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Resun Solar RS8V-M-DG-420
Resun Solar Brand review

RS8V-M-DG-420

420 Wp TOPCon Bifacial
ComparePV verdict

Middle of its segment, heavy for its output

Rank 10,246 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)
23.8
Weak · 1.8 kg above median
Warranty (yrs)
30
Typical · median 30 yrs

The RS8V-M-DG series consists of bifacial, double-glass modules engineered for installations where long-term energy yield stability and resilience under harsh operating conditions matter most. The panels use N-type TOPCon cells with half-cut technology and multi busbar interconnection, which reduces internal power losses and improves the module's resistance to microcracks and busbar breakage. Thanks to a double tempered glass layer with high light transmittance and an anti-reflective coating, the series delivers improved performance in low-light conditions, translating into higher real-world energy harvest on cloudy days and during morning or evening hours. The modules are PID-resistant, limiting power degradation over time and contributing to a lower LCOE for the installation. The construction is certified for high wind and heavy snow load resistance, as well as exposure to salt mist and ammonia, making it well suited for both coastal and agricultural installations. The RETIE version meets the requirements of the Colombian market. This is a solution for investors and installers seeking durable, high-performance panels for commercial and industrial projects, where a predictable return on investment over a 30-year linear power warranty is a key priority.

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 56.7 51.4 Weak · bottom 16% 10,801
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, agrivoltaic and shaded-installations.

Not ideal for

Weight-limited structures, roofs where every square metre has to count and tight roof space.

Watch-outs
56.7 kg per kWp

Bottom 16% of the TOPCon 400-450 W segment, against a median of 51.4.

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
  • At 21.5% efficiency, this panel is on par with typical TOPCon 400-450W modules
  • Power density of 215.1 W/m² is 5.1 W/m² below TOPCon 400-450W median (220.2 W/m²) - needs more roof space
  • Temperature coefficient of -0.30%/°C matches the TOPCon 400-450W median
  • At 23.8 kg, this panel is 1.8 kg heavier than the TOPCon 400-450W median (22.0 kg) - more demanding for installation crews
  • Ranked #7894 out of 14005 panels for efficiency in the database

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 31.85 V · 13.19 A Operating point at max power
Voc · Isc 38.30 V · 14.00 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 23.8 kg Weak Weak · 1.8 kg above median
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 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 420 Wp appear here. The rest cover the whole series.

0.5% Annual Degradation Over 30 Years (Linear Power Warranty) 0.5% Annual Degradation Over 30 Years (Linear Power 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-DG-420 420 W 21.51% -0.300 23.8 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, lighter, +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 Hotter, lighter, -0.8 pp
RS8V-M-410W 410 W 21.00% -0.350 22.0 kg Hotter, lighter, -0.5 pp
RS8V-M-415W 415 W 21.25% -0.350 22.0 kg Hotter, lighter, -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
How does N-TOPCon cell technology in the RS8V-M-DG panels differ from classic PERC cells?
N-TOPCon cells use an additional passivation layer that reduces electron recombination and increases both voltage and module efficiency compared to PERC. In practice this means higher power output from the same panel surface area, lower annual degradation, and better performance in high temperatures. For investors, this translates into higher energy yield and a lower LCOE over the system's operating life.
Do the bifacial RS8V-M-DG panels require special mounting?
Yes, to fully exploit dual-sided energy generation, panels are best mounted on racking that elevates them above the surface, such as flat-roof structures or ground-mounted trackers with a light or reflective surface underneath. Standard pitched-roof installation is also possible, but rear-side gain will be limited due to reduced clearance and light reflection.
What warranty does Resun Solar offer on the RS8V-M-DG series, and what does it cover?
The manufacturer provides a 15-year product warranty covering material and workmanship defects, plus a 30-year linear power warranty. This means a gradual, predictable power degradation curve spread over three decades, allowing investors to precisely plan ROI — an important factor for commercial projects financed through loans or leasing.
Are RS8V-M-DG modules resistant to PID, and what does that mean in practice?
Yes, the series is certified PID-resistant, meaning it resists potential-induced degradation, which in unprotected panels can cause power losses of over ten percent within the first few years of operation. PID resistance keeps RS8V-M-DG modules performing stably throughout their service life, which is especially important in large installations with high system voltage across module strings.
Are RS8V-M-DG panels suitable for coastal or agricultural installations?
Yes, the double-glass construction is certified for resistance to salt mist and ammonia exposure, making it suitable for both coastal installations and agricultural sites, such as those near livestock barns or manure storage. The panels also carry certifications for high wind load and heavy snow load resistance, increasing their versatility in demanding climates.
What is the maximum power output of a single RS8V-M-DG panel?
Panels in the RS8V-M-DG series reach a maximum power output of up to 440 Wp. The combination of N-TOPCon half-cut cells with multi-busbar interconnection reduces internal losses and delivers high module efficiency while maintaining resistance to microcracks, which matters during transport and installation on large rooftop and ground-mounted systems.
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