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CSUN CSUN595-156M
CSUN Brand review

CSUN595-156M

595 Wp TOPCon
ComparePV verdict

Middle of its segment, weak in heat

Rank 6,448 of 14,005
Compare panels Datasheet PDF
Power (Wp)
595
Strong · top 5%
Efficiency (%)
21.23
Weak · bottom 3%
Density (Wp/m²)
212.9
Weak · bottom 4%
Temp (%/°C)
-0.360
Weak · bottom 1%
Weight (kg)
31.5
Typical · median 31.2 kg
Warranty (yrs)
25
Weak · bottom 5%

The Mars series from CSUN is a line of monocrystalline modules built on half-cut PERC technology, designed to maximize energy yield while minimizing losses caused by shading effects and resistance. Splitting cells in half combined with a multi-busbar layout allows for more efficient current distribution and reduces the risk of microcracks, resulting in higher long-term reliability for the installation. Panels in this series stand out for their reinforced mechanical construction, backed by certifications for high wind and snow load resistance, making them well suited for both mountainous conditions and roofs exposed to strong gusts. Another key advantage is strong performance under low irradiance, which matters in a climate with frequent cloud cover and shorter winter days. The Mars series is aimed at both residential installation investors and larger commercial projects, where the ratio of generated power to roof area matters most. Thanks to its low temperature coefficient, the modules maintain stable output even on hot summer days, limiting the performance drops typical of cheaper solutions. It's a solid choice for installers seeking a proven balance between price, durability, and real-world energy yield in European conditions.

Ranking

1,017 panels in the segment TOPCon 550-600 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.23% 22.44% Weak · bottom 3% 9,056
Power density 212.9 224.4 Weak · bottom 4% 8,601
Temperature coefficient -0.360 -0.290 Weak · bottom 1% 12,345
Weight per kWp 52.9 53.8 Typical 6,657
Performance warranty 25 yrs 30 yrs Weak · bottom 5% 9,798
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

5 positive · 6 caution
Best for

Commercial, utility-scale, shaded-installations and hot-climate.

Not ideal for

Hot climates, tight roof space and roofs where every square metre has to count.

Watch-outs
-0.360 %/°C temperature coefficient

Bottom 1% of the TOPCon 550-600 W segment, against a median of -0.290. Ranked 12,345th in the whole database.

21.23% module efficiency

Bottom 3% of the TOPCon 550-600 W segment, against a median of 22.44%. Ranked 9,056th in the whole database.

212.9 watts per square metre

Bottom 4% of the TOPCon 550-600 W segment, against a median of 224.4. Ranked 8,601st in the whole database.

What owners get
Half-cut cells reduce microcrack risk

Half-cut cell design combined with a multi-busbar layout lowers resistive losses and microcrack risk, resulting in more stable energy output over the module's lifetime.

Reinforced frame for heavy loads

Certified resistance to high snow and wind loads makes the Mars Series well suited for mountain rooftops and locations exposed to strong gusts, where cheaper frames tend to fail sooner.

Wide 445-670 Wp power range

19 variants within one series allow the module to be matched to both small residential installations and large commercial projects without switching suppliers.

Solid low-light performance

The PERC cell characteristics used in this series provide relatively stable output under diffuse light, which matters in the Polish climate with frequent cloud cover and short winter days.

Low power temperature coefficient

Limited power loss at high module temperatures helps maintain steady output during hot summer days, reducing the seasonal drop typical of cheaper constructions.

Trade-offs
Efficiency trails the top of the segment

Peak efficiency of 21.6% and 670 Wp max power fall behind competitors such as AIKO Comet 2U (670 Wp, 24.8%), meaning more module area is needed for comparable output at the same rated power.

Warranty below current market trend

The 12-year product / 25-year linear power warranty is standard for PERC technology but notably shorter than the 15/30-year terms now common among N-type TOPCon and HJT module manufacturers.

PERC technology losing ground to N-type

The series is built on PERC dating from 2021, while several tier-1 manufacturers (including peer comparable AIKO) have shifted to N-type cells with higher efficiency and lower LID degradation, which may affect the series' long-term competitiveness.

