wireless charging, including 45 authorized invention patents. The core R&D team comes from renowned universities such as Tsinghua University and Harbin Institute of Technology, and the founder is a doctoral graduate from Tsinghua University, with over 10 years of experience in radio frequency energy transmission technology research.

In terms of production and delivery, WIRELESSPT has a 2,000-square-meter automated assembly and testing workshop in Yantai, Shandong Province, with an annual production capacity of 20,000 sets. The products have passed ISO9001 and ISO14001 system certifications, and the explosion-proof series have obtained Ex mb IIC T6 Gb gas and dust dual certifications. The waterproof series has passed IP65/IP67 protection level testing.

In the specialized field of wireless charging for photovoltaic cleaning robots, WIRELESSPT has formed a complete capability from technology research and development, product design to batch delivery. With the continuous increase in photovoltaic installation capacity and the deepening of unmanned operation requirements, wireless charging is evolving from "optional" to "standard" - and WIRELESSPT's waterproof 300W series, with its small size, easy installation, and high reliability, is becoming a practical choice for more and more power station operators.