Efficiency leader, no clear weak spot
The Risen RSM108-11-490-515BNDG series is engineered for maximum energy gain in spaces where every square meter counts - rooftops, commercial buildings, and industrial installations. The use of N-type TOPCon cells helps mitigate typical power losses over time and enhances energy capture in less-than-ideal conditions, such as high temperatures or overcast days. This translates to more stable energy production and predictable savings.
These modules utilize a bifacial structure, enabling them to capture energy from both sides - particularly advantageous on light-colored roofs, ground-mounted systems, and car park canopies. The configuration with 108 half-cells supports performance under partial shading and minimizes internal losses, offering a real-world advantage compared to many conventional modules. Furthermore, anti-degradation solutions, including anti-LID and anti-PID, have been implemented, complemented by a long linear warranty - a key consideration for investors seeking a secure return on their installations.
Ranking
Signals from the data
Residential, commercial, shaded-installations and hot-climate.
Top 16% of the TOPCon 500-550 W segment, against a median of 22.74%.
Top 18% of the TOPCon 500-550 W segment, against a median of 227.4.
Peak module efficiency reaches 23.2% (2025H1 datasheet), putting the series on par with Sunpro Power (23.17%) and Huasun Aurora Pro (23.17%), and clearly ahead of Canadian Solar TOPBiHiKu6 (22.8%) at the same 515 Wp max power.
Dual-sided generation adds a real production bonus on bright roofs, ground-mount, or carport structures - especially valuable for installations over high-albedo surfaces, a potential mono-facial modules cannot capture.
The half-cut format lowers series resistance and mitigates partial-shading effects (hot spots, soiling-related degradation), a meaningful operational advantage over older full-cell 60/72 modules.
The manufacturer guarantees at least 87.4% of nominal power after 30 years - comparable to leading peers in this class (Sunpro, Huasun) and notably better than older PERC lines with a 25-year warranty dropping to ~84%.
The series is active and current (released in 2023, not discontinued), and Risen - founded in 1986 - holds BNEF Tier-1 status, easing bank financing for commercial and industrial projects.
15 years of product warranty is standard for the segment, but some Tier-1 manufacturers (e.g., Canadian Solar, JA Solar) in their 2025/2026 premium lines extended this to 25-30 years, matching the power warranty term - here a gap remains (15 years vs. 30 years on power), which can matter when negotiating service terms on long-term C&I projects.
- At 23.2% efficiency, this panel is on par with typical TOPCon 500-550W modules
- Power density of 231.6 W/m² packs 4.2 W/m² more into the same footprint vs TOPCon 500-550W median (227.4 W/m²)
- Temperature coefficient of -0.29%/°C matches the TOPCon 500-550W median
- Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof
- In the top 10% for efficiency among all TOPCon panels
Specifications
Datasheet charts
Measured curves published by Risen in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 515 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.
Found 471 panels of the same or similar size to this one, within ±10 mm. See them here Found 508 panels of the same or similar size to this one, within ±25 mm. See them here Found 662 panels of the same or similar size to this one, within ±50 mm. See them here Found 1476 panels of the same or similar size to this one, within ±100 mm. See them here
About the RSM108-11-490-515BNDG series
These answers cover the whole series. Where a figure differs, the specification above is this module's own.