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Risen Brand review

RSM132-8-655BMDG

655 Wp PERC Bifacial 70%
ComparePV verdict

Middle of its segment, heavy for its output

Rank 3,571 of 14,129
Compare panels Datasheet PDF
Power (Wp)
655
Weak · bottom 25%
Efficiency (%)
21.10
Typical · median 21.25%
Density (Wp/m²)
210.9
Weak · bottom 24%
Temp (%/°C)
-0.340
Typical · median -0.340
Weight (kg)
38.3
Weak · 3.8 kg above median
Warranty (yrs)
30
Typical · median 30 yrs

The Risen Titan High Performance series consists of advanced bifacial modules that redefine efficiency standards in professional photovoltaic installations. Thanks to bifacial technology, these panels absorb light not only from the front, but also reflected from the ground, which significantly increases the total energy yield per unit area. The use of PERC cells in Half-Cut architecture allows for the effective minimization of resistive losses and stable module operation even in partial shading conditions. The Titan series stands out with its low temperature coefficient, which guarantees high efficiency during hot summer days when standard solutions lose power. This product is dedicated to investors building solar farms and large commercial systems, where the key factor is maximizing the return on investment and resistance to degradation. The solid frame construction ensures exceptional resistance to mechanical loads, such as accumulated snow or strong wind. By choosing these modules, you gain advanced Multi-Busbar technology, which shortens the current flow path and increases cell reliability. This solution puts the Risen Titan series ahead of the competition, offering higher power density and better performance characteristics in low light, which translates into measurable financial benefits for the end user.

Ranking

320 panels in the segment PERC 650-700 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.10% 21.25% Typical 9,365
Power density 210.9 212.5 Weak · bottom 24% 9,527
Temperature coefficient -0.340 -0.340 Typical 8,846
Weight per kWp 58.5 52.3 Weak · bottom 14% 11,839
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

0 positive · 2 caution
Best for

Utility-scale, commercial, shaded-installations and hot-climate.

Not ideal for

Weight-limited structures and roofs where every square metre has to count.

Watch-outs
58.5 kg per kWp

Bottom 14% of the PERC 650-700 W segment, against a median of 52.3.

210.9 watts per square metre

Bottom 24% of the PERC 650-700 W segment, against a median of 212.5.

Notes from the database
  • Efficiency of 21.1% matches the PERC 650-700W median
  • Power density of 210.9 W/m² matches the PERC 650-700W median
  • Temperature coefficient of -0.34%/°C matches the PERC 650-700W median
  • At 38.3 kg (3.8 kg above PERC 650-700W median of 34.5 kg), requires checking roof load capacity
  • 70% bifaciality enables rear-side power generation, boosting yield by 4-10% on reflective surfaces

Specifications

Open datasheet PDF
Nominal power (Pmax) 655 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.10 % Typical Segment median 21.25%
Vmpp · Impp 38.05 V · 17.22 A Operating point at max power
Voc · Isc 45.69 V · 18.23 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2384×1303×33 mm · 3.11 m² of roof
Weight 38.3 kg Weak Weak · 3.8 kg above median
Cells 132 · PERC Monocrystalline
Bifaciality 70 % Rear output as a share of front
Coefficient Pmax -0.340 %/°C Typical median -0.340 of its segment
Coefficient Voc · Isc -0.250 · 0.040 %/°C
NOCT 44 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 80.0 % Equals 556 W guaranteed
Degradation 2.00 → 0.45 % First year, then annual