Notes from the database
  • Module efficiency of 21.2% is 1.2pp below average for TOPCon 550-600W panels (median: 22.4%)
  • At 212.9 W/m², this panel generates 11.5 W/m² less per unit area than TOPCon 550-600W median (224.4 W/m²)
  • Temperature coefficient of -0.36%/°C is 0.07pp worse than TOPCon 550-600W median (-0.29%/°C) - higher losses in summer heat
  • Ranked #9056 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 595 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.23 % Weak Segment median 22.44%
Vmpp · Impp 45.54 V · 13.07 A Operating point at max power
Voc · Isc 53.97 V · 13.97 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2465×1134×35 mm · 2.80 m² of roof
Weight 31.5 kg Typical Typical · median 31.2 kg
Cells 156 · TOPCon Monocrystalline
Coefficient Pmax -0.360 %/°C Weak bottom 1% of its segment
Coefficient Voc · Isc -0.304 · 0.050 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 25 years Weak bottom 5% · median 30 yrs
End-of-warranty output 84.8 % Equals 488 W guaranteed
Degradation 2.00 → 0.55 % 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
-0.360 %/°C against a segment median of -0.290
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
CSUN CSUN595-156M 595 W 21.23% -0.360 31.5 kg You are here
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg +50 W, cooler, +3.8 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg Cooler, lighter, +3.6 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg Cooler, +3.6 pp, +5 yr warranty
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg Cooler, lighter, +3.4 pp
AIKO-A635-MAE72Mw 635 W 24.60% -0.260 27.0 kg Cooler, +3.4 pp, +5 yr warranty
CSUN580-156M 580 W 20.69% -0.360 31.5 kg -15 W, -0.5 pp
CSUN585-156M 585 W 20.87% -0.360 31.5 kg -10 W, -0.4 pp
CSUN590-156M 590 W 21.05% -0.360 31.5 kg Very close match
CSUN600-156M 600 W 21.40% -0.360 31.5 kg Very close match
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +85 W, cooler, +4.0 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg +80 W, cooler, +3.8 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +105 W, cooler, +3.8 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg +100 W, cooler, +3.7 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg +75 W, cooler, +3.6 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg +75 W, cooler, +3.6 pp
JKM650-670N-66QL6-BDV (670W class) 670 W 24.80% -0.260 32.5 kg +75 W, cooler, +3.6 pp

Found 616 panels of the same or similar size to this one, within ±10 mm. See them here Found 616 panels of the same or similar size to this one, within ±25 mm. See them here Found 616 panels of the same or similar size to this one, within ±50 mm. See them here Found 1813 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What is the maximum power output of CSUN Mars Series panels?
The Mars Series panels reach a maximum power output of up to 670 Wp. That is a high rating for a single module, meaning fewer panels and less roof area are needed to reach a given system size. For commercial installations, this reduces mounting structure and cabling costs per installed kilowatt.
How does half-cut PERC technology in the Mars Series differ from standard panels?
In half-cut technology, cells are cut in half, reducing current losses and internal resistance across the module. Combined with the PERC layer, which reflects light back into the cell, the panel generates more energy from the same surface area. It also reduces sensitivity to partial shading, such as from a chimney or antenna on the roof.
What warranty comes with CSUN Mars Series panels?
The manufacturer offers a 12-year product warranty and a 25-year power performance warranty. This means the panel should maintain its guaranteed energy output level for a quarter century, which is a strong standard for good-quality monocrystalline modules currently available on the market.
Are Mars Series panels suitable for roofs exposed to heavy wind and snow loads?
Yes, Mars Series modules feature a reinforced mechanical structure, certified for high wind and snow load resistance. They work well both on mountain roofs, where heavy snow accumulates in winter, and on buildings exposed to strong gusts, such as tall structures or open terrain.
Do CSUN Mars panels perform well in cloudy weather and low sunlight?
Yes, one advantage of this series is good performance under low irradiance, which matters in climates with frequent cloud cover and shorter winter days. The panels generate energy more efficiently than cheaper alternatives even under diffuse light, not just under full sun.
Do Mars modules lose efficiency on hot summer days?
The panels have a low temperature coefficient, keeping output stable even at high module temperatures in summer. This matters because standard modules can lose over ten percent of their power at 60-70°C, while the Mars Series limits these losses, preserving real-world energy yield.
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