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Resun Solar Brand review

RS7I-455M-BD

455 Wp Monocrystalline Bifacial 2500%
ComparePV verdict

Middle of its segment, weak in heat

Rank 10,312 of 14,005
Compare panels Datasheet PDF
Power (Wp)
455
Typical for its class
Efficiency (%)
20.93
Typical · median 21.35%
Density (Wp/m²)
209.3
Typical · median 213.2
Temp (%/°C)
-0.390
Weak · bottom 1%
Weight (kg)
25.5
Weak · 1.7 kg above median
Warranty (yrs)
30
Typical · median 30 yrs

RS7I-450~455M-BD is a bifacial photovoltaic module built on monocrystalline half-cut cells based on 166 mm wafers, arranged in a 144-cell (6x24) configuration, which translates into high energy yield even under partial shading. Thanks to bifacial technology, the panel captures light reflected from the ground, generating additional energy gain from the rear side of the module - a solution that is particularly cost-effective in installations over bright or reflective surfaces, such as gravel, sand, or membrane-covered roofs. The applied anti-reflective, hydrophobic coating reduces dust accumulation and improves light absorption, resulting in more stable energy production during mornings, evenings, and cloudy conditions. The module's construction ensures resistance to harsh operating conditions - the panels perform well in coastal areas, deserts, and near bodies of water, withstanding high wind and snow loads. An additional advantage is the positive power tolerance of 0 to +5W, guaranteeing consistent production parameters and minimizing the risk of underestimating installation output. The RS7I-BD series is a solid choice for commercial and industrial investors seeking long-term, predictable performance and a low levelized cost of energy (LCOE) throughout the system's life cycle.

Ranking

7,637 panels in the 355-555 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 20.93% 21.35% Typical 9,999
Power density 209.3 213.2 Typical 9,969
Temperature coefficient -0.390 -0.300 Weak · bottom 1% 13,579
Weight per kWp 56.0 52.6 Weak · bottom 24% 10,354
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

Residential and commercial.

Not ideal for

Hot climates and weight-limited structures.

Watch-outs
-0.390 %/°C temperature coefficient

Bottom 1% of the 355-555 W band, against a median of -0.300. Ranked 13,579th in the whole database.

56.0 kg per kWp

Bottom 24% of the 355-555 W band, against a median of 52.6.

Notes from the database
  • Efficiency of 20.9% is 0.9pp below the database median (21.8%)
  • Power density of 209.3 W/m² is 8.8 W/m² below database median (218.1 W/m²) - needs more roof space
  • -0.39%/°C temperature coefficient - 0.09pp worse than database median (-0.30%/°C), expect higher hot weather losses
  • Weight of 25.5 kg is typical for database panels
  • In the top 71% for efficiency among all N-type panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 455 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.93 % Typical Segment median 21.35%
Vmpp · Impp 41.70 V · 10.91 A Operating point at max power
Voc · Isc 49.50 V · 11.67 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2094×1038×35 mm · 2.17 m² of roof
Weight 25.5 kg Weak Weak · 1.7 kg above median
Cells 144 Monocrystalline
Bifaciality 2500 % Rear output as a share of front
Coefficient Pmax -0.390 %/°C Weak bottom 1% of its segment
Coefficient Voc · Isc -0.320 · 0.050 %/°C
NOCT 45 °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
Degradation 0.50 % Per year after the first

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
-0.390 %/°C against a segment median of -0.300
-
Bifacial gain
Rear gain over light concrete: -
-

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

Alternatives

All Resun Solar panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Resun Solar RS7I-455M-BD 455 W 20.93% -0.390 25.5 kg You are here
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg Cooler, lighter, +3.9 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +50 W, cooler, +3.8 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Cooler, lighter, +3.6 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +45 W, cooler, +3.6 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg +45 W, cooler, +3.6 pp
GK-3-54HGb-500M 500 W 24.50% -0.260 21.4 kg +45 W, cooler, +3.6 pp
RS7I-425M 425 W 19.24% -0.340 25.0 kg -30 W, cooler, -1.7 pp
RS7I-430M 430 W 19.46% -0.340 25.0 kg -25 W, cooler, -1.5 pp
RS7I-435M 435 W 19.69% -0.340 25.0 kg -20 W, cooler, -1.2 pp
RS7I-440M 440 W 19.91% -0.340 25.0 kg -15 W, cooler, -1.0 pp
RS7I-445M 445 W 20.14% -0.340 25.0 kg -10 W, cooler, -0.8 pp
RS7I-450M-BD 450 W 20.70% -0.390 25.5 kg -0.2 pp
RS7I-460M 460 W 21.16% -0.340 25.0 kg Cooler, +0.2 pp
GKA120N-PRO-590W 590 W 23.82% -0.300 26.7 kg +135 W, cooler, +2.9 pp
GKA120N-PRO-585W 585 W 23.62% -0.300 26.7 kg +130 W, cooler, +2.7 pp
BGO 580 580 W 23.50% -0.290 26.0 kg +125 W, cooler, +2.6 pp

Found 234 panels of the same or similar size to this one, within ±10 mm. See them here Found 325 panels of the same or similar size to this one, within ±25 mm. See them here Found 352 panels of the same or similar size to this one, within ±50 mm. See them here Found 1158 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
Is the Resun Solar RS7I-450~455M-BD series still available for purchase?
The RS7I-450~455M-BD series has been discontinued by Resun Solar. Panels may still be available through distributor stock as clearance offers, but the manufacturer is no longer producing new batches of this model. Buyers should check current stock availability with local distributors and consider Resun Solar's current lineup for direct replacements.
What is the maximum power output of the RS7I-BD series panels and what does it depend on?
Panels in the RS7I-450~455M-BD series reach a maximum power of up to 455 Wp. The exact value within this range depends on the module's binning class and STC test conditions. Thanks to a positive power tolerance of 0 to +5W, the actual output of a purchased panel never falls below its rated nominal value, simplifying precise system sizing.
What is the warranty on RS7I-450~455M-BD panels?
The manufacturer provides a 12-year product warranty covering material and workmanship defects, along with a 30-year linear power output warranty. This means that after 30 years of operation, the panel should still deliver the manufacturer's guaranteed percentage of its initial power, making this series attractive for long-term return-on-investment projects.
What does bifacial technology offer in RS7I-BD panels and where does it perform best?
Bifacial technology allows the module to capture sunlight reflected off the ground surface with its rear side, generating additional energy yield without increasing the installation's footprint. This solution performs best on light-colored or reflective surfaces, such as gravel, sand, white roofing membranes, or near bodies of water, where light reflection is greatest.
Are RS7I-450~455M-BD panels suitable for harsh climate installations, such as coastal areas?
Yes, the RS7I-BD series is engineered for resilience in demanding operating conditions, including coastal, desert, and high-humidity environments. The panels offer strong resistance to wind and snow loads, and the anti-reflective, hydrophobic coating further reduces dust and dirt buildup, contributing to stable performance in harsh environments.
How do the half-cut cells in this series differ from standard full-size cells?
The half-cut cells used in the RS7I-BD series are monocrystalline cells cut in half from 166 mm wafers, arranged in a 144-cell (6x24) configuration. This design reduces resistive losses and improves the panel's tolerance to partial shading, since shading on one half of a cell has a smaller impact on overall module output compared to conventional full-size cells.
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