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Resun Solar Brand review

RS8I575M-BD

575 Wp TOPCon Bifacial 2500%
ComparePV verdict

Solid all-round for its segment

Rank 4,220 of 14,005
Compare panels Datasheet PDF
Power (Wp)
575
Typical for its class
Efficiency (%)
22.30
Typical · median 22.44%
Density (Wp/m²)
222.6
Typical · median 224.4
Temp (%/°C)
-0.300
Typical · median -0.290
Weight (kg)
28.6
Typical · median 31.2 kg
Warranty (yrs)
30
Typical · median 30 yrs

The RS8I-M-BD series from Resun Solar is built around N-type TOPCon cells featuring SMBB (multi busbar) technology, addressing the growing demand from investors for both efficiency and long-term durability in solar installations. Thanks to these advanced silicon cells, the panels deliver reduced power loss at high temperatures and better response to low-light conditions, translating into a real gain in energy yield under Poland's typical mix of overcast days and fluctuating temperatures. The reinforced frame construction provides strong mechanical resistance to wind and snow loads, making the BD series a solid choice for both residential rooftop installations and larger commercial projects exposed to demanding weather conditions. What sets the RS8I-M-BD apart from many competing solutions is its combination of high power density with stable long-term power degradation, directly contributing to a lower LCOE for the investment. The panels carry a full set of quality certifications (TUV, IEC, VDE, CE) along with PID-free approval, giving installers and investors confidence in the product's reliability for years to come.

Ranking

1,018 panels in the segment TOPCon 550-600 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.30% 22.44% Typical 5,100
Power density 222.6 224.4 Typical 5,549
Temperature coefficient -0.300 -0.290 Typical 6,093
Weight per kWp 49.7 53.8 Typical 3,212
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 · 0 caution
Best for

Commercial and utility-scale.

Notes from the database
  • At 22.3% efficiency, this panel is on par with typical TOPCon 550-600W modules
  • At 222.6 W/m² power density, roof space requirements are typical for TOPCon 550-600W panels
  • At -0.30%/°C, hot weather performance is typical for TOPCon 550-600W panels
  • At 28.6 kg, this panel is 2.6 kg lighter than TOPCon 550-600W median (31.2 kg) - easier handling during installation
  • Ranked #5100 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 575 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.30 % Typical Segment median 22.44%
Vmpp · Impp 42.92 V · 13.40 A Operating point at max power
Voc · Isc 51.50 V · 14.20 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2278×1134×35 mm · 2.58 m² of roof
Weight 28.6 kg Typical Typical · median 31.2 kg
Cells 144 · TOPCon Monocrystalline
Bifaciality 2500 % Rear output as a share of front
Coefficient Pmax -0.300 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.250 · 0.045 %/°C
NOCT 45 °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
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
-0.300 %/°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.

Alternatives

All Resun Solar panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Resun Solar RS8I575M-BD 575 W 22.30% -0.300 28.6 kg You are here
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg Cooler, lighter, +2.5 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg Cooler, lighter, +2.3 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg Cooler, lighter, +2.1 pp
JAT60S40-540/LR 540 W 24.40% -0.260 23.5 kg Cooler, lighter, +2.1 pp
GK-5-60HG-540M 540 W 24.40% -0.260 23.3 kg Cooler, lighter, +2.1 pp
JKM545-54QL6-DV-F1-EU 545 W 24.27% -0.260 27.5 kg -30 W, cooler, +2.0 pp
AIKO-A625-MAH72Dw 625 W 24.20% -0.260 32.5 kg +50 W, cooler, +1.9 pp
RS8I-M HC-535 535 W 20.70% -0.340 28.6 kg -40 W, hotter, -1.6 pp
RS8I-540M-BD 540 W 20.94% -0.390 29.0 kg -35 W, hotter, -1.4 pp
RS8I-M HC-540 540 W 20.89% -0.340 28.6 kg -35 W, hotter, -1.4 pp
RS8I-545M-BD 545 W 21.13% -0.390 29.0 kg -30 W, hotter, -1.2 pp
RS8I-M HC-545 545 W 21.09% -0.340 28.6 kg -30 W, hotter, -1.2 pp
RS8I-M FULL BLACK 550W 550 W 21.28% -0.390 28.6 kg -25 W, hotter, -1.0 pp
RS8I-M HC-555 555 W 21.47% -0.340 28.6 kg -20 W, hotter, -0.8 pp
RS8I-555M-F30 555 W 21.50% -0.390 27.2 kg -20 W, hotter, -0.8 pp
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg +75 W, cooler, +2.9 pp

Found 2326 panels of the same or similar size to this one, within ±10 mm. See them here Found 2368 panels of the same or similar size to this one, within ±25 mm. See them here Found 2382 panels of the same or similar size to this one, within ±50 mm. See them here Found 2547 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
How does the TOPCon technology in RS8I-M-BD panels differ from standard PERC cells?
The N-type TOPCon cells used in the RS8I-M-BD series feature an additional passivating layer that reduces electron recombination and increases energy conversion efficiency compared to older P-type PERC cells. This gives the panels better performance at high temperatures and under low-light conditions, resulting in higher annual energy yield, especially in climates with frequent cloudy days like Poland.
Does bifacial technology in RS8I-M-BD panels make sense for a pitched roof installation?
In a typical pitched roof installation, where the panel sits close to the roof surface, the bifacial effect is limited because the rear side has little access to reflected light. The full bifacial potential of RS8I-M-BD is better realized in ground-mount systems, carports, or elevated flat-roof mounts, where the rear side can capture light reflected off the ground.
What is the warranty on RS8I-M-BD panels and what does it cover?
Resun Solar provides a 15-year product warranty on the RS8I-M-BD series, covering material and workmanship defects, along with a 30-year linear power output warranty. This means the manufacturer guarantees a minimum production level over three decades, which is a key factor when calculating installation payback and directly affects the system's LCOE.
How much power does a single RS8I-M-BD panel produce, and how many are needed for a 10 kWp system?
Panels in the RS8I-M-BD series reach a maximum power of up to 575 Wp. At this power rating, a 10 kWp system requires roughly 17 to 18 modules, depending on the exact power variant chosen from the series and the system losses accounted for during design.
Do RS8I-M-BD panels perform well in low winter temperatures?
Yes, TOPCon cells have a favorable power temperature coefficient, meaning smaller efficiency losses in summer heat but also stable performance in cold winter conditions. Solar panels generally achieve higher efficiency in cooler air, provided the module isn't covered in snow, so on sunny winter days output can briefly exceed the nominal rating.
Can the reinforced frame on RS8I-M-BD panels handle heavy snow loads in Poland?
Yes, the RS8I-M-BD series is built with a reinforced frame that improves mechanical resistance to wind and snow loads. This makes the panels suitable for both residential rooftop installations and larger commercial projects in Polish regions with higher snow load requirements, though the final mounting structure should always be selected according to local load standards.
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