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Resun Solar Brand review

RS8K-M-DG

485 Wp TOPCon Bifacial 1000%
ComparePV verdict

Middle of its segment, weak in heat

Rank 7,226 of 14,005
Compare panels Datasheet PDF
Power (Wp)
485
Strong · top 20%
Efficiency (%)
22.47
Typical · median 22.52%
Density (Wp/m²)
224.7
Typical · median 225.2
Temp (%/°C)
-0.300
Weak · bottom 20%
Weight (kg)
26.3
Typical · median 24.0 kg
Warranty (yrs)
30
Typical · median 30 yrs

The RS8K-M-DG series is a bifacial double-glass module engineered for investors who expect maximum durability and predictable energy yield over decades of operation. The panel uses N-type TOPCon monocrystalline half-cut cells with multi-busbar (MBB) technology, which reduces internal power losses and increases resistance to microcracks and interrupted current paths - a common failure point in cheaper modules. The dual tempered glass with high transmittance and anti-reflective coating improves performance in low-light conditions, such as early morning or overcast days, when competing designs lose efficiency. Thanks to its anti-PID resistance, power degradation stays minimal, translating into a lower LCOE and a genuinely higher return on investment over the module's lifetime. The construction has passed tests for high wind loads, snow loads, and resistance to salt mist and ammonia exposure, making it suitable for rooftop installations, ground-mount farms, and agricultural sites alike. The manufacturer backs the module with a 30-year linear power warranty, making RS8K-M-DG a solution for those who value investment security, low maintenance costs, and stable energy production in demanding climates.

Ranking

1,089 panels in the segment TOPCon 450-500 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.47% 22.52% Typical 4,576
Power density 224.7 225.2 Typical 4,501
Temperature coefficient -0.300 -0.290 Weak · bottom 20% 6,093
Weight per kWp 54.2 52.2 Typical 8,473
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 · 1 caution
Best for

Residential and commercial.

Not ideal for

Hot climates.

Watch-outs
-0.300 %/°C temperature coefficient

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

Notes from the database
  • At 22.5% efficiency, this panel is on par with typical TOPCon 450-500W modules
  • Power density of 224.7 W/m² matches the TOPCon 450-500W median
  • Temperature coefficient of -0.30%/°C matches the TOPCon 450-500W median
  • Weight of 26.3 kg is 2.3 kg above TOPCon 450-500W median (24.0 kg) - verify structural support
  • #4576 for efficiency, #6093 for temperature performance out of 14005 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 485 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.47 % Typical Segment median 22.52%
Vmpp · Impp 35.90 V · 13.51 A Operating point at max power
Voc · Isc 43.05 V · 14.31 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 26.3 kg Typical Typical · median 24.0 kg
Cells 120 · TOPCon Monocrystalline
Bifaciality 1000 % Rear output as a share of front
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

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 RS8K-M-DG 485 W 22.47% -0.300 26.3 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, lighter, +2.5 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg Cooler, lighter, +2.3 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg Cooler, lighter, +2.2 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Cooler, lighter, +2.0 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg Cooler, lighter, +2.0 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg Cooler, lighter, +2.0 pp
RS8K-M-470W 470 W 21.78% -0.300 23.6 kg -15 W, lighter, -0.7 pp
RS8K-M-475W 475 W 22.01% -0.300 23.6 kg -10 W, lighter, -0.5 pp
RS8K-M-480W 480 W 22.24% -0.300 23.6 kg Lighter, -0.2 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg +75 W, cooler, +2.3 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg +70 W, cooler, +2.1 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg +65 W, lighter, +1.9 pp
JAT60S40-540/LR 540 W 24.40% -0.260 23.5 kg +55 W, cooler, +1.9 pp
GK-5-60HG-540M 540 W 24.40% -0.260 23.3 kg +55 W, cooler, +1.9 pp
JKM545-54QL6-DV-F1-EU 545 W 24.27% -0.260 27.5 kg +60 W, cooler, +1.8 pp
LR7-60HVH-545M 545 W 24.20% -0.260 25.0 kg +60 W, cooler, +1.7 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
How does the RS8K-M-DG module differ from standard monofacial panels?
The RS8K-M-DG is a bifacial module, meaning it generates power from both the front and rear sides, capturing light reflected off the ground or roof surface. With proper installation, such as on a light-colored roof or ground-mount structure, this can boost energy yield beyond what a monofacial panel of the same 485 Wp nominal power would produce, without increasing installed area.
What is TOPCon technology and why was it used in the RS8K-M-DG?
TOPCon (Tunnel Oxide Passivated Contact) is an N-type monocrystalline cell technology that reduces electron recombination and boosts efficiency compared to older PERC cells. In the RS8K-M-DG it is combined with half-cell and multi-busbar (MBB) design, further cutting current losses and improving resistance to microcracks, resulting in more stable performance over the module's lifetime.
What warranty comes with the RS8K-M-DG panels?
Resun Solar provides a 15-year product warranty and a 30-year linear power output warranty. This means the module retains a guaranteed, gradually declining power level over three decades, one of the longer terms available on the market, supporting predictable long-term return on investment.
Are RS8K-M-DG panels suitable for solar farms and harsh climate conditions?
Yes, the RS8K-M-DG design has passed tests for high wind loads, snow loads, and resistance to salt mist and ammonia exposure. It performs well on rooftops as well as in large ground-mount installations and agricultural sites, where panels face atmospheric contaminants and variable weather conditions.
What is PID resistance and why does it matter for the RS8K-M-DG?
PID (Potential Induced Degradation) is power loss caused by voltage differences between cells and the frame or ground, common in large systems with high string voltages. PID resistance in the RS8K-M-DG minimizes this effect, keeping energy output stable and lowering LCOE over the module's service life.
How does the dual-glass construction of the RS8K-M-DG improve its durability?
Dual tempered glass replaces the rear polymer backsheet used in conventional modules, increasing mechanical durability and protecting cells from moisture and corrosion. High-transmittance, anti-reflective glass also improves performance in low-irradiance conditions, such as mornings or overcast days, when monofacial panels lose efficiency.
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