Solar-Powered Drone with Unprecedented One-Year Flight Duration


In the vast expanse of technological advancements, the aerospace industry stands at the forefront, pushing the boundaries of what’s possible. One such remarkable innovation is the Phasa-35 solar drone, a pioneering aircraft that operates solely on solar power. Developed by BAE Systems, this electric drone has captured the imagination of military strategists and aerospace enthusiasts alike. With its potential to remain airborne for an astonishing year, the Phasa-35 introduces a new era of high-altitude, long-endurance drones.

A Marvel of Solar-Powered Flight

Imagine a drone that defies conventional limitations, capable of cruising the skies for extended durations, unmatched by its peers. The Phasa-35 embodies this vision, and its recent 24-hour flight over the skies of New Mexico serves as a testament to its groundbreaking capabilities. Equipped with numerous solar panels adorning its extensive wings, this drone has undergone rigorous development since 2018.

The Phasa-35’s unique design, combining electric propulsion with solar panels, offers the promise of unparalleled endurance. It hovers gracefully in the stratosphere at altitudes of up to 20,000 meters, showcasing its potential as a high-altitude pseudo-satellite (HAPS). Its maiden flight in 2020 marked the beginning of an era defined by innovation and boundless possibilities.


Technical Marvels

The Phasa-35 boasts technical marvels that set it apart in the world of aerospace. With a wingspan stretching an impressive 35 meters, it can accommodate a payload of up to 15 kilograms. What truly sets it apart, however, are its lightweight batteries, recharged entirely through solar energy. This technological feat empowers the Phasa-35 to glide with exceptional finesse during the night and ascend with the dawn.

The drone’s energy-efficient design is a masterstroke, ensuring prolonged flight without the need for traditional refueling or battery swaps. This is especially crucial in scenarios where sustained surveillance or communication capabilities are paramount.

Military Utility

While the Phasa-35’s capabilities are awe-inspiring, its primary mission is military in nature. Sponsored by the technical center of the U.S. Space and Missile Defense Command, this solar drone is a strategic asset for the U.S. military.

  1. Reconnaissance and Intelligence: Equipped with state-of-the-art sensors, the Phasa-35 serves as an invaluable reconnaissance and intelligence platform. Its ability to operate at high altitudes allows it to gather critical data while remaining beyond the reach of conventional aircraft.
  2. Communication Systems: In addition to its surveillance capabilities, the drone can carry communication systems, including those for 4G and 5G coverage. This makes it an ideal choice for establishing or enhancing communication networks in remote or critical areas.
  3. Support in Natural Disasters: The Phasa-35’s endurance and versatility position it as a valuable asset in disaster management. It can provide real-time data, surveillance, and communication support during natural disasters, aiding in response and recovery efforts.
  4. Border Surveillance: Patrolling national borders is another mission where the Phasa-35 can excel. Its long-endurance flight capabilities and sophisticated sensors make it an effective tool for monitoring and securing borders.
  5. Support in Remote Areas: In remote or underserved regions, the drone’s communication capabilities can bridge connectivity gaps, providing critical access to information and resources.

A Challenge to Existing Records

While the Phasa-35’s 24-hour flight is undeniably impressive, it’s important to note that it faces competition from other solar drones in its class. Airbus’ Zephyr S, for instance, set a remarkable flight duration record of 64 days in June 2022 before a fateful crash in August of the same year. While the Phasa-35 has yet to reach such staggering heights of endurance, it has firmly established itself as a serious contender in the field of high-altitude, long-endurance drones.


The Phasa-35 solar drone represents a remarkable achievement in aerospace technology. Its ability to stay aloft for extended durations, powered solely by solar energy, is a testament to human ingenuity and innovation. While its primary mission is military, its applications extend to various civil scenarios, where its endurance and capabilities can make a significant impact.

As we delve deeper into the age of high-altitude, long-endurance drones, it’s essential to remain vigilant about their applications and implications. While the Phasa-35 opens doors to countless possibilities, ethical considerations, responsible usage, and safety measures must accompany its deployment.

In conclusion, the Phasa-35 solar drone is a remarkable advancement in aerospace technology, showcasing what can be achieved when innovation meets sustainability. Its journey has just begun, and the skies are no longer the limit; they are the new frontier for solar-powered endurance and exploration.