Efficiency leader, no clear weak spot
The Jetion JT SLt(B) 620-650W series consists of dual-glass modules built with N-type TOPCon monocrystalline half-cut cells, delivering more stable output and reduced energy losses under partial shading conditions. The bifacial design captures reflected light from the surrounding surface, boosting real-world energy yield without increasing the installation footprint. The dual-glass construction combined with multi-busbar (MBB) technology limits microcracking and improves heat dissipation, allowing the panels to maintain high performance even in demanding operating conditions. Certified for 1500V DC systems, the series simplifies string design with fewer BoS components, lowering wiring and mounting structure costs. A robust aluminum frame and an IP68-rated junction box ensure durability in installations exposed to moisture and variable weather. The JT SLt(B) series fits residential, commercial, and utility-scale projects alike, where long-term reliability is a priority. Backed by a 12-year product warranty and 30-year linear performance warranty, this series is an attractive choice for investors seeking a lower LCOE and predictable returns over several decades of operation.
Ranking
Signals from the data
Commercial, utility-scale and shaded-installations.
Top 16% of the TOPCon 650-700 W segment, against a median of 22.40%.
Top 18% of the TOPCon 650-700 W segment, against a median of 223.7.
Top 21% of the TOPCon 650-700 W segment, against a median of 53.2.
Monocrystalline N-TOPCon half-cut cells reduce partial-shading losses and deliver a lower LID/LeTID degradation rate than older PERC technology, resulting in higher and more stable energy yield over the system's lifetime.
The dual-glass bifacial design captures reflected (albedo) radiation from the ground surface, potentially adding several percentage points of extra energy depending on surface type - a key advantage for utility-scale PV farms and flat-roof installations, without increasing installed footprint.
Jetion Solar is listed on the BloombergNEF Tier-1 Module Maker Tiering (2Q 2026), easing project financing through banks and investment funds and confirming the reliability and financial stability of a manufacturer operating since 2004.
The series' peak efficiency of 24.1% matches the best-in-class benchmark in the segment (e.g., Hanersun Hitouch 6N at the same 650W power) and clearly outperforms BYD AURO N NLBK-39 (23.25%) and Astronergy ASTRO N5 (23.3%), meaning higher yield per m² at the same panel footprint.
Certified 1500V DC system voltage enables longer string configurations, reducing the number of BoS components (cabling, mounting structure), while the IP68-rated junction box improves moisture resistance in commercial and utility-scale installations.
The series' lower efficiency bound is 23%, below the 24.1% maximum offered by the competing Hanersun Hitouch 6N at the same 650W power - buyers must verify which specific JT SLt(B) variant they're getting to secure the claimed efficiency edge.
- At 24.1% efficiency, this panel is 1.7pp above typical TOPCon 650-700W modules (median: 22.4%)
- 240.6 W/m² power density - 16.9 W/m² more than TOPCon 650-700W median (223.7 W/m²), more power per roof area
- At -0.29%/°C, hot weather performance is typical for TOPCon 650-700W panels
- 32.3 kg weight - 2.3 kg lighter than TOPCon 650-700W median (34.6 kg), reducing installation effort
- Bifacial design (85% factor) captures reflected light - adds 4-13% yield on ground-mount or white roof
Specifications
Datasheet charts
Measured curves published by Jetion in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 650 Wp appear here. The rest cover the whole series.
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.
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