FLEXWAVE CO., LTD. is excited to participate in the Net Zero Pavilion at the 2025 Taiwan Expo in Malaysia this June, showcasing our latest achievements in sustainable energy harvesting and green technology. As a leading pioneer in Photon Energy Harvesting technology, FLEXWAVE develops autonomous power solutions that enable low-power devices to operate efficiently—even in environments without access to traditional electricity—accelerating the global journey toward smart, low-carbon systems.

Key highlights of our showcase:

🔋 FLEXWAVE Indoor PV Module
Engineered with advanced TOPCon cells and integrated waveguide optics, this module achieves a world-record indoor light conversion efficiency of 23.97% under 1000 lux fluorescent lighting. It is an ideal power source for AIoT applications, including smart sensors, e-paper displays, asset trackers, and wearable devices—replacing disposable batteries with clean, continuous energy.

🌞 Arc-solar Box – Outdoor Smart Energy System
An all-in-one, industrial-grade solution designed to power wireless sensors in outdoor environments. With a high-efficiency PV harvester, IP67 waterproof enclosure, and intelligent battery management, it eliminates wiring and battery replacement challenges. The system is built with circular economy principles: modular, upgradeable, and repairable—extending product life while reducing waste and environmental impact.

At FLEXWAVE, we believe that true Smart Cities must begin with autonomous energy.
We are more than a component supplier—we are a sustainability partner helping clients deploy long-lasting, low-maintenance energy systems that align with the net-zero vision.

Come visit our booth at the Net Zero Pavilion and discover how FLEXWAVE’s cutting-edge solar technology is empowering the next generation of green, intelligent solutions.

The European Commission warns that by 2025, 78 million batteries could be discarded daily due to the short lifespan of IoT device power solutions. While most IoT devices have a lifespan exceeding 10 years, their batteries often last just two years or less, leading to frequent replacements. This not only generates significant environmental waste but also increases maintenance costs and downtime.

FLEXWAVE recognizes this challenge and highlights how high-efficiency energy harvesting could be the key to addressing it. To demonstrate the potential of this technology, FLEXWAVE conducted an extreme test on Solar-Navi, the world’s smallest solar GPS tracker.

On Nov. 21, FLEXWAVE deliberately drained Solar-Navi’s battery to 3.0V, disabling GPS functionality and reducing the device to energy harvesting mode. The tracker was placed on the rooftop of FLEXWAVE’s headquarters, exposed solely to natural sunlight. By the next afternoon, Nov. 22, the battery voltage reached 3.6V, enabling GPS functionality to resume.

For the next 20 days, Solar-Navi sustained operations entirely on sunlight, continuously tracking and recharging its 1800mAh battery. By December 11, the battery reached 100% capacity, generating 1,949 uninterrupted GPS location records during this period. This real-world test validated the efficiency and reliability of FLEXWAVE’s energy harvester.

Bridging Sustainability, Net-Zero Technology, and Smart Cities

FLEXWAVE’s test demonstrates the potential of energy harvesting to drive the integration of environmental sustainability, net-zero technology, and smart city development:

1. Reducing Battery Waste: High-efficiency energy harvesting extends device lifespans, drastically reducing the environmental burden of battery manufacturing and disposal. This aligns with global sustainability goals by curbing the alarming levels of battery waste.
2. Minimizing Maintenance Costs: Autonomous power solutions eliminate the need for frequent battery replacements, significantly cutting maintenance costs and ensuring seamless operations in remote IoT deployments.
3. Ensuring Operational Resilience: Continuous, self-sustaining power enables uninterrupted functionality for critical IoT applications, unlocking transformative potential in areas such as healthcare and environmental monitoring.

Conclusion

The Solar-Navi’s success demonstrates the transformative potential of FLEXWAVE’s high-efficiency energy harvesting solutions.

By addressing global concerns such as battery waste, operational costs, and power reliability, FLEXWAVE is paving the way for sustainable, autonomous smart devices. These innovations not only align with environmental and technological goals but also contribute to building smarter, greener cities for a sustainable future.

Here Comes the New Efficiency Record of indoor mono-Si PV – 23.97%

Overcoming the challenge of weak and indoor lighting has long been a significant hurdle for crystalline Si PVs due to mismatched energy bandgap and the low power density of artificial lamps. For instance, a 1000 lux T5 lamp has an energy density of just 0.19 mW/cm², about 2/1000 that of sunlight (1 Sun = 100 mW/cm²). Under such conditions, conventional crystalline Si typically achieves around 10-12% efficiency.

In 2023, FLEXWAVE’s waveguide PV technology revolutionized the field by pushing the power conversion efficiency of mono-Si based PV modules beyond 20% under fluorescent light for the first time (employed 22% PERC). This milestone was showcased at EUPVSEC; menawhile, the waveguide encapsulation enables to capture photons from an incident angle of 176 degrees, as demonstrated through the masking experiments.

This year, we’ve broken our own record by pairing this technology with the latest 24.6% TOPCon solar cells, achieving an unprecedented 23.97% for mono-Si based PVs under indoor lighting conditions certified by the Photovoltaics Calibration Labotary of ITRI. This remarkable performance enhancement proves that the micro-concentration benefits of waveguide can effectively address the bandgap mismatch, enabling high-efficiency monocrystalline silicon cells to maintain substantial power output even in low-light environments.

This mass-produced module not only puts mono-Si at the forefront of the low-light energy harvesting market but also declares a competitive efficiency compare to the commercialized thin-film PVs. Additionally, silicon materials boast a proven track record of over 40 years of durability in outdoor applications, which ensuring extremely reliable performance both indoors and out.

Join us in celebrating this groundbreaking achievement as we continue to lead the way in energy harvesting innovation and deliver the best performance for the Smart and Net Zero future!

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Flexwave provides high efficient PV energy harvesting solution to support the wireless endnodes in both indoor and outdoor, and it’s honor to be reported by PV Magazine.

https://www.pv-magazine.com/2023/10/11/taiwanese-startup-launches-pv-system-for-remote-sensors-tracking-systems/