Mellow Energy / Vein Energy

Guangdong Mellow Energy Technology has reportedly completed on-vehicle application validation of its flexible perovskite roof with Chinese state-owned automaker FAW Group. 

A full-size prototype has been fitted to the vehicle's double-curved surface, and the product has now moved into vehicle-level integration validation. Mellow Energy said its 1.5 m² flexible perovskite modules have reached a conversion efficiency of 19.1%, while its 300 x 300 mm ultralight flexible modules have reached 21.79%, with both module formats passing IEC 63163 and RoHS certification. The company has supplied FAW with both the 300 x 300 mm and square-meter-scale modules, supporting the process from performance testing through solution validation to vehicle integration as part of a broader push into customized vehicle-integrated photovoltaic (VIPV) applications.

Guangdong Mellow Energy has announced that its self-developed 30×30 cm² ultra‑flexible perovskite photovoltaic module has achieved a TÜV NORD‑certified power conversion efficiency of 21.79%. The company says this places the device among the most efficient flexible perovskite modules of its size worldwide, and highlights that the module also reaches an industry‑leading power‑to‑mass ratio of 26 W/g, outperforming most mainstream thin‑film PV technologies.

Mellow Energy notes that this combination of high efficiency and extreme lightweight design is aimed specifically at aerospace and satellite applications, where every gram of payload has a direct impact on launch cost and available capacity. In current commercial satellite constellations and future large orbital infrastructure, the power‑to‑mass ratio is a core benchmark for space power systems, as higher power output per unit weight allows operators to install more equipment, extend mission lifetimes and reduce launch expenses.

Perovskite manufacturer Mellow Energy (AKA Vein Energy) has announced that its self-developed 30×30 cm² flexible perovskite solar module has achieved a power conversion efficiency of 21.13%, as certified by TÜV NORD. The company claims this result represents a record conversion efficiency for flexible perovskite modules at the same area scale.

Mellow Energy added that it is accelerating demonstration validation and scenario deployment across multiple fields, including consumer electronics, mobile energy, vehicle-integrated PV, aerospace, and satellites, to promote the transition of perovskite products toward scaled application and commercialization.

Researchers from Jinan University, Guangdong Mellow Energy and Shanghai Jiao Tong University have reported a flexible perovskite solar cell architecture that combines data‑driven machine‑learning optimization with a targeted passivation scheme based on amorphous grain‑boundary engineering to simultaneously address power conversion efficiency, operational stability and mechanical reliability. The perovskite microstructure is tailored to suppress nonradiative recombination, mitigate ion‑migration pathways and enhance fracture tolerance under repeated bending, enabling flexible devices with high efficiency, extended durability under environmental stressors and robustness suitable for lightweight, large‑area modules for wearable, vehicular and building‑integrated photovoltaic applications.

The optimized architecture delivers flexible perovskite solar cells with a power conversion efficiency of 24.52%, while maintaining 92.5% of the initial efficiency after 10,000 bending cycles, 95% after 300 days in ambient conditions and 80% after 650 h of continuous maximum power point tracking. Certified flexible modules reach 21.09% efficiency at an aperture area of 21.07 cm² and 17.38% at 0.5 m² (86.9 W output), while a larger 1.4725 m² module delivers 226 W with a specific power of 558 W kg⁻¹, underscoring the scalability of the amorphous grain‑boundary engineering approach. These metrics collectively show that the strategy both advances the state of the art in flexible perovskite device efficiency and mitigates key reliability bottlenecks that have historically impeded the transition to large‑area, application‑relevant modules.

Accoring to reports, perovskite manufacturer Mellow Energy has announced a 30 × 30 cm perovskite PV module, with a TÜV SÜD-certified conversion efficiency of 24.36%. 

The company stated this represents a new world record for modules of this size. According to the test report, the module’s forward-scan efficiency reached 23.72% and reverse-scan efficiency 24.36%, with an Isc of 0.410 A, Voc of 55.993 V, and FF of 80.26%.