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Resun Solar Brand review

RSM-100P-EX

100 Wp Polycrystalline
ComparePV verdict

Warranty pick, weak in heat

Rank 13,836 of 14,005
Compare panels Datasheet PDF
Power (Wp)
100
Weak · bottom 17%
Efficiency (%)
14.70
Typical · median 15.70%
Density (Wp/m²)
146.3
Typical · median 156.3
Temp (%/°C)
-0.390
Weak · bottom 16%
Weight (kg)
7.0
Typical · median 11.2 kg
Warranty (yrs)
30
Strong · top 16%

The RSM-100P-EX series consists of compact 100W polycrystalline modules designed for small on-grid installations, mobile systems, and applications where predictable output matters within limited mounting space. The panels feature an anti-reflective, hydrophobic coating that improves light absorption and reduces dust buildup on the surface, helping the module maintain high efficiency without frequent cleaning. Built on 36 cells with 5 busbars, the construction delivers stable electrical parameters, and the manufacturer guarantees a positive power output tolerance of 0/+5W, removing the risk of underestimating actual energy yield. The series delivers strong performance in low-light conditions, translating into real energy gains during mornings, evenings, and overcast days. A reinforced anodized aluminum frame and 3.2mm tempered glass provide resistance to high wind and snow loads, making the panels suitable for demanding climates, including coastal, desert, and lakeside environments. An additional advantage is the 30-year linear power warranty with an annual degradation rate of just 0.5%, contributing to a lower LCOE over the full lifetime of the installation.

Ranking

223 panels in the 0-200 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 14.70% 15.70% Typical 13,858
Power density 146.3 156.3 Typical 13,842
Temperature coefficient -0.390 -0.370 Weak · bottom 16% 13,579
Weight per kWp 70.0 72.0 Typical 13,406
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

1 positive · 1 caution
Best for

Off-grid.

Not ideal for

Hot climates.

Strengths
30 year performance warranty

Top 16% of the 0-200 W band, against a median of 25 yrs.

Watch-outs
-0.390 %/°C temperature coefficient

Bottom 16% of the 0-200 W band, against a median of -0.370.

Notes from the database
  • Efficiency of 14.7% is 7.1pp below the database median (21.8%)
  • 146.3 W/m² power density is 71.8 W/m² below database median (218.1 W/m²) - requires larger installation area
  • At -0.39%/°C, loses 0.09pp more power per degree than database median (-0.30%/°C)
  • 7.0 kg weight - 19.5 kg lighter than database median (26.5 kg), reducing installation effort
  • #13858 for efficiency, #13579 for temperature performance out of 14005 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 100 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 14.70 % Typical Segment median 15.70%
Vmpp · Impp 18.92 V · 5.29 A Operating point at max power
Voc · Isc 22.70 V · 5.78 A Sizes the string length
Max system voltage 1000 V Longer strings than 1000 V modules
Dimensions 1020×670×30 mm · 0.68 m² of roof
Weight 7.0 kg Typical Typical · median 11.2 kg
Cells 36 Polycrystalline
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 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 -0.370
-

Alternatives

All Resun Solar panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Resun Solar RSM-100P-EX 100 W 14.70% -0.390 7.0 kg You are here
WS-135 /12V 135 W 15.87% -0.386 13.0 kg Heavier, +1.2 pp, -20 yr warranty
WS-110 /12V 110 W 15.75% -0.386 9.0 kg Heavier, +1.1 pp, -20 yr warranty
RSM080P 80 W 15.50% -0.390 5.7 kg -20 W, lighter, +0.8 pp
WS-130 /12V 130 W 15.29% -0.386 13.0 kg +30 W, heavier, -20 yr warranty
RS6E-150P 150 W 15.20% -0.390 - +50 W, +0.5 pp
GKA182M150W 150 W 23.00% - 9.0 kg +50 W, heavier, +8.3 pp
GKA182M160W 160 W 23.00% - 9.0 kg +60 W, heavier, +8.3 pp
SE5-150M 150 W 18.94% -0.350 8.2 kg +50 W, +4.2 pp, -5 yr warranty
LKS-5M-115 115 W 17.20% - 6.8 kg +15 W, +2.5 pp
DLXN-M10-100W 100 W 17.00% -0.410 5.8 kg Hotter, lighter, +2.3 pp
DLXN-M10-100W 100 W 17.00% -0.410 5.8 kg Hotter, +2.3 pp, -20 yr warranty
LKS-5M-110 110 W 16.50% - 6.8 kg +10 W, +1.8 pp
RT120WM 120 W 15.90% -0.230 6.8 kg +20 W, cooler, +1.2 pp

Found 1 panel of the same or similar size to this one, within ±10 mm. See them here Found 17 panels of the same or similar size to this one, within ±25 mm. See them here Found 17 panels of the same or similar size to this one, within ±50 mm. See them here Found 23 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What installations is the Resun Solar RSM-100P-EX 100W panel suitable for?
The RSM-100P-EX panel is primarily designed for small on-grid installations, mobile systems (RVs, boats, trailers), and off-grid applications with limited mounting space, such as garage roofs, carports, or measurement stations. Its compact size and 100W power rating allow easy system scaling by combining multiple modules where predictable performance is needed on a small footprint.
What does the positive power tolerance of 0/+5W mean for RSM-100P panels?
A power tolerance of 0/+5W guarantees that the actual output of the delivered panel is never lower than the rated 100W, and may even be up to 5W higher. This gives installers confidence that a system design based on nominal power won't underperform in practice, eliminating the risk of underestimated energy yield and simplifying inverter and cabling selection.
What warranty do Resun Solar RSM-100P panels come with, and how does power degrade over time?
The manufacturer provides a 12-year product warranty along with a 30-year linear power warranty, with annual degradation as low as 0.5%. This means the panel should retain a significant portion of its original output even after 30 years of operation, directly lowering LCOE and improving the long-term profitability of the investment.
Do RSM-100P panels require frequent cleaning from dust and debris?
Not under normal conditions. The anti-reflective, hydrophobic coating on the glass surface reduces dust accumulation and helps rainwater run off more easily, naturally self-cleaning the panel. As a result, the module maintains high efficiency for longer, and cleaning is only needed occasionally, especially in dusty regions.
Can RSM-100P panels withstand strong wind loads and heavy snow?
Yes, the reinforced anodized aluminum frame combined with 3.2 mm tempered glass gives the panel high mechanical resistance to wind and snow loads. This makes the module well-suited for demanding climates, including coastal areas, waterfront locations, and desert environments where extreme weather conditions are common.
Does the RSM-100P panel perform well on cloudy days or in low-light conditions?
Yes, the RSM-100P series is engineered for strong low-irradiance performance, delivering real energy gains during morning and evening hours as well as on overcast days. This is a key advantage in temperate climates where full sun isn't available all day, ensuring the system still generates meaningful output under suboptimal conditions.
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