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

I-V characteristics at different temperatures (AM1.5, 1000W/m2) I-V characteristics at different temperatures (AM1.5, 1000W/m2) 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
-0.340 %/°C against a segment median of -0.340
-
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 RSM132-8-655BMDG 655 W 21.10% -0.340 38.3 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg Cooler, lighter, +4.1 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg Cooler, lighter, +4.1 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg Cooler, lighter, +3.9 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, lighter, +3.9 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +45 W, cooler, +3.9 pp
WST-675BKX72-A2 675 W 25.00% -0.260 32.1 kg Cooler, lighter, +3.9 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg +40 W, cooler, +3.8 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg Cooler, lighter, +3.7 pp
RSM132-8-650BMDG 650 W 20.90% -0.340 38.3 kg -0.2 pp
RSM132-8-660BMDG 660 W 21.20% -0.340 38.3 kg Very close match
RSM132-8-665BMDG 665 W 21.40% -0.340 38.3 kg +10 W, +0.3 pp
RSM132-8-670M 670 W 21.60% -0.340 33.5 kg Lighter, +0.5 pp, -5 yr warranty
AIKO-A805-GRH78Dw 805 W 25.10% -0.260 39.8 kg +150 W, cooler, +4.0 pp
AIKO-A800-GRH78Dw 800 W 24.90% -0.260 39.8 kg +145 W, cooler, +3.8 pp
AIKO-A795-GRH78Dw 795 W 24.80% -0.260 39.8 kg +140 W, cooler, +3.7 pp
AIKO-A790-GRH78Dw 790 W 24.60% -0.260 39.8 kg +135 W, cooler, +3.5 pp

Found 1393 panels of the same or similar size to this one, within ±10 mm. See them here Found 1403 panels of the same or similar size to this one, within ±25 mm. See them here Found 1403 panels of the same or similar size to this one, within ±50 mm. See them here Found 1435 panels of the same or similar size to this one, within ±100 mm. See them here

About the TITAN HIGH PERFORMANCE BIFACIAL PERC MONOCRYSTALLINE MODULE series

6 answered

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

Is the Risen Titan High Performance Bifacial PERC series still available for purchase?
The Risen Titan High Performance Bifacial PERC series has been discontinued and is no longer available as a new product through regular distribution channels. Limited stock may still exist with some distributors, but availability is highly restricted. If you are looking for modules with comparable specifications, consider newer Risen Energy lineups or other Tier 1 manufacturers offering bifacial PERC modules rated above 600 Wp.
What does bifacial technology mean in the Risen Titan panels and how much extra energy does it generate?
Bifacial technology means the Risen Titan module captures sunlight on both the front and rear sides, harvesting irradiance reflected off the ground surface - such as gravel, concrete, or white roofing membrane. Depending on the albedo of the surface below and the mounting height, this can increase energy yield by 5 to 25 percent compared to a standard monofacial module. The gain is highest in ground-mounted systems with sufficient clearance beneath the panels.
What warranty does Risen Energy provide on the Titan 670 Wp modules?
Risen Energy backs the Titan series with a 12-year product warranty covering material and workmanship defects. In addition, the manufacturer provides a 30-year linear power output warranty guaranteeing that module performance does not fall below the specified degradation curve over that period. The 30-year power warranty is one of the longest available in the industry and makes this series particularly suitable for utility-scale projects with long investment horizons.
Do Risen Titan PERC half-cut modules perform well on solar farms with partial shading?
Yes, the half-cut cell architecture used in the Risen Titan series splits each PERC cell into two independent halves. This means that shading of only part of the module - for example by a utility pole or a nearby tree - limits power loss to the shaded cells only, not the entire string. Combined with the Multi-Busbar design that shortens the current path, these modules deliver better low-light and partial-shading performance than conventional full-size cell modules.
How does the Risen Titan 670 Wp panel perform in high summer temperatures?
The Risen Titan series features a low temperature coefficient, meaning that as module temperature rises above 25 degrees Celsius, the power loss per degree is smaller than in standard panels. This matters significantly on hot summer afternoons when module temperatures can exceed 70 degrees Celsius. As a result, solar farms using Titan modules generate measurably more energy annually, directly improving the LCOE and overall return on investment.
What type of installations are Risen Titan 670 Wp modules best suited for, and can they be mounted on a rooftop?
Risen Titan 670 Wp modules are designed primarily for large commercial installations and utility-scale solar farms where maximizing power density per unit area is critical. Due to the large physical dimensions and weight typical of modules in this power class, rooftop installation on standard residential buildings is logistically challenging and may require a reinforced racking structure. This product is optimally suited for institutional investors and developers working on ground-mounted, utility-scale projects.
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