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Resun Solar RS6K-335M
Resun Solar Brand review

RS6K-335M

335 Wp Monocrystalline
ComparePV verdict

Warranty pick, no clear weak spot

Rank 12,667 of 14,005
Compare panels Datasheet PDF
Power (Wp)
335
Weak · bottom 17%
Efficiency (%)
19.85
Typical · median 20.46%
Density (Wp/m²)
198.5
Typical · median 204.1
Temp (%/°C)
-0.340
Typical · median -0.340
Weight (kg)
19.0
Typical · median 21.4 kg
Warranty (yrs)
30
Strong · top 22%

The RS6K-M Full Black series consists of monocrystalline photovoltaic modules designed with both residential rooftop aesthetics and installation reliability in mind. These panels combine half-cut technology with multi-busbar cells, reducing internal power loss and lowering the risk of microcracks and busbar breakage, which significantly extends the module's service life. By splitting cells in half, the panel maintains strong resistance to hot-spot effects caused by partial shading, such as from chimneys, antennas, or fallen leaves, making it a solid choice for roofs with irregular sun exposure. The fully black frame and black backsheet give the module a uniform, sleek appearance that blends seamlessly with modern architecture, a feature favored by homeowners who care about the visual impact of their installation. The construction is PID-free, ensuring stable performance over the long term. The panels hold CE, TÜV, IEC 61215, IEC 61730, and VDE certifications, confirming compliance with international quality and safety standards. The RS6K-M Full Black is well suited both for pitched-roof installations and smaller systems with limited space, where aesthetics matter just as much as consistent energy output, even under challenging sunlight conditions.

Ranking

3,392 panels in the 235-435 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 19.85% 20.46% Typical 12,403
Power density 198.5 204.1 Typical 12,373
Temperature coefficient -0.340 -0.340 Typical 8,778
Weight per kWp 56.7 55.3 Typical 10,811
Performance warranty 30 yrs 25 yrs Strong · top 22% 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

1 positive · 0 caution
Best for

Residential, shaded-installations and BIPV.

Strengths
30 year performance warranty

Top 22% of the 235-435 W band, against a median of 25 yrs.

Notes from the database
  • Efficiency of 19.9% is 2.0pp below the database median (21.8%)
  • Power density of 198.5 W/m² is 19.6 W/m² below database median (218.1 W/m²) - needs more roof space
  • Temperature coefficient of -0.34%/°C is 0.04pp worse than database median (-0.30%/°C) - higher losses in summer heat
  • Weight of 19.0 kg (7.5 kg below database median of 26.5 kg) allows easier transport and roof mounting
  • #12403 for efficiency, #8778 for temperature performance out of 14005 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 335 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 19.85 % Typical Segment median 20.46%
Vmpp · Impp 34.00 V · 9.87 A Operating point at max power
Voc · Isc 41.50 V · 10.36 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1684×1002×35 mm · 1.69 m² of roof
Weight 19.0 kg Typical Typical · median 21.4 kg
Cells 120 Monocrystalline
Coefficient Pmax -0.340 %/°C Typical median -0.340 of its segment
Coefficient Voc · Isc -0.320 · 0.050 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 30 years Strong top 22% · median 25 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
-0.340 %/°C against a segment median of -0.340
-

Alternatives

All Resun Solar panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Resun Solar RS6K-335M 335 W 19.85% -0.340 19.0 kg You are here
NS-300MH-72 300 W 23.32% -0.290 12.5 kg Cooler, lighter, +3.5 pp
NS-300MH-72 300 W 23.32% -0.290 12.5 kg Cooler, lighter, +3.5 pp
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, +3.3 pp, -5 yr warranty
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, +3.3 pp, -5 yr warranty
GKA182M285W 285 W 23.00% - 10.8 kg -50 W, lighter, +3.1 pp
GKA182M300W 300 W 23.00% - 16.2 kg -35 W, lighter, +3.1 pp
GKA210M320W 320 W 23.00% - 16.2 kg -15 W, lighter, +3.1 pp
GKA210M340W 340 W 23.00% - 16.2 kg Lighter, +3.1 pp
GKA210M360W 360 W 23.00% - 16.2 kg +25 W, lighter, +3.1 pp
GKA210M380W (1/4*4*38) 380 W 23.00% - 17.1 kg +45 W, lighter, +3.1 pp
RS6K-325M 325 W 19.26% -0.340 19.0 kg -10 W, -0.6 pp
RS6K-330M 330 W 19.56% -0.340 19.0 kg -0.3 pp
RS6K-340M 340 W 20.15% -0.340 19.0 kg +0.3 pp
JT440SYK(B) 440 W 22.90% -0.240 23.0 kg +105 W, cooler, +3.0 pp
JT435SYk(B) 435 W 22.70% -0.240 23.0 kg +100 W, cooler, +2.8 pp
SPR-MAX3-400-COM 400 W 22.60% -0.270 19.0 kg Cooler, +2.8 pp, +10 yr warranty

Found 108 panels of the same or similar size to this one, within ±10 mm. See them here Found 218 panels of the same or similar size to this one, within ±25 mm. See them here Found 455 panels of the same or similar size to this one, within ±50 mm. See them here Found 799 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
Are Resun Solar RS6K-M Full Black panels suitable for a sloped residential roof?
Yes, the RS6K-M Full Black series is designed for residential prosumer installations on sloped roofs. The all-black frame and black backsheet give a uniform, aesthetic look without visible grid lines, which matters on roofs visible from the street. The half-cut construction also handles partial shading from chimneys or antennas well, a common issue on sloped roofs.
How does the half-cut technology in RS6K-M Full Black differ from standard full-cell panels?
In half-cut technology, cells are cut in half and wired into two independent circuits. This reduces the current flowing through each cell, lowering resistive losses and improving efficiency. It also means that under partial shading, only half the module shuts down instead of the whole panel, limiting power loss and reducing the risk of hot-spot damage in the shaded area.
What warranty comes with RS6K-M Full Black panels and what does it cover?
Resun Solar provides a 12-year product warranty covering material and workmanship defects, plus a 30-year power output warranty guaranteeing a defined performance level over that period. This matches the standard offered by leading manufacturers and gives investors confidence in the long-term return on their installation.
What is the maximum power output of the RS6K-M Full Black panel, and how many are needed for a 5 kW system?
Panels in the RS6K-M Full Black series reach up to 340 Wp. For a roughly 5 kW system, you would need approximately 14-15 modules, depending on the chosen inverter and system losses. The exact number should be confirmed with an installer based on available roof space and energy needs.
Is the RS6K-M Full Black a bifacial panel?
No, the RS6K-M Full Black series is a monofacial monocrystalline panel, not designed to generate energy from reflected light on the rear side. It targets residential rooftop installations, where bifacial gains are typically limited anyway due to lack of clearance beneath the module.
Are RS6K-M Full Black panels resistant to PID degradation and microcracks?
Yes, the modules are built with PID-free technology, meaning they are protected against potential-induced degradation and maintain stable performance over their operating lifetime. The half-cut, multi-busbar cell design further reduces the risk of microcracks and busbar interruption, improving durability under harsh weather conditions.
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