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Resun Solar RS6C-320M
Resun Solar Brand review

RS6C-320M

320 Wp PERC
ComparePV verdict

Warranty pick, weak in heat

Rank 12,905 of 14,129
Compare panels Datasheet PDF
Power (Wp)
320
Typical for its class
Efficiency (%)
19.67
Strong · top 23%
Density (Wp/m²)
196.7
Strong · top 22%
Temp (%/°C)
-0.390
Weak · bottom 16%
Weight (kg)
19.0
Typical · median 19.0 kg
Warranty (yrs)
30
Strong · top 16%

The RS6C-M series consists of classic, proven monocrystalline PERC modules in a 60-cell configuration, designed for residential installations and smaller on-grid systems where predictability and reliability matter without a premium price tag. The panels use 5-busbar cells together with an anti-reflective, hydrophobic coating that improves light absorption and limits dust buildup, helping the module maintain high output longer between cleanings. A key advantage is the guaranteed positive power tolerance of 0 to +5W, removing the risk of receiving an underperforming unit relative to the system design. The frame and glass construction enables operation in demanding climatic conditions - high wind and snow load ratings make the series suitable for coastal installations as well as mountain or heavy-snowfall regions. Another benefit is stable performance in low-light conditions, meaning mornings, evenings, and overcast days, which translates into real gains in annual energy yield. The whole series is backed by a 30-year linear power warranty, resulting in low annual degradation and a favorable LCOE over the system's lifetime. It is a solid choice for investors who value reliability, straightforward installation, and a predictable return on investment.

Ranking

291 panels in the segment PERC 300-350 W
Metric This panel Median Position in segment Overall rank
Module efficiency 19.67% 19.00% Strong · top 23% 12,645
Power density 196.7 190.0 Strong · top 22% 12,614
Temperature coefficient -0.390 -0.360 Weak · bottom 16% 13,659
Weight per kWp 59.4 60.3 Typical 12,208
Performance warranty 30 yrs 25 yrs Strong · top 16% 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

8 positive · 4 caution
Best for

Owners who value a long output guarantee, roofs where every square metre counts and small roofs that need every watt.

Not ideal for

Hot climates.

Strengths
30 year performance warranty

Top 16% of the PERC 300-350 W segment, against a median of 25 yrs.

196.7 watts per square metre

Top 22% of the PERC 300-350 W segment, against a median of 190.0.

19.67% module efficiency

Top 23% of the PERC 300-350 W segment, against a median of 19.00%.

Watch-outs
-0.390 %/°C temperature coefficient

Bottom 16% of the PERC 300-350 W segment, against a median of -0.360.

What owners get
Guaranteed positive power tolerance

A 0/+5W power tolerance eliminates the risk of receiving an underperforming unit relative to system design assumptions, an advantage over the standard ±3% tolerance common among mainstream-segment manufacturers.

30-year linear power warranty

The series is backed by a 30-year linear power warranty alongside a 12-year product warranty, matching comparable series in the segment (e.g., Sun Earth AGRI Mono) and translating into low annual degradation and a favorable LCOE over the system's lifetime.

High wind and snow load resistance

Reinforced frame and glass construction supports operation in demanding climatic conditions, making the RS6C-M series suitable for coastal, mountain, and high-snowfall installations.

Anti-reflective, hydrophobic coating

5-busbar cells combined with an anti-reflective and hydrophobic coating improve light absorption and reduce soil accumulation, sustaining higher yield between cleaning cycles.

Competitive efficiency up to 19.67%

Maximum efficiency of 19.67% at up to 320 Wp is on par with the best comparable series in this power/efficiency bracket, such as SP Enerji (19.67%) and Philadelphia Solar PS-M60(BF) (19.6%).

Trade-offs
No bifacial variant available

Unlike the comparable Philadelphia Solar PS-M60(BF) series, RS6C-M modules are monofacial only, limiting additional energy yield from rear-side albedo gain, which matters for ground-mount or high-reflectance installations.

Conventional full-cell 60-cell layout

The series uses standard full-cell 60-cell PERC construction, while some peers in this segment (e.g., Sun Earth AGRI Mono) have moved to half-cell technology, typically offering lower resistive losses and slightly better module mechanical stability.

No confirmed BNEF Tier 1 status

Resun Solar was not found on current BNEF Tier 1 lists (Q1-Q3 2026), which can matter for investors assessing project bankability under non-recourse debt financing.

