--- title: "CSUN CSUN595-156M 595W Solar Panel - Specs & Review | ComparePV" description: "CSUN CSUN595-156M 595W solar panel. Specs: 21.23% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/csun-csun595-156m" updated: 2026-09-11 --- # CSUN CSUN595-156M Middle of its segment, weak in heat 1,017 panels in the segment TOPCon 550-600 W ## Identity - **Manufacturer:** CSUN - **Model:** CSUN595-156M - **Series:** Mars Series - **Rated power:** 595 W - **Cell technology:** TOPCon ## How it compares Compared against segment TOPCon 550-600 W (1017 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 595 W | 580 W | Strong - top 5% | | | 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 (kg) | 31.5 kg | 31.2 kg | Typical | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 5% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | 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 | ### Watch out for - **-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. - **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. ## Specification ### Electrical - **Rated power (Pmax):** 595 W - **Efficiency:** 21.23 % - **Voltage at Pmax (Vmp):** 45.54 V - **Current at Pmax (Imp):** 13.07 A - **Open-circuit voltage (Voc):** 53.97 V - **Short-circuit current (Isc):** 13.97 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.360 %/degC - **Temperature coefficient of Voc:** -0.304 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 156 ### Physical - **Length:** 2465 mm - **Width:** 1134 mm - **Thickness:** 35 mm - **Weight:** 31.5 kg - **Area:** 2.80 m2 - **Power density:** 212.9 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 84.8 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.55 % - **Output after 30 years:** 488 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 9056 of 14005 | | Power density | 8601 of 14005 | | Temperature coefficient | 12345 of 14005 | | Weight | 6657 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **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. ## Cons - **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. ## About this series 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. ## Notable figures - 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 ## Questions ### 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. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/CSUN600-156M-182-48ef8ea295b2.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +50 W, cooler, +3.8 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, lighter, +3.6 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | Cooler, +3.6 pp, +5 yr warranty | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, lighter, +3.4 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | Cooler, +3.4 pp, +5 yr warranty | | [CSUN CSUN580-156M](https://comparepv.com/panel/csun-csun580-156m) | 580 W | -15 W, -0.5 pp | | [CSUN CSUN585-156M](https://comparepv.com/panel/csun-csun585-156m) | 585 W | -10 W, -0.4 pp | | [CSUN CSUN590-156M](https://comparepv.com/panel/csun-csun590-156m) | 590 W | Very close match | | [CSUN CSUN600-156M](https://comparepv.com/panel/csun-csun600-156m) | 600 W | Very close match | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +85 W, cooler, +4.0 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +80 W, cooler, +3.8 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +105 W, cooler, +3.8 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +100 W, cooler, +3.7 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +75 W, cooler, +3.6 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +75 W, cooler, +3.6 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | +75 W, cooler, +3.6 pp | --- Source: https://comparepv.com/panel/csun-csun595-156m Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.