H55 Showcases Exceptional Electric Propulsion Performance in Desert Conditions

**DESERT HEAT, STEADY POWER: H55 DELIVERS UNMATCHED PERFORMANCE IN HOT CLIMATES**

SION, Switzerland and PALO ALTO, Calif., June 13, 2025 /PRNewswire/ — H55, an innovator in electric aviation and a technological spinoff from the renowned Solar Impulse project, recently concluded the fourth leg of its Across America tour in Las Vegas from June 2–6. During this event, the Swiss-engineered electric propulsion system (EPS) showcased its capabilities in one of the country’s most challenging flight environments.

In the extreme conditions of the Mojave Desert, the B23 Energic—a fully electric general aviation and flight trainer aircraft—demonstrated the reliability of electric propulsion in high heat and low-density altitude scenarios. The performance of the aircraft was impeccable, confirming the EPS’s resilience and its consistent power output, independent of temperature or altitude.

At the core of the B23 Energic’s performance lies H55’s proprietary battery and energy management system, designed to deliver optimal performance even in harsh conditions. Unlike combustion engines, which can falter in high temperatures and at elevated altitudes, H55’s thermal regulation architecture ensures steady power output and safe operations regardless of the ambient environment.

### Flight Demonstrations Highlight Reliability and Versatility

The H55 flight operations team, led by Céline Bonnefous (Lead Flight Test Engineer), along with Sasa Blagec and Serge de Wit (Flight Readiness Engineers), and pilot Laurent Wulser, executed a series of demonstration flights with U.S. Air Force test pilots, airline and commercial pilots, flight instructors, and aviation enthusiasts from both Nevada and nearby states. Throughout these intense desert heat conditions, the aircraft exhibited no decline in performance.

“The H55 electric engine isn’t impacted by density altitude,” stated Céline Bonnefous, H55’s Lead Flight Test Engineer. “It provides consistent power regardless of heat or elevation, unlike piston engines that depend on air density for combustion. In hot or high-altitude scenarios, these aircraft experience significant drops in performance, especially during takeoff. This is a significant advantage for flight schools and regional hubs operating in demanding environments.”

### What Pilots Are Saying…

Flight schools nationwide are experiencing the future of aviation training firsthand. Paniau Lindsey, Chief Flight Instructor at Vegas Aviation, shared his impressions after flying the B23 Energic: “This was my first time using a center stick, and I thought I would struggle—but it was easy. I’m still amazed. Before flying, I kept wondering, ‘How can we fly a plane without gas?’ But once we were airborne, everything was perfect. It’s incredibly quiet—we even removed our headsets and could still talk to each other. I plan to discuss this with my school immediately; I want several of these aircraft. It’s clean, simple, quiet, and flies wonderfully. Takeoff was effortless, and steep turns posed no challenge. It’s an ideal training aircraft. A beautiful flight—this is exciting.”

### Next Stop: The Heart of Silicon Valley

California has always been strategically important for H55. The company made its first appearance in the region in 2013 with Solar Impulse I and returned in 2017 with Solar Impulse II, marking significant milestones in its journey toward electric aviation. Silicon Valley has played a crucial role in H55’s early development, being home to its primary investor, ND Capital, as well as several initial backers.

For the investment community in Silicon Valley, this presents a compelling opportunity to engage with a product that has been operational since 2019 and is now in the final stages of certification while generating commercial interest through an expanding order book. The B23 Energic, powered by H55’s certified electric propulsion system, is not merely a prototype; it is a fully functional aircraft validated through years of testing and demonstration.

With well-defined regulatory pathways established by EASA and FAA, and strong demand from flight schools, original equipment manufacturers (OEMs), and operators, the platform is poised for market entry and scalable deployment. For investors, it represents a unique combination of technological maturity, regulatory preparedness, and commercial traction.

H55 will be at San Carlos Airport (SQL) at Skyway Center from June 14-16 and will be hosted by the Bay Area Urban Eagles at Palo Alto Airport (PAO) from June 17-25, forming the fifth stop of the tour. The two organizations are collaborating to introduce American audiences to the potential of fully electric, zero-emission flight, providing quiet and low-maintenance aircraft.

Additionally, H55 has been invited by the Hiller Aviation Museum to participate in their Biggest Little Air Show on June 14, 2025, allowing the public to get a close-up look at the future of electric aviation.

### The Launch of a New Platform

As H55 connects with communities nationwide, it is also fostering a movement toward sustainable flight. To support this growing initiative, H55 has launched its new Ambassador Program and website, inviting aviation and aerospace professionals, industry leaders, regulators, and aviation enthusiasts of all ages to join in its mission and help shape the future of clean aviation. For more information and to apply, visit: [H55 Ambassadors Program](https://across-usa.h55.ch/h55-ambassadors/).

### About H55

H55 is a Swiss-based company established by the former management team of Solar Impulse: André Borschberg, Sebastien Demont, and Gregory Blatt. Committed to revolutionizing the aviation sector, H55 offers certified electric propulsion and battery management systems designed for a wide range of aircraft, with the goal of achieving sustainable air travel. H55 provides certified electric propulsion systems along with complete airplane integration solutions for general aviation and regional transport aircraft. Through its pioneering efforts and dedication to certified solutions, H55’s team of visionary engineers and aerospace experts is at the forefront of advancing the aviation industry, setting new standards and redefining the possibilities of electric aviation.

For more details, visit: [www.h55.ch](http://www.h55.ch) or contact: press@h55.ch.