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Resun Solar RS8V-M TOPCON-420W
Resun Solar Brand review

RS8V-M TOPCON-420W

420 Wp TOPCon
ComparePV verdict

Middle of its segment, needs the roof space

Rank 10,547 of 14,005
Compare panels Datasheet PDF
Power (Wp)
420
Weak · bottom 16%
Efficiency (%)
21.51
Weak · bottom 20%
Density (Wp/m²)
215.1
Weak · bottom 19%
Temp (%/°C)
-0.300
Typical · median -0.290
Weight (kg)
21.5
Typical · median 22.0 kg
Warranty (yrs)
30
Typical · median 30 yrs

The RS8V-M TOPCON series consists of modules built on monocrystalline TOPCon half-cut cells, paired with multi-busbar technology that lowers internal power loss and improves resistance to microcracks and broken busbars. Splitting the cells into half-cut segments makes the panel significantly more resilient to partial shading, reducing the risk of hot-spots and preventing losses in array output. The sturdy construction with high-transmittance tempered glass ensures stable performance even under weak sunlight, translating into higher energy yield on cloudy days or during early morning hours. The module also stands out for its high mechanical strength, certified for heavy wind and snow loads, along with resistance to salt mist and ammonia, making it a solid choice for installations in demanding environments, including agricultural and coastal sites. Advanced PID resistance limits power degradation over time, supporting a lower cost of energy across the system's lifetime. This series is aimed at both commercial investors and rooftop projects that value reliability, a long-term linear performance warranty, and predictable output over decades of operation.

Ranking

1,218 panels in the segment TOPCon 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.51% 22.00% Weak · bottom 20% 7,894
Power density 215.1 220.2 Weak · bottom 19% 7,882
Temperature coefficient -0.300 -0.290 Typical 6,093
Weight per kWp 51.2 51.4 Typical 4,567
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 · 2 caution
Best for

Residential, commercial, shaded-installations and agrivoltaic.

Not ideal for

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

Watch-outs
215.1 watts per square metre

Bottom 19% of the TOPCon 400-450 W segment, against a median of 220.2.

21.51% module efficiency

Bottom 20% of the TOPCon 400-450 W segment, against a median of 22.00%.

Notes from the database
  • Efficiency of 21.5% matches the TOPCon 400-450W median
  • At 215.1 W/m², this panel generates 5.1 W/m² less per unit area than TOPCon 400-450W median (220.2 W/m²)
  • At -0.30%/°C, hot weather performance is typical for TOPCon 400-450W panels
  • In the top 56% for efficiency among all TOPCon panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 420 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.51 % Weak Segment median 22.00%
Vmpp · Impp 31.80 V · 13.21 A Operating point at max power
Voc · Isc 38.00 V · 14.07 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1722×1134×30 mm · 1.95 m² of roof
Weight 21.5 kg Typical Typical · median 22.0 kg
Cells 108 · TOPCon Monocrystalline
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 12 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 367 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

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 420 Wp appear here. The rest cover the whole series.

Linear Performance Warranty Linear Performance Warranty Whole series I-V Curves of PV Module I-V Curves of PV Module Whole series P-V Curves of PV Module P-V Curves of PV Module 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 RS8V-M TOPCON-420W 420 W 21.51% -0.300 21.5 kg You are here
JST-EDMH-(445-465)W-TD (465W class) 465 W 23.81% -0.300 20.5 kg +45 W, lighter, +2.3 pp
LX-465M/182R-96+ GG 465 W 23.80% -0.260 23.5 kg +45 W, cooler, +2.3 pp
SPR-MAX7-470 470 W 23.70% -0.270 21.1 kg +50 W, +2.2 pp, +10 yr warranty
AIKO-A470-MAH54Mb 470 W 23.60% -0.260 21.5 kg +50 W, cooler, +2.1 pp
AIKO-A460-MAH54Mb 460 W 23.60% -0.290 20.5 kg +40 W, cooler, +2.1 pp
HSM-BD54-LA470 470 W 23.60% -0.260 21.5 kg +50 W, cooler, +2.1 pp
RS8V-M-400 400 W 20.48% -0.350 22.0 kg -20 W, hotter, -1.0 pp
RS8V-M-405 405 W 20.74% -0.350 22.0 kg -15 W, hotter, -0.8 pp
RS8V-M-410W 410 W 21.00% -0.350 22.0 kg -10 W, hotter, -0.5 pp
RS8V-M-415W 415 W 21.25% -0.350 22.0 kg Hotter, -0.3 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +90 W, cooler, +3.5 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +75 W, cooler, +3.3 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +85 W, cooler, +3.2 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +70 W, cooler, +3.0 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +80 W, cooler, +3.0 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg +80 W, cooler, +3.0 pp

Found 1783 panels of the same or similar size to this one, within ±10 mm. See them here Found 1914 panels of the same or similar size to this one, within ±25 mm. See them here Found 3392 panels of the same or similar size to this one, within ±50 mm. See them here Found 3970 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 RS8V-M TOPCon panel, and is it competitive for a monocrystalline module?
The RS8V-M TOPCon series reaches a maximum power output of up to 435 Wp, thanks to monocrystalline TOPCon half-cut cells combined with multi-busbar technology. This is a competitive figure among modules of similar format, and the reduced internal power losses translate into higher real-world energy yield compared to older PERC-based technologies.
Are Resun Solar RS8V-M TOPCon panels suitable for coastal or agricultural installations?
Yes, the RS8V-M TOPCon series is certified for salt mist and ammonia resistance, making it a solid choice for coastal installations and agricultural sites where standard panels tend to degrade faster. The reinforced construction also provides high resistance to wind and snow loads, suited to demanding environmental conditions.
What warranty comes with the RS8V-M TOPCon panels?
Resun Solar offers a 12-year product warranty along with a 30-year linear power warranty, which is standard for modern TOPCon modules. This long performance warranty ensures a predictable power decline over time and a lower levelized cost of energy across the system's entire lifecycle.
How does TOPCon technology in the RS8V-M differ from cheaper PERC panels?
The TOPCon cells used in the RS8V-M series have higher efficiency and lower recombination losses than PERC cells, resulting in better energy yield, especially under low irradiance and higher temperatures. The half-cut and multi-busbar design further increases resistance to microcracks and partial shading, reducing the risk of hot spots.
Are RS8V-M TOPCon panels resistant to PID degradation?
Yes, this series features advanced PID (Potential Induced Degradation) resistance, limiting power loss over time, which is especially important in large installations with higher system voltages. This means investors can expect more stable energy production throughout the warranty period.
Is the RS8V-M TOPCon series a mono-facial or bifacial module?
RS8V-M TOPCon panels are mono-facial modules, not bifacial. This means they generate power only from the front side, which simplifies mounting on typical rooftop and ground-mount structures, though they don't capture reflected light from the rear side as bifacial panels do.
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