At Intersolar Europe 2025, global solar technology leader LONGi Green Energy Technology Co., Ltd. (LONGi) unveiled its EcoLife premium residential solar module series, a groundbreaking innovation powered by Heterojunction Back Contact (HBC) cell technology. Combining the efficiency advantages of heterojunction (HJT) cells with the light-trapping capabilities of back contact (BC) designs, EcoLife modules set new benchmarks for performance, durability, and safety in the residential solar sector.
A Leap in Cell Efficiency: 27.3% Sets a Global Standard
The EcoLife series achieves a record-breaking cell efficiency of 27.3% and module efficiency of 25%, making it the most efficient monocrystalline silicon PV module commercially available today. This achievement stems from LONGi’s proprietary HJT+BC cell architecture, the world’s first mass-produced HBC solution. By integrating full-surface passivation (from HJT) with dual-sided light absorption (from BC), the technology eliminates carrier recombination losses at metallization sites—a critical bottleneck in conventional cell designs—while boosting open-circuit voltage to 750mV, a key driver of high yields.
Residential-Centric Design: 510W Output in a Compact Footprint
Tailored for European rooftops, the 54-cell bifacial variant of EcoLife delivers a peak power output of 510W and power density of 250W/m². Compared to mainstream TOPCon modules, this translates to 40W higher output per module and a 9% increase in rooftop capacity under identical area constraints—a game-changer for space-constrained urban installations.
Industry-Leading Reliability: Built to Withstand Extremes
The EcoLife series redefines durability with:
- Ultra-Low Temperature Coefficient (-0.24%/°C): Reduces power losses in high-temperature environments by 30% versus conventional modules, ensuring consistent yields in southern Europe’s hot summers.
- Zero First-Year Degradation, 0.35%/Year Linear Degradation: Guarantees >90% power retention after 30 years, outperforming industry averages by 20%.
- Extreme Load Resistance: 4m Snow Load (6,000 Pa) and Category 15 Hurricane-Force Winds (3,600 Pa): Surpasses IEC 62817 standards for residential modules.
- Class A Fire Rating: Meets stringent EU building codes for fire safety.
- Structural Innovation: Stronger, Safer, and More Resilient
LONGi’s in-house advancements underpin EcoLife’s robustness:
- TaiRay Silicon Substrate: A 10μm-thicker wafer boosts mechanical strength by 16%, reducing microcrack risks from hail or debris by 40%.
- All-Back-Contact “I-Bar” Interconnection: Lowers cell-edge stress by 48%, preventing hidden cracking and extending module lifespan.
- Triple-Sided Passivation + Anti-Hotspot Design: Mitigates localized overheating by 28% (38°C) under partial shading, slashing hotspot formation and fire risks by 65% compared to TOPCon modules.
The EcoLife series will commence full-scale distribution across Europe in August 2025, with pre-orders now open for installers and homeowners prioritizing high yields, zero-maintenance reliability, and sleek aesthetics. LONGi’s European sales team will offer site-specific design support to maximize rooftop potential.
