Skip to main content
Risen Brand review

RSM156-9-610-635BNDG (620W)

620 Wp TOPCon Bifacial 80%
ComparePV verdict

Middle of its segment, needs the roof space

Rank 2,853 of 14,129
Compare panels Datasheet PDF
Power (Wp)
620
Typical for its class
Efficiency (%)
22.20
Weak · bottom 12%
Density (Wp/m²)
221.8
Weak · bottom 9%
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
33.5
Typical · median 32.8 kg
Warranty (yrs)
30
Typical · median 30 yrs

The Risen RSM156-9-61etrym-635BNDG series was designed to maximize energy yield from the same surface area - especially where every square meter of space counts. N-type cells in TOPCon technology help limit performance degradation over time, resulting in a more predictable energy output over the long term. This is an excellent choice for investors prioritizing LCOE and real yield, rather than just catalog specifications.

The modules are bifacial, enabling them to also utilize reflected light from the ground - benefiting ground-mounted installations, carports, and industrial rooftops with light membranes. The dual glass construction enhances resistance to environmental factors, facilitating operation in demanding locations and minimizing the risk of micro-cracks during operation. Additionally, the high thermal resistance of TOPCon technology contributes to more stable performance in hot conditions.

This series is particularly recommended for utility-scale PV farms and the C&I segment, where yield, longevity, and long-term reliability are key.

Ranking

1,085 panels in the segment TOPCon 600-650 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.20% 22.80% Weak · bottom 12% 5,881
Power density 221.8 227.7 Weak · bottom 9% 5,933
Temperature coefficient -0.290 -0.290 Typical 2,220
Weight per kWp 54.0 53.1 Typical 8,326
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

5 positive · 4 caution
Best for

Commercial, utility-scale and hot-climate.

Not ideal for

Roofs where every square metre has to count and tight roof space.

Watch-outs
221.8 watts per square metre

Bottom 9% of the TOPCon 600-650 W segment, against a median of 227.7. Ranked 5,933rd in the whole database.

22.20% module efficiency

Bottom 12% of the TOPCon 600-650 W segment, against a median of 22.80%.

What owners get
N-type TOPCon cells

TOPCon technology reduces LID-related degradation and performs better under high operating temperatures than older PERC cells, which at 610-635 Wp and up to 22.7% efficiency translates into more predictable annual yield - important for investors focused on LCOE.

Bifacial dual-glass construction

The module captures light reflected from the ground, boosting yield in ground-mounted installations, carports, and industrial roofs with light-colored membranes. The glass-glass build also improves environmental resistance and lowers microcrack risk compared to glass-foil designs.

Tier-1 manufacturer with 38 years of history

Risen has been in operation since 1986 and holds bankable Tier-1 status, lowering project financing risk and improving confidence in warranty servicing compared to less established brands among the peer comparables.

30-year linear power warranty

The power warranty covers 30 years, matching segment leaders such as Longi Hi-MO X10 and exceeding the standard 25-year term common among competitors, which improves project bankability.

High unit power up to 635 Wp

For the same mounting footprint the series delivers up to 635 Wp, simplifying string sizing and reducing BoS costs (cabling, racking) in large utility-scale and C&I installations.

Trade-offs
Lower efficiency than segment leaders

A maximum efficiency of 22.7% is noticeably behind comparable 635 Wp modules such as Sunpro Power TOPCon 210R (23.51%) and Longi Hi-MO X10 (23.5%), meaning less energy generation from the same roof or ground area.

Shorter product warranty than some competitors

The 15-year product warranty is a standard market term, but segment leaders increasingly extend it to 25 years while keeping the same 30-year power warranty, which may affect the perceived value of Risen's offer in TCO-based tenders.

Notes from the database
  • Module efficiency of 22.2% is 0.6pp below average for TOPCon 600-650W panels (median: 22.8%)
  • Power density of 221.8 W/m² is 5.9 W/m² below TOPCon 600-650W median (227.7 W/m²) - needs more roof space
  • At -0.29%/°C, hot weather performance is typical for TOPCon 600-650W panels
  • 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces
  • Ranked #5881 out of 14129 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 620 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.20 % Weak Segment median 22.80%
Vmpp · Impp 46.67 V · 13.30 A Operating point at max power
Voc · Isc 55.82 V · 14.16 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2465×1134×30 mm · 2.80 m² of roof
Weight 33.5 kg Typical Typical · median 32.8 kg
Cells 156 · TOPCon Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.290 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.250 · 0.046 %/°C
NOCT 44 °C At 800 W/m², 20 °C ambient
Product warranty 15 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 542 W guaranteed
Degradation 0.40 % Per year after the first

Datasheet charts

Open datasheet PDF

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 620 Wp appear here. The rest cover the whole series.

