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Resun Solar RS8K-M-490W
Resun Solar Brand review

RS8K-M-490W

490 Wp TOPCon
ComparePV verdict

Middle of its segment, weak in heat

Rank 6,620 of 14,005
Compare panels Datasheet PDF
Power (Wp)
490
Strong · top 12%
Efficiency (%)
22.71
Typical · median 22.52%
Density (Wp/m²)
227.1
Typical · median 225.2
Temp (%/°C)
-0.300
Weak · bottom 20%
Weight (kg)
23.6
Typical · median 24.0 kg
Warranty (yrs)
30
Typical · median 30 yrs

The Resun Solar RS8K-M (N-type TOPCon) HALF-CELL series is designed for maximum energy yield in environments where stability under any conditions is paramount. The use of N-type TOPCon cells helps to minimize losses and maintain high efficiency even at elevated temperatures and in less ideal sunlight conditions. The half-cell design also enhances resistance to microcracks and reduces the risk of performance degradation over time, which is crucial for installations designed for long-term operation.

The multi-busbar technology also deserves attention, as it improves current collection and reduces internal losses within the module, leading to more predictable annual energy production. The RS8K-M also features high resistance to hot-spot effects under partial shading, which is particularly beneficial in locations with chimneys, skylights, or trees nearby.

This is a good choice for modern residential and commercial installations, where reliability, better performance in low light, and overall system cost-effectiveness are desired.

Ranking

1,089 panels in the segment TOPCon 450-500 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.71% 22.52% Typical 3,285
Power density 227.1 225.2 Typical 3,339
Temperature coefficient -0.300 -0.290 Weak · bottom 20% 6,093
Weight per kWp 48.2 52.2 Typical 2,084
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, commercial and shaded-installations.

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 22.7% efficiency, this panel is on par with typical TOPCon 450-500W modules
  • Power density of 227.1 W/m² matches the TOPCon 450-500W median
  • At -0.30%/°C, hot weather performance is typical for TOPCon 450-500W panels
  • In the top 23% for efficiency among all TOPCon panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 490 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.71 % Typical Segment median 22.52%
Vmpp · Impp 35.05 V · 13.92 A Operating point at max power
Voc · Isc 42.38 V · 14.43 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

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-490W 490 W 22.71% -0.300 23.6 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +20 W, cooler, +2.3 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg Cooler, lighter, +2.1 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +15 W, cooler, +2.0 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Cooler, lighter, +1.8 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +10 W, cooler, +1.8 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg Cooler, lighter, +1.8 pp
RS8K-M-470W 470 W 21.78% -0.300 23.6 kg -20 W, -0.9 pp
RS8K-M-475W 475 W 22.01% -0.300 23.6 kg -15 W, -0.7 pp
RS8K-M-480W 480 W 22.24% -0.300 23.6 kg -10 W, -0.5 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg +70 W, cooler, +2.1 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg +65 W, cooler, +1.9 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg +60 W, lighter, +1.7 pp
JAT60S40-540/LR 540 W 24.40% -0.260 23.5 kg +50 W, cooler, +1.7 pp
GK-5-60HG-540M 540 W 24.40% -0.260 23.3 kg +50 W, cooler, +1.7 pp
JKM545-54QL6-DV-F1-EU 545 W 24.27% -0.260 27.5 kg +55 W, cooler, +1.6 pp
LR7-60HVH-545M 545 W 24.20% -0.260 25.0 kg +55 W, cooler, +1.5 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 warranty on Resun Solar RS8K-M TOPCon panels?
The RS8K-M series comes with a 15-year product warranty covering manufacturing defects and a 30-year linear power output warranty. The power warranty guarantees that modules will maintain a specified performance level for three decades. Resun Solar panels are additionally insured by the CHUBB Insurance Group, providing an extra layer of financial protection for both installers and end customers.
How do the N-type TOPCon cells in the RS8K-M differ from standard PERC cells?
The N-type TOPCon cells used in the RS8K-M feature higher silicon purity and a thin tunnel oxide passivation layer, which significantly reduces light-induced degradation (LID) compared to P-type PERC cells. This means slower power loss over the panel's lifetime — hence the 30-year power warranty. TOPCon is widely considered the high-efficiency successor to PERC technology in the premium module segment.
Are the RS8K-M panels a good fit for a roof with partial shading from a chimney or trees?
Yes. The half-cut cell design splits each cell into two independent electrical sections, substantially reducing power losses under partial shading. The high resistance to the hot-spot effect protects modules from overheating and damage when shadows fall unevenly across the array. The RS8K-M is a solid choice for rooftops with chimneys, dormers, or nearby vegetation where ideal solar exposure is difficult to achieve.
What is the maximum power output of the Resun RS8K-M and how many panels do I need for a home system?
The RS8K-M has a maximum power rating of 495 Wp (STC). For a typical 10 kWp residential installation, approximately 21 modules are required. Thanks to the high power density enabled by half-cut cell and multi-busbar technology, you can build a more powerful system within the same roof area compared to older, lower-wattage modules.
Does the Resun RS8K-M TOPCon perform well in overcast conditions and low irradiance?
Yes. N-type TOPCon cells demonstrate higher efficiency under diffuse and low-light conditions than older PERC technology. Combined with multi-busbar design — which shortens current paths and reduces internal resistive losses — this translates into better energy yield during early mornings, late afternoons, and cloudy days, which is a meaningful advantage in climates with frequent overcast weather.
Is the Resun Solar RS8K-M a bifacial panel?
No, the RS8K-M is a monofacial module — it collects energy from the front surface only. It does not require a high-albedo ground surface (light-colored gravel, reflective membrane) that bifacial installations depend on to generate additional rear-side yield. This makes it a straightforward, practical choice for standard pitched or flat roofs where bifacial technology would offer no meaningful energy gain.
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