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Resun Solar Brand review

RS6C270P

270 Wp Polycrystalline
ComparePV verdict

Warranty pick, weak in heat

Rank 13,502 of 14,005
Compare panels Datasheet PDF
Power (Wp)
270
Weak · bottom 21%
Efficiency (%)
16.70
Typical · median 18.09%
Density (Wp/m²)
166.0
Weak · bottom 25%
Temp (%/°C)
-0.390
Weak · bottom 20%
Weight (kg)
18.0
Typical · median 19.0 kg
Warranty (yrs)
30
Strong · top 18%

The RS6C-P series is a proven solution for grid-connected installations, built on classic 156x156 mm polycrystalline cells arranged 60 per module (6x10), split by five busbars for better current collection and lower resistive losses. The module stands out with its anti-reflective, hydrophobic coating, which improves light absorption and reduces surface dust buildup, resulting in more stable output even during morning and evening diffuse light or on cloudy days. The design was engineered for harsh operating conditions - coastal areas, deserts and lakeside sites - thanks to high resistance to wind and snow loads. The panel carries PID-free certification, eliminating the risk of potential-induced degradation and ensuring long-term power stability. An additional advantage is the linear power warranty with a very low annual efficiency drop, making the RS6C-P a solid choice for investors expecting predictable returns from their installation over many years. It is a fitting option for anyone looking for proven, robust poly technology without compromising on durability or build quality.

Ranking

1,154 panels in the 170-370 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 16.70% 18.09% Typical 13,522
Power density 166.0 180.4 Weak · bottom 25% 13,531
Temperature coefficient -0.390 -0.360 Weak · bottom 20% 13,579
Weight per kWp 66.7 63.3 Typical 13,171
Performance warranty 30 yrs 25 yrs Strong · top 18% 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

1 positive · 2 caution
Best for

Residential.

Not ideal for

Hot climates and roofs where every square metre has to count.

Strengths
30 year performance warranty

Top 18% of the 170-370 W band, against a median of 25 yrs.

Watch-outs
-0.390 %/°C temperature coefficient

Bottom 20% of the 170-370 W band, against a median of -0.360.

166.0 watts per square metre

Bottom 25% of the 170-370 W band, against a median of 180.4.

Notes from the database
  • At 16.7% efficiency, this panel is 5.1pp below the database median of 21.8%
  • At 166.0 W/m², this panel generates 52.1 W/m² less per unit area than database median (218.1 W/m²)
  • -0.39%/°C temperature coefficient - 0.09pp worse than database median (-0.30%/°C), expect higher hot weather losses
  • Weight of 18.0 kg (8.5 kg below database median of 26.5 kg) allows easier transport and roof mounting
  • Ranked #13522 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 270 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 16.70 % Typical Segment median 18.09%
Vmpp · Impp 30.72 V · 8.79 A Operating point at max power
Voc · Isc 37.90 V · 9.19 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1640×992×30 mm · 1.63 m² of roof
Weight 18.0 kg Typical Typical · median 19.0 kg
Cells 60 Polycrystalline
Coefficient Pmax -0.390 %/°C Weak bottom 20% 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 18% · 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
-0.390 %/°C against a segment median of -0.360
-

Alternatives

All Resun Solar panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Resun Solar RS6C270P 270 W 16.70% -0.390 18.0 kg You are here
CS3K-320P 320 W 19.30% -0.360 18.5 kg +50 W, +2.6 pp, -5 yr warranty
CS3K-315P 315 W 19.00% -0.360 18.5 kg +45 W, +2.3 pp, -5 yr warranty
LNSK-320M 320 W 18.90% -0.360 21.0 kg +50 W, +2.2 pp, -5 yr warranty
CS3K-310P-AG 310 W 18.70% -0.360 22.5 kg +40 W, heavier, +2.0 pp
RL310HP-120 310 W 18.60% -0.390 18.5 kg +40 W, +1.9 pp
LNSK-315P 315 W 18.60% -0.360 21.0 kg +45 W, +1.9 pp, -5 yr warranty
CS3K-310PB-AG 310 W 18.40% -0.360 22.3 kg +40 W, heavier, +1.7 pp
SPR-MAX3-400-COM 400 W 22.60% -0.270 19.0 kg +130 W, cooler, +5.9 pp
LEPV 400 400 W 22.31% -0.290 20.0 kg +130 W, cooler, +5.6 pp
NS-360MH-60 360 W 22.12% -0.290 17.0 kg +90 W, cooler, +5.4 pp
NS-360MH-60 360 W 22.12% -0.290 17.0 kg +90 W, cooler, +5.4 pp
SPR-MAX3-390-COM 390 W 22.10% -0.270 19.0 kg +120 W, cooler, +5.4 pp
MB_TG120ByB_390 390 W 21.80% -0.259 24.4 kg +120 W, cooler, +5.1 pp
EVPV380 380 W 21.70% -0.260 19.5 kg +110 W, cooler, +5.0 pp
LG375Q1C-V5 375 W 21.70% -0.300 17.5 kg +105 W, cooler, +5.0 pp
NS-350MH-60 350 W 21.51% -0.290 17.0 kg +80 W, cooler, +4.8 pp

Found 182 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 379 panels of the same or similar size to this one, within ±50 mm. See them here Found 472 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
Is the Resun Solar RS6C-P 270 Wp panel still available for purchase?
The RS6C-P series has been discontinued and is no longer manufactured by Resun Solar. It may still be found through distributors clearing remaining stock or on the secondary market. Anyone planning to expand an existing installation built on this module should expect limited availability and consider comparable replacement models.
What warranty comes with Resun Solar RS6C-P panels?
The manufacturer backs the RS6C-P series with a 12-year product warranty and a 30-year linear power warranty. This means the output degradation of the 156x156 mm poly cells is contractually limited over that entire period, giving investors a predictable and stable energy yield from the 270 Wp module across three decades of operation.
What do the five busbars in the RS6C-P panel provide, and is this better than standard 3BB?
Five busbars (5BB) conduct current from the cell more efficiently than older 3BB layouts, reducing resistive losses and improving module efficiency. The shorter path electrons travel to the metallization grid lowers the impact of micro-cracks on output, making the RS6C-P more stable even with minor cell-level mechanical damage.
Is the RS6C-P panel suitable for harsh environments such as coastal installations?
Yes, the RS6C-P was engineered for demanding locations - coastal areas, desert regions, and sites near bodies of water. The module offers high resistance to wind and snow loads, and its anti-reflective, hydrophobic coating reduces soiling buildup, which matters under heavy moisture and salt exposure.
What does the PID-free certification on the RS6C-P mean and why does it matter?
PID-free means the RS6C-P panel resists potential-induced degradation, a phenomenon where voltage differences between cells and the grounded frame cause power loss. This certification helps the module maintain stable performance throughout its lifetime, even in large grid-tied arrays with high string voltages.
Is the RS6C-P a bifacial panel, and how does that affect its use?
No, the RS6C-P series is a monofacial panel built on classic polycrystalline cells. It generates energy only from light hitting its front surface, making it best suited for standard rooftop and ground-mount installations that don't rely on reflected light from the ground surface.
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