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Resun Solar Brand review

RS8V-M-425W FULL BLACK

425 Wp TOPCon
ComparePV verdict

Strong in heat, no clear weak spot

Rank 9,910 of 14,005
Compare panels Datasheet PDF
Power (Wp)
425
Typical for its class
Efficiency (%)
21.76
Typical · median 22.00%
Density (Wp/m²)
217.6
Typical · median 220.2
Temp (%/°C)
-0.250
Strong · top 1%
Weight (kg)
21.5
Typical · median 22.0 kg
Warranty (yrs)
30
Typical · median 30 yrs

The Resun Solar RS8V-M FULL BLACK (N-type TOPCon) series are modules designed for maximum aesthetics and stable performance in real roof conditions. The full, uniform finish creates a cohesive surface with the covering - it looks particularly good on modern homes and buildings with high visual requirements. The use of N-type TOPCon solar cells helps to minimize typical yield losses over time and supports high efficiency even when solar irradiance is not ideal.

In practice, this series solves the problem of limited mounting area - thanks to its refined design, it is easier to achieve a strong installation even on a smaller roof. Multi-busbar technology reduces internal losses and improves performance under partial shading, and the full black finish is an advantage over standard modules with light-colored components. For investors, the longer linear warranty is also important, which makes it easier to plan profitability over the years. This is a good choice for homes, small businesses, and premium installations, where appearance, durability, and predictable yield are important.

Ranking

1,218 panels in the segment TOPCon 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.76% 22.00% Typical 7,285
Power density 217.6 220.2 Typical 7,172
Temperature coefficient -0.250 -0.290 Strong · top 1% 456
Weight per kWp 50.6 51.4 Typical 3,991
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

1 positive · 0 caution
Best for

Residential, commercial and shaded-installations.

Strengths
-0.250 %/°C temperature coefficient

Top 1% of the TOPCon 400-450 W segment, against a median of -0.290. Ranked 456th in the whole database.

Notes from the database
  • Efficiency of 21.8% matches the TOPCon 400-450W median
  • At 217.6 W/m² power density, roof space requirements are typical for TOPCon 400-450W panels
  • -0.25%/°C temperature coefficient (median: -0.29%/°C) - retains ~2% more power at high temperatures
  • #7285 for efficiency, #456 for temperature performance out of 14005 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 425 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.76 % Typical Segment median 22.00%
Vmpp · Impp 31.94 V · 13.31 A Operating point at max power
Voc · Isc 37.71 V · 14.19 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 -0.250 %/°C Strong top 1% of its segment
Coefficient Voc · Isc -0.300 · 0.045 %/°C
NOCT 42 °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
End-of-warranty output 87.4 % Equals 371 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 425 Wp appear here. The rest cover the whole series.

Linear Performance Warranty Linear Performance Warranty 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
-0.250 %/°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-425W FULL BLACK 425 W 21.76% -0.250 21.5 kg You are here
SPR-MAX7-475 475 W 24.00% -0.270 21.1 kg +50 W, +2.2 pp, +10 yr warranty
JST-EDMH-(445-465)W-TD (465W class) 465 W 23.81% -0.300 20.5 kg +40 W, hotter, +2.0 pp
JAT54S40-475/LR 475 W 23.80% -0.260 19.3 kg +50 W, lighter, +2.0 pp
TWMNH-48HW475 475 W 23.80% -0.280 23.7 kg +50 W, hotter, +2.0 pp
CHSM48RN(DG)/F-BH-475 475 W 23.80% -0.290 24.5 kg +50 W, hotter, +2.0 pp
AIKO-A475-MCE54Mw 475 W 23.80% -0.260 21.0 kg +50 W, hotter, +2.0 pp
AIKO-A475-MAH54Mw 475 W 23.80% -0.260 21.5 kg +50 W, hotter, +2.0 pp
RS8V-M-400 400 W 20.48% -0.350 22.0 kg -25 W, hotter, -1.3 pp
RS8V-M-405 405 W 20.74% -0.350 22.0 kg -20 W, hotter, -1.0 pp
RS8V-M-410W 410 W 21.00% -0.350 22.0 kg -15 W, hotter, -0.8 pp
RS8V-M-415W 415 W 21.25% -0.350 22.0 kg -10 W, hotter, -0.5 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +85 W, heavier, +3.2 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +70 W, hotter, +3.0 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +80 W, heavier, +2.9 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +65 W, hotter, +2.7 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +75 W, heavier, +2.7 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 warranty does the Resun Solar RS8V-M FULL BLACK TOPCon panel come with?
The RS8V-M FULL BLACK series comes with a 15-year product warranty covering manufacturing defects and a 30-year linear power warranty guaranteeing at least 87.4% of nominal power output by the end of the warranty period. This is among the longer standard warranties available for residential PV modules, making long-term ROI planning more reliable.
How do the Resun Solar RS8V-M FULL BLACK panels perform in winter and low-light conditions?
Very well. N-type TOPCon cells feature a temperature coefficient of Pmax at -0.30%/°C, meaning lower power losses during hot summer days compared to older PERC technology. In low-irradiance conditions — winter months or overcast days — N-type TOPCon modules generate proportionally more energy than P-type modules, thanks to their higher base efficiency of up to 22.28%.
How is the RS8V-M FULL BLACK different from standard black-frame solar panels?
Standard black-frame panels still have a white or transparent backsheet, which breaks the visual uniformity of the roof surface. The RS8V-M FULL BLACK features a fully black backsheet, frame, and busbar grid for a seamless, uniform appearance. Beyond aesthetics, its N-type TOPCon cells deliver higher efficiency and slower long-term degradation compared to most PERC-based full-black modules.
How many Resun RS8V-M 435W panels are needed to build a 5 kWp system on a small roof?
You need approximately 12 panels to reach a 5.22 kWp system. Each module measures 1722×1134 mm, so 12 units require roughly 23.4 m² of roof area before accounting for mounting clearances. With module efficiency up to 22.28%, the RS8V-M FULL BLACK allows you to maximize output on roofs with limited available surface.
Is TOPCon technology in the RS8V-M FULL BLACK worth the premium over PERC?
For installations limited by roof area or with high aesthetic requirements, yes. TOPCon cells offer higher efficiency, a lower temperature coefficient, and lower susceptibility to PID compared to PERC. Over a 25–30-year system lifetime, the higher energy yield can offset the higher upfront module cost, especially when net-metering tariffs or electricity purchase prices are favorable.
Are the Resun Solar RS8V-M FULL BLACK panels rated for high wind and snow loads?
Yes. The RS8V-M FULL BLACK series is certified for wind load resistance up to 2400 Pa and snow load up to 5400 Pa. This makes the panels suitable for Central European climates where heavy snowfall and strong wind gusts are common seasonal stresses on rooftop installations. The modules also carry certification for salt mist and ammonia resistance.
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