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Resun Solar RS6K-M-340
Resun Solar Brand review

RS6K-M-340

340 Wp Monocrystalline
ComparePV verdict

Warranty pick, no clear weak spot

Rank 12,538 of 14,005
Compare panels Datasheet PDF
Power (Wp)
340
Weak · bottom 17%
Efficiency (%)
20.15
Typical · median 20.50%
Density (Wp/m²)
201.5
Typical · median 204.8
Temp (%/°C)
-0.340
Typical · median -0.340
Weight (kg)
19.0
Typical · median 21.5 kg
Warranty (yrs)
30
Strong · top 24%

The RS6K-M series consists of solar panels built with half-cut cell technology, which reduces internal power losses and increases energy conversion efficiency. By splitting the cells in half, the module gains significantly higher resistance to microcracks and busbar damage, directly translating into a longer installation lifespan and reduced failure risk under demanding operating conditions. The use of multi-busbar technology further improves current collection across the cell surface, minimizing resistance and thermal losses. Another key advantage of the RS6K-M series is improved resistance to the hot-spot effect caused by partial shading, allowing the panels to maintain stable performance even under uneven sunlight exposure, for example near trees, chimneys, or neighboring buildings. The black frame gives the modules an aesthetic, uniform appearance, ideal for rooftop installations with high visual requirements. The panels hold CE, TUV, IEC 61215, IEC 61730, VDE, and CEC certifications, with quality further backed by CHUBB Insurance Group coverage. The RS6K-M series works well in both residential and commercial installations where reliability-to-price ratio and stable long-term energy output matter most.

Ranking

3,730 panels in the 240-440 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 20.15% 20.50% Typical 12,074
Power density 201.5 204.8 Typical 12,048
Temperature coefficient -0.340 -0.340 Typical 8,778
Weight per kWp 55.9 55.0 Typical 10,244
Performance warranty 30 yrs 25 yrs Strong · top 24% 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
30 year performance warranty

Top 24% of the 240-440 W band, against a median of 25 yrs.

Notes from the database
  • Efficiency of 20.1% is 1.7pp below the database median (21.8%)
  • Power density of 201.5 W/m² is 16.6 W/m² below database median (218.1 W/m²) - needs more roof space
  • At -0.34%/°C, loses 0.04pp more power per degree than database median (-0.30%/°C)
  • 19.0 kg weight - 7.5 kg lighter than database median (26.5 kg), reducing installation effort
  • Ranked #12074 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 340 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.15 % Typical Segment median 20.50%
Vmpp · Impp 34.20 V · 9.96 A Operating point at max power
Voc · Isc 41.70 V · 10.55 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 21.5 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 24% · 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-M-340 340 W 20.15% -0.340 19.0 kg You are here
NS-300MH-72 300 W 23.32% -0.290 12.5 kg Cooler, lighter, +3.2 pp
NS-300MH-72 300 W 23.32% -0.290 12.5 kg Cooler, lighter, +3.2 pp
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, +3.0 pp, -5 yr warranty
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, +3.0 pp, -5 yr warranty
GKA182M300W 300 W 23.00% - 16.2 kg -40 W, lighter, +2.9 pp
GKA210M320W 320 W 23.00% - 16.2 kg -20 W, lighter, +2.9 pp
GKA210M340W 340 W 23.00% - 16.2 kg Lighter, +2.9 pp
GKA210M360W 360 W 23.00% - 16.2 kg +20 W, lighter, +2.9 pp
GKA210M380W (1/4*4*38) 380 W 23.00% - 17.1 kg +40 W, lighter, +2.9 pp
GKA210M380W (1/2*4*19) 380 W 23.00% - 17.1 kg +40 W, lighter, +2.9 pp
RS6K-325M 325 W 19.26% -0.340 19.0 kg -15 W, -0.9 pp
RS6K-330M 330 W 19.56% -0.340 19.0 kg -10 W, -0.6 pp
RS6K-335M 335 W 19.85% -0.340 19.0 kg -0.3 pp
JT440SYK(B) 440 W 22.90% -0.240 23.0 kg +100 W, cooler, +2.8 pp
JT435SYk(B) 435 W 22.70% -0.240 23.0 kg +95 W, cooler, +2.6 pp
SPR-MAX3-400-COM 400 W 22.60% -0.270 19.0 kg Cooler, +2.5 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 panels still available for purchase?
The RS6K-M series has been discontinued by Resun Solar and replaced by newer, higher-power models. Availability is now limited to remaining distributor stock. Check current stock levels with your supplier before planning a large installation, as sourcing identical panels for future system expansion may become difficult.
What warranty comes with RS6K-M panels and what does it cover?
The manufacturer provides a 12-year product warranty covering material and workmanship defects, plus a 30-year linear power output warranty guaranteeing sustained high efficiency over the module's operational life. The investment is further protected by insurance coverage from CHUBB Insurance Group, adding financial security for buyers.
How does half-cut technology in the RS6K-M differ from standard panels?
Half-cut technology splits cells in half, reducing current flow through each segment and lowering resistive and thermal losses. This gives the RS6K-M higher energy conversion efficiency and significantly greater resistance to microcracks and busbar damage, extending the module's real-world lifespan compared to traditional full-cell panels.
Do RS6K-M panels handle partial shading well, such as from a chimney or tree?
Yes, thanks to the half-cut design and enhanced hot-spot resistance, RS6K-M modules cope better with uneven sunlight. Partial shading on part of the panel causes a smaller drop in overall output than with conventional panels, which matters on roofs with obstructions like chimneys, antennas, or neighboring buildings.
What is the maximum power rating of the RS6K-M and what installations suit it best?
The maximum power rating in this series is 340 Wp. This makes it suitable for both smaller residential installations and larger commercial systems where price-to-reliability ratio matters. The black frame also gives the modules a clean, uniform look ideal for roofs with higher aesthetic requirements.
Is the RS6K-M a bifacial panel?
No, the RS6K-M series is a monofacial panel, generating power only from the front side. If additional energy gain from reflected light off the ground is a priority, such as in ground-mounted systems over light-colored gravel, consider Resun Solar's newer bifacial series instead of the RS6K-M.
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