Middle of its segment, weak in heat
The Jinko Solar Eagle 78TR G4b series is distinguished by the use of patented Tiling Ribbon (TR) technology, which eliminates gaps between cells, maximizing the active surface area of the module and increasing its power output. This is a key innovation that sets this series apart from traditional monocrystalline panels - it allows for high power output while maintaining standard module dimensions. Another distinguishing feature is the bifacial design: the panel generates energy from both the front and the back, which translates into a significantly higher energy yield over the entire lifespan, especially in installations on bright surfaces or in snowy conditions. The use of transparent backsheet instead of traditional glass makes the module lighter and cheaper to install, reducing the overall installation cost. The half-cut cells minimize losses due to partial shading and reduce module heating. The series is primarily targeted at commercial and industrial installations, where reliability, long-term energy yield, and the Fire Type 1 certification, guaranteeing safety even in demanding conditions, are crucial.
Ranking
Signals from the data
Commercial and shaded-installations.
Hot climates, weight-limited structures and tight roof space.
Bottom 20% of the 370-570 W band, against a median of -0.300.
Bottom 21% of the 370-570 W band, against a median of 52.5.
Bottom 22% of the 370-570 W band, against a median of 21.50%.
Jinko Solar's proprietary TR technology eliminates gaps between cells, maximizing the module's active area and enabling 455-475 Wp output in a standard 78-cell PERC footprint. The 9-busbar (9BB) layout further reduces resistive losses and improves micro-crack tolerance.
Jinko Solar guarantees at least 87.4% of rated power after 30 years, with an annual degradation rate of ~0.4%. The 30-year term exceeds the 25-year warranty still common across the segment and reflects confidence in the module's long-term durability.
The module carries Fire Type 1 certification per UL 61730 - a requirement increasingly mandated by building codes and insurers for commercial and industrial (C&I) rooftop installations.
A lightweight transparent backsheet instead of a rear glass pane reduces module weight and racking requirements. Compared to heavier glass-glass solutions, this lowers installation labor and overall balance-of-system (BoS) costs.
Jinko Solar has maintained Tier-1 bankability status per BloombergNEF (BNEF) continuously since 2013, ensuring project financing eligibility with banks and infrastructure funds, and providing stable warranty support and supply chain reliability.
The Eagle 78TR G4b (launched 2020) is officially discontinued. Limited availability of replacement modules and increasing serviceability challenges create operational risk for installations with a planned 25-30-year lifespan.
Peak module efficiency is 20.87%, while direct peer comparables reach 23.3-23.8%: JA Solar JAM54D40 LB and Astronergy ASTRO N7s 2.0 (both 23.8%), Longi Hi-MO X10 (23.3%). On the same roof area, those peers generate approximately 14% more energy per m².
P-type PERC cells are more susceptible to LID/LeTID degradation and exhibit a worse temperature coefficient than the N-type TOPCon or HJT technology used by all three listed peer comparables, resulting in lower long-term energy yield and higher LCOE over the module's lifetime.
- Module efficiency of 20.6% is 1.2pp below average for database panels (median: 21.8%)
- 206.5 W/m² power density is 11.6 W/m² below database median (218.1 W/m²) - requires larger installation area
- -0.35%/°C temperature coefficient - 0.05pp worse than database median (-0.30%/°C), expect higher hot weather losses
- Ranked #11092 out of 14129 panels for efficiency in the database
Specifications
Simulations
Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.
Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.
Found 5 panels of the same or similar size to this one, within ±10 mm. See them here Found 5 panels of the same or similar size to this one, within ±25 mm. See them here Found 27 panels of the same or similar size to this one, within ±50 mm. See them here Found 224 panels of the same or similar size to this one, within ±100 mm. See them here
About the Eagle 78TR G4b series
These answers cover the whole series. Where a figure differs, the specification above is this module's own.