RadianX Raises $5M, Adds $4M for Always-On Solar Devices
RadianX raises $5 million for perovskite solar packages that double indoor light harvesting, aiming to power e-readers, sensors and wearables nonstop.
Summary
As of November 5, 2026, RadianX says its perovskite material performs as well as existing solar panels outdoors and twice as well indoors, potentially extending device runtime indefinitely. Its 1.2 meter by 0.6 meter panel reaches a company-claimed record 22.33% light-harvesting efficiency. Custom-sized panels can be 0.7 millimeters thin, meet a key industry durability standard and face less wear indoors. Target applications include e-readers, factory and IoT sensors, wearables and long-runtime robots.
RadianX raised a $5 million seed round led by SOSV and Twynam, joined by One Small Planet, Sachsen Ventures, Avila VC, California Innovation Fund, quantumEDGE, Riceberg Ventures and Alumni Ventures. Pacific Union Technology Precision Manufacturing is providing another $4 million in non-dilutive investment for a dedicated commercial-volume production line. Co-founder and CEO Vivian Qu and co-founder and COO Josh Douglas plan to sell device makers complete power packages, not bare panels, including electronics tailored to perovskites rather than silicon's different light-soaking behavior. Perovskites offer high power density but remain costlier and less durable than silicon despite recent improvements.
Positives
- 22.33% efficiency from a 1.2 meter by 0.6 meter panel is the best result on record, according to RadianX.
- Twice the indoor light harvesting of existing panels could reduce charging and battery replacements for edge devices.
- $5 million in seed funding will support RadianX's move toward commercial-volume manufacturing.
- $4 million from Pacific Union Technology Precision Manufacturing will finance a dedicated production line without diluting shareholders.
- 0.7-millimeter customizable panels could fit e-readers, sensors, wearables and long-runtime robots.
Risks & concerns
- Perovskite panels remain more expensive than conventional silicon-based solar panels.
- Lower durability continues to disadvantage perovskites despite recent improvements and RadianX meeting a key industry standard.
- Commercial-volume production depends on constructing a dedicated manufacturing line with Pacific Union Technology Precision Manufacturing.
- 22.33% record efficiency is RadianX's claim, while further validation details remain limited.