Notes from the database
  • At 19.7% efficiency, this panel is on par with typical PERC 0-400W modules
  • Power density of 196.7 W/m² matches the PERC 0-400W median
  • -0.39%/°C temperature coefficient - 0.03pp worse than PERC 0-400W median (-0.36%/°C), expect higher hot weather losses
  • Weight of 19.0 kg (1.5 kg below PERC 0-400W median of 20.5 kg) allows easier transport and roof mounting
  • In the top 89% for efficiency among all PERC panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 320 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 19.67 % Strong Segment median 19.00%
Vmpp · Impp 33.80 V · 9.47 A Operating point at max power
Voc · Isc 40.94 V · 9.94 A Sizes the string length
Max system voltage 1000 V Longer strings than 1000 V modules
Dimensions 1640×992×35 mm · 1.63 m² of roof
Weight 19.0 kg Typical Typical · median 19.0 kg
Cells 60 · PERC Monocrystalline
Coefficient Pmax -0.390 %/°C Weak bottom 16% 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 16% · median 25 yrs
Degradation 1.80 → 0.50 % First year, then annual

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
-0.390 %/°C against a segment median of -0.360
-

Alternatives

All Resun Solar panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Resun Solar RS6C-320M 320 W 19.67% -0.390 19.0 kg You are here
NS-300MH-72 300 W 23.32% -0.290 12.5 kg Cooler, lighter, +3.6 pp
NS-300MH-72 300 W 23.32% -0.290 12.5 kg Cooler, lighter, +3.6 pp
ZEUS 1.2 FullBlack 280W 280 W 23.31% -0.260 14.3 kg Cooler, lighter, +3.6 pp
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, +3.5 pp, -5 yr warranty
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, +3.5 pp, -5 yr warranty
ZEUS 3.2 285WP FullBlack 285 W 23.14% -0.260 15.6 kg -35 W, cooler, +3.5 pp
GKA182M285W 285 W 23.00% - 10.8 kg -35 W, lighter, +3.3 pp
GKA182M270W 270 W 23.00% - 10.8 kg -50 W, lighter, +3.3 pp
GKA182M300W 300 W 23.00% - 16.2 kg -20 W, lighter, +3.3 pp
RS6C270P 270 W 16.60% -0.390 19.0 kg -50 W, -3.1 pp
RS6C-275P 275 W 16.80% -0.390 19.0 kg -45 W, -2.9 pp
RS6C-280P 280 W 17.10% -0.390 19.0 kg -40 W, -2.6 pp
RS6C-285P 285 W 17.40% -0.390 19.0 kg -35 W, -2.3 pp
RS6C-290P 290 W 17.83% -0.390 19.0 kg -30 W, -1.8 pp
RS6C-300M 300 W 18.44% -0.390 19.0 kg -20 W, -1.2 pp
RS6C-305M 305 W 18.74% -0.390 19.0 kg -15 W, -0.9 pp
SPR-MAX3-400-COM 400 W 22.60% -0.270 19.0 kg Cooler, +2.9 pp, +10 yr warranty

Found 191 panels of the same or similar size to this one, within ±10 mm. See them here Found 227 panels of the same or similar size to this one, within ±25 mm. See them here Found 394 panels of the same or similar size to this one, within ±50 mm. See them here Found 487 panels of the same or similar size to this one, within ±100 mm. See them here

About the RS6C-M series

6 answered

These answers cover the whole series. Where a figure differs, the specification above is this module's own.

What is the maximum power output of the Resun Solar RS6C-M series panels?
Modules in the RS6C-M series reach a maximum power output of up to 320 Wp. This is a typical value for 60-cell monocrystalline PERC panels, well suited for residential installations with moderate roof space where larger, higher-power panels won't fit.
What warranty does the Resun Solar RS6C-M series come with?
The manufacturer provides a 12-year product warranty along with a 30-year linear power warranty. This means low, predictable annual power degradation, resulting in stable energy yield and a favorable LCOE over the entire lifetime of the installation.
What does the 0-+5W power tolerance mean for RS6C-M panels and why does it matter?
A 0-+5W power tolerance guarantees the actual panel output is never below the rated label value, and may even exceed it. In practice, investors can be confident the purchased module won't underperform the system design assumptions, eliminating the risk of underestimated energy production.
Do RS6C-M panels perform well in low-light and cloudy conditions?
Yes, the PERC cells with 5 busbars used in the RS6C-M series deliver stable power output even under low irradiance, such as early morning, evening, and cloudy days. This results in higher annual energy yield compared to older cell technologies, particularly in regions with variable sunlight.
Are RS6C-M panels resistant to heavy snow and wind loads?
The frame and glass construction of the RS6C-M series is engineered to withstand demanding climate conditions, including high wind and snow loads. This makes the modules suitable both for mountainous regions with heavy snowfall and coastal areas exposed to strong winds.
Do RS6C-M panels have a coating that reduces dirt buildup, and how often do they need cleaning?
RS6C-M panels feature an anti-reflective and hydrophobic coating that improves light absorption and makes it harder for dust, pollen, and other contaminants to settle on the glass surface. This helps the module maintain high efficiency longer between cleanings, reducing maintenance frequency and costs for the installation.
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