Industry-Leading Linear Power Warranty Industry-Leading Linear Power Warranty Whole series I-V Curves at Different Cell Temperatures I-V Curves at Different Cell Temperatures Whole series

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-
With bifacial gain
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.290 %/°C against a segment median of -0.290
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Filter these
Size
Panel Power Eff. Temp. Weight Difference
Risen RSM156-9-610-635BNDG (620W) 620 W 22.20% -0.290 33.5 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg +30 W, lighter, +3.0 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, lighter, +2.8 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg +50 W, lighter, +2.6 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg +50 W, lighter, +2.6 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg Cooler, lighter, +2.6 pp
JKM650-670N-66QL6-BDV (670W class) 670 W 24.80% -0.260 32.5 kg +50 W, cooler, +2.6 pp
RSM156-9-610-635BNDG (610W) 610 W 21.80% -0.290 33.5 kg -10 W, -0.4 pp
RSM156-9-610-635BNDG (615W) 615 W 22.00% -0.290 33.5 kg Very close match
RSM156-9-610-635BNDG (625W) 625 W 22.40% -0.290 33.5 kg Very close match
RSM156-9-610-635BNDG (630W) 630 W 22.50% -0.290 33.5 kg +10 W, +0.3 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +60 W, lighter, +3.0 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg +55 W, lighter, +2.8 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +80 W, cooler, +2.8 pp
WST-675BKX72-A2 675 W 25.00% -0.260 32.1 kg +55 W, cooler, +2.8 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg +75 W, cooler, +2.7 pp

Found 616 panels of the same or similar size to this one, within ±10 mm. See them here Found 616 panels of the same or similar size to this one, within ±25 mm. See them here Found 616 panels of the same or similar size to this one, within ±50 mm. See them here Found 1838 panels of the same or similar size to this one, within ±100 mm. See them here

About the RSM156-9-610-635BNDG series

6 answered

These answers cover the whole series. Where a figure differs, the specification above is this module's own.

What warranty does the Risen RSM156-9-610-635BNDG series come with?
The RSM156-9-610-635BNDG series includes a 15-year product warranty covering materials and workmanship, along with a 30-year linear power output warranty. Risen guarantees at least 95.4% of rated power after 10 years and no less than 87.4% after 30 years. Risen Energy's Tier-1 Bloomberg NEF status adds credibility to these long-term commitments for investors focused on LCOE.
Are the Risen RSM156-9-610-635BNDG modules suitable for utility-scale or C&I solar installations?
Yes, this is one of the primary target applications for this series. With up to 635 Wp per module, the higher wattage reduces total module count and lowers BoS costs. The N-type TOPCon technology combined with a dual-glass structure delivers a lower LCOE over time. The series is particularly well-suited for ground-mounted utility farms, carports, and large flat-roof C&I installations.
What does bifacial mean for the Risen RSM156-9-610-635BNDG and when does it make financial sense?
Bifacial modules harvest energy from both the front side via direct irradiance and from the rear side via albedo reflected off the ground surface. This series achieves a bifaciality factor of approximately 80%, which can translate to 5-15% additional energy yield with high-albedo surfaces such as white roofing membranes, light gravel, or snow. The gain is maximized in ground-mount systems with sufficient module clearance above the ground.
How do the Risen RSM156-9-610-635BNDG panels perform during high-temperature conditions?
TOPCon technology delivers a power temperature coefficient of -0.29%/°C, which is meaningfully better than typical PERC modules at around -0.35%/°C. In practical terms, for every degree Celsius the cell temperature rises above 25°C, power loss is lower than with most PERC alternatives. This advantage compounds on hot, sunny days, making the RSM156-9-610-635BNDG series more productive in warm climates compared to older-generation technology.
How much does a Risen RSM156-9-610-635BNDG module weigh, and what mechanical loads can it withstand?
Each module weighs approximately 33.5 kg with dimensions of 2465×1134×30 mm. The dual-glass construction provides structural resistance to wind loads up to 2,400 Pa and snow loads up to 5,400 Pa under the specified installation method. The added weight compared to glass-foil modules is a direct result of the second glass layer, which in return offers superior moisture ingress protection, UV resistance, and reduced risk of microcracks during long-term operation.
How does the TOPCon technology in the Risen RSM156-9-610-635BNDG differ from standard PERC modules?
TOPCon (Tunnel Oxide Passivated Contact) uses an N-type silicon base with an ultra-thin tunnel oxide and polysilicon passivation layer that significantly reduces carrier recombination. The result is module efficiency of approximately 22-22.7%, versus 20-21% for typical PERC. N-type cells also exhibit lower susceptibility to LID and LeTID degradation, meaning the RSM156-9-610-635BNDG series sustains higher real-world energy output over the full 30-year operational lifespan.
Add to compare