Skip to main content
Resun Solar Brand review

RS8K-M-FB-475

475 Wp TOPCon
ComparePV verdict

Middle of its segment, needs the roof space

Rank 8,120 of 14,005
Compare panels Datasheet PDF
Power (Wp)
475
Typical for its class
Efficiency (%)
22.01
Weak · bottom 19%
Density (Wp/m²)
220.1
Weak · bottom 18%
Temp (%/°C)
-0.300
Weak · bottom 20%
Weight (kg)
23.6
Typical · median 24.0 kg
Warranty (yrs)
30
Typical · median 30 yrs

The RS8K-M-FB series is a sleek, full black photovoltaic module designed for installations where both performance and rooftop aesthetics matter. It combines TOPCon technology with a half-cell design, reducing internal power losses and minimizing the risk of hot-spot damage under partial shading. The use of 16 busbars per cell further improves current conduction efficiency and increases the panel's mechanical resistance to microcracks and busbar damage. The module also stands out for its strong PID resistance, which translates into lower power degradation over time and a reduced levelized cost of energy (LCOE) across the system's lifetime. Tempered glass with enhanced light transmittance improves energy yield even under low-irradiance conditions, while the sturdy frame withstands heavy wind and snow loads as well as harsh environments, including salt mist and ammonia exposure. As a result, the RS8K-M-FB is well suited both for residential rooftops with high aesthetic requirements and for commercial projects where long-term reliability and stable energy output throughout the module's service life are essential.

Ranking

1,089 panels in the segment TOPCon 450-500 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.01% 22.52% Weak · bottom 19% 6,491
Power density 220.1 225.2 Weak · bottom 18% 6,632
Temperature coefficient -0.300 -0.290 Weak · bottom 20% 6,093
Weight per kWp 49.7 52.2 Typical 3,195
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 · 3 caution
Best for

Residential, commercial and shaded-installations.

Not ideal for

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

Watch-outs
220.1 watts per square metre

Bottom 18% of the TOPCon 450-500 W segment, against a median of 225.2.

22.01% module efficiency

Bottom 19% of the TOPCon 450-500 W segment, against a median of 22.52%.

-0.300 %/°C temperature coefficient

Bottom 20% of the TOPCon 450-500 W segment, against a median of -0.290.

Notes from the database
  • Efficiency of 22.0% is 0.5pp below the TOPCon 450-500W median (22.5%)
  • At 220.1 W/m², this panel generates 5.1 W/m² less per unit area than TOPCon 450-500W median (225.2 W/m²)
  • Temperature coefficient of -0.30%/°C matches the TOPCon 450-500W median
  • In the top 46% for efficiency among all TOPCon panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 475 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.01 % Weak Segment median 22.52%
Vmpp · Impp 34.63 V · 13.72 A Operating point at max power
Voc · Isc 41.93 V · 14.25 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1903×1134×30 mm · 2.16 m² of roof
Weight 23.6 kg Typical Typical · median 24.0 kg
Cells 132 · TOPCon Monocrystalline
Coefficient Pmax -0.300 %/°C Weak bottom 20% 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

Datasheet charts

Open datasheet PDF

Measured curves published by Resun Solar in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 475 Wp appear here. The rest cover the whole series.

0.5% Annual Degradation over 30 years (Additional Value from Resun's Linear Warranty) 0.5% Annual Degradation over 30 years (Additional Value from Resun's Linear Warranty) 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
-

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
-

Alternatives

All Resun Solar panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Resun Solar RS8K-M-FB-475 475 W 22.01% -0.300 23.6 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +35 W, cooler, +3.0 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg Cooler, lighter, +2.8 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +30 W, cooler, +2.7 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Cooler, lighter, +2.5 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +25 W, cooler, +2.5 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg +25 W, cooler, +2.5 pp
RS8K-M-470W 470 W 21.78% -0.300 23.6 kg -0.2 pp
RS8K-M-480W 480 W 22.24% -0.300 23.6 kg +0.2 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg +85 W, cooler, +2.8 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg +80 W, cooler, +2.6 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg +75 W, lighter, +2.4 pp
JAT60S40-540/LR 540 W 24.40% -0.260 23.5 kg +65 W, cooler, +2.4 pp
GK-5-60HG-540M 540 W 24.40% -0.260 23.3 kg +65 W, cooler, +2.4 pp
JKM545-54QL6-DV-F1-EU 545 W 24.27% -0.260 27.5 kg +70 W, cooler, +2.3 pp
LR7-60HVH-545M 545 W 24.20% -0.260 25.0 kg +70 W, cooler, +2.2 pp

Found 725 panels of the same or similar size to this one, within ±10 mm. See them here Found 751 panels of the same or similar size to this one, within ±25 mm. See them here Found 870 panels of the same or similar size to this one, within ±50 mm. See them here Found 1499 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What is the maximum power output of the RS8K-M-FB panel and who is it suited for?
The RS8K-M-FB panel reaches a maximum power output of 495 Wp, making it a solid choice for both residential and larger commercial installations. High per-unit power reduces the number of modules needed to reach a given system capacity, shortening installation time and lowering the roof area required.
How does the TOPCon technology in the RS8K-M-FB differ from standard PERC panels?
TOPCon is a newer generation of silicon cell technology that uses an additional passivation layer to reduce recombination losses, achieving higher efficiency than conventional PERC cells. In practice, this means higher energy yield from the same panel area and lower power degradation over time, resulting in a lower LCOE over the system's lifetime.
Is the RS8K-M-FB suitable for roofs where aesthetics matter?
Yes, the RS8K-M-FB series is designed as a full black module, including a black frame and backsheet, which blends well with dark roof coverings. This makes it a popular choice for residential installations where energy yield and a clean, uniform roof appearance are both priorities.
What warranty comes with the RS8K-M-FB panels and what does it cover?
Resun Solar provides a 15-year product warranty along with a 30-year linear power warranty. This covers both manufacturing and material defects, as well as a guaranteed power output level over the long term, which directly affects the return on investment of a solar installation.
Does the 16-busbar design of the RS8K-M-FB have a real impact on durability and efficiency?
Yes, the 16-busbar layout increases the number of current-carrying paths on each cell, improving current collection efficiency and reducing resistive losses. It also enhances mechanical resistance to microcracks, which matters during transport, installation, and long-term operation under varying weather conditions.
Is the RS8K-M-FB resistant to harsh environmental conditions like salt mist?
Yes, the RS8K-M-FB frame is engineered to withstand heavy wind and snow loads as well as corrosion from salt mist and ammonia exposure. This makes the module suitable not only for typical European conditions but also for coastal or agricultural installations where these factors significantly affect equipment lifespan.
Add to compare