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Resun Solar RS8H-M-490
Resun Solar Brand review

RS8H-M-490

490 Wp TOPCon
ComparePV verdict

Middle of its segment, needs the roof space

Rank 9,201 of 14,005
Compare panels Datasheet PDF
Power (Wp)
490
Strong · top 12%
Efficiency (%)
20.64
Weak · bottom 1%
Density (Wp/m²)
206.4
Weak · bottom 1%
Temp (%/°C)
-0.350
Weak · bottom 2%
Weight (kg)
26.3
Typical · median 24.0 kg
Warranty (yrs)
30
Typical · median 30 yrs

The RS8H-M series from Resun Solar combines monocrystalline cells built with N-type TOPCon technology and a half-cut cell design, effectively minimizing power losses caused by shading and the hot-spot effect. The multi-busbar 9-11 BB grid reduces internal current losses and boosts conversion efficiency, while also lowering the risk of microcracks and busbar breakage, resulting in a longer service life for the installation. The panel also stands out for its strong resistance to PID degradation, limiting power loss over time and delivering higher energy yield with a lower LCOE. A 3.2mm tempered glass with anti-reflective coating ensures solid performance even under low-light conditions, and certified mechanical strength against wind and snow loads makes it suitable for demanding climates, including areas with elevated salt mist and ammonia exposure. RS8H-M is built for commercial and industrial investors who need high reliability, stable energy output over decades, and low annual power degradation, backed by an extended manufacturer warranty.

Ranking

1,089 panels in the segment TOPCon 450-500 W
Metric This panel Median Position in segment Overall rank
Module efficiency 20.64% 22.52% Weak · bottom 1% 11,037
Power density 206.4 225.2 Weak · bottom 1% 11,027
Temperature coefficient -0.350 -0.290 Weak · bottom 2% 10,419
Weight per kWp 53.7 52.2 Typical 7,693
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

Commercial and utility-scale.

Not ideal for

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

Watch-outs
206.4 watts per square metre

Bottom 1% of the TOPCon 450-500 W segment, against a median of 225.2. Ranked 11,027th in the whole database.

20.64% module efficiency

Bottom 1% of the TOPCon 450-500 W segment, against a median of 22.52%. Ranked 11,037th in the whole database.

-0.350 %/°C temperature coefficient

Bottom 2% of the TOPCon 450-500 W segment, against a median of -0.290. Ranked 10,419th in the whole database.

Notes from the database
  • At 20.6% efficiency, this panel is 1.9pp below the TOPCon 450-500W median of 22.5%
  • At 206.3 W/m², this panel generates 18.8 W/m² less per unit area than TOPCon 450-500W median (225.2 W/m²)
  • At -0.35%/°C, loses 0.06pp more power per degree than TOPCon 450-500W median (-0.29%/°C)
  • At 26.3 kg (2.3 kg above TOPCon 450-500W median of 24.0 kg), requires checking roof load capacity
  • In the top 79% for efficiency among all TOPCon panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 490 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.64 % Weak Segment median 22.52%
Vmpp · Impp 37.99 V · 12.90 A Operating point at max power
Voc · Isc 45.33 V · 13.79 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2094×1134×35 mm · 2.37 m² of roof
Weight 26.3 kg Typical Typical · median 24.0 kg
Cells 132 · TOPCon Monocrystalline
Coefficient Pmax -0.350 %/°C Weak bottom 2% of its segment
Coefficient Voc · Isc -0.320 · 0.050 %/°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
-0.350 %/°C against a segment median of -0.290
-

Alternatives

All Resun Solar panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Resun Solar RS8H-M-490 490 W 20.64% -0.350 26.3 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, lighter, +4.4 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg Cooler, lighter, +4.2 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg Cooler, lighter, +4.1 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Cooler, lighter, +3.9 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg Cooler, lighter, +3.9 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg Cooler, lighter, +3.9 pp
RS8H-M-480 480 W 20.21% -0.350 26.3 kg -10 W, -0.4 pp
RS8H-M-485 485 W 20.42% -0.350 26.3 kg -0.2 pp
RS8H-M-495 495 W 20.85% -0.350 26.3 kg +0.2 pp
RS8H-M-500 500 W 21.06% -0.350 26.3 kg +10 W, +0.4 pp
RS8H-M-505 505 W 21.27% -0.350 26.3 kg +15 W, +0.6 pp
RS8H-M-510 510 W 21.48% -0.350 26.3 kg +20 W, +0.8 pp
RS8H-M-515 515 W 21.69% -0.350 26.3 kg +25 W, +1.1 pp
RS8H-M-BD 535 W 22.53% -0.300 25.0 kg +45 W, cooler, +1.9 pp
GKA120N-PRO-590W 590 W 23.82% -0.300 26.7 kg +100 W, cooler, +3.2 pp
GKA120N-PRO-585W 585 W 23.62% -0.300 26.7 kg +95 W, cooler, +3.0 pp

Found 397 panels of the same or similar size to this one, within ±10 mm. See them here Found 408 panels of the same or similar size to this one, within ±25 mm. See them here Found 425 panels of the same or similar size to this one, within ±50 mm. See them here Found 953 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 RS8H-M series panel?
RS8H-M series panels reach a maximum power output of up to 515 Wp. This is achieved by combining N-type TOPCon monocrystalline cells with a half-cut cell layout and a 9-11 busbar (BB) grid, which together reduce current losses and increase energy conversion efficiency.
How does TOPCon technology in the RS8H-M differ from standard PERC panels?
The N-type TOPCon cells used in RS8H-M feature lower power degradation over time and higher efficiency than older P-type PERC cells. An additional passivation layer reduces charge carrier recombination, resulting in higher energy yield, better performance at high temperatures, and a lower LCOE over the system's lifetime.
What warranty does Resun Solar offer on the RS8H-M panels?
The manufacturer provides a 15-year product warranty and a 30-year linear power output warranty. This means that even after three decades of operation, the panel should retain a significant portion of its original performance, making this series a solid long-term investment for commercial and industrial customers.
Are RS8H-M panels suitable for harsh climate conditions, such as coastal installations?
Yes, RS8H-M modules have certified mechanical resistance to wind and snow loads and are resistant to elevated salt mist and ammonia concentrations. This makes them suitable for both coastal areas and locations near agricultural facilities, where standard panels could otherwise corrode more quickly.
Is the RS8H-M a bifacial panel that generates power from its rear side?
No, the RS8H-M series is a monofacial panel, designed to generate power only from its front side. Investors seeking additional energy yield from ground reflection, such as ground-mount installations on light-colored surfaces, should consider alternative bifacial series from the manufacturer's lineup.
What does PID resistance mean for RS8H-M panels and why does it matter?
PID (Potential Induced Degradation) is a power loss phenomenon caused by voltage potential differences within a system, especially common in large installations with high string voltages. The RS8H-M's high PID resistance limits this effect, ensuring more stable energy production throughout the panel's lifetime and reducing the risk of unexpected performance drops.
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