--- title: "Canadian Solar CS3K-320MS-AG Solar Panel: Specs & Datasheet | ComparePV" description: "Canadian Solar CS3K-320MS-AG solar panel. Specs: 19.30% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/canadian-solar-cs3k-320ms-ag" image: "https://comparepv.com/og/panel/canadian-solar-cs3k-320ms-ag.png" updated: 2026-09-11 --- # Canadian Solar CS3K-320MS-AG Warranty pick, heavy for its output 291 panels in the segment PERC 300-350 W ## Identity - **Manufacturer:** Canadian Solar - **Model:** CS3K-320MS-AG - **Series:** KuDymond CS3K-MS-AG - **Rated power:** 320 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 300-350 W (291 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 320 W | 325 W | Typical | | | Module efficiency | 19.30% | 19.00% | Typical | 12,889 | | Power density | 192.6 | 190.0 | Typical | 12,905 | | Temperature coefficient | -0.360 | -0.360 | Typical | 12,425 | | Weight (kg) | 22.5 kg | 19.0 kg | Weak - bottom 15% | | | Performance warranty | 30 yrs | 25 yrs | Strong - top 16% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 19.30% | 19.00% | Typical | 12,889 | | Power density | 192.6 | 190.0 | Typical | 12,905 | | Temperature coefficient | -0.360 | -0.360 | Typical | 12,425 | | Weight per kWp | 70.3 | 60.3 | Weak - bottom 15% | 13,543 | | Performance warranty | 30 yrs | 25 yrs | Strong - top 16% | 21 | ### Strengths - **30 year performance warranty** - Top 16% of the PERC 300-350 W segment, against a median of 25 yrs. ### Watch out for - **70.3 kg per kWp** - Bottom 15% of the PERC 300-350 W segment, against a median of 60.3. - **Best for:** Residential, commercial, cold-climate, hot-climate and shaded-installations. - **Not ideal for:** Weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 320 W - **Efficiency:** 19.30 % - **Voltage at Pmax (Vmp):** 33.30 V - **Current at Pmax (Imp):** 9.61 A - **Open-circuit voltage (Voc):** 40.10 V - **Short-circuit current (Isc):** 10.14 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.360 %/degC - **Temperature coefficient of Voc:** -0.290 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 42 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 120 ### Physical - **Length:** 1675 mm - **Width:** 992 mm - **Thickness:** 35 mm - **Weight:** 22.5 kg - **Area:** 1.66 m2 - **Power density:** 192.6 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12889 of 14129 | | Power density | 12905 of 14129 | | Temperature coefficient | 12425 of 14129 | | Weight | 13543 of 14129 | | Warranty | 21 of 14129 | ## Pros - **Established Tier-1 manufacturer** - Canadian Solar is a bankable Tier-1 manufacturer headquartered in Canada, operating since 2001, which lowers financial risk for investors and eases access to project bank financing. - **High snow and wind load resistance** - KuDymond CS3K-MS-AG modules achieve snow loads up to 6000 Pa (heavy snow load variants up to 8100 Pa), well above the industry standard of 5400 Pa, making them a strong choice for roofs in regions with harsh winters. - **Low power temperature coefficient** - The Pmax temperature coefficient is -0.36%/°C, limiting output loss on hot days and delivering higher real-world annual yield compared to PERC modules with coefficients closer to -0.40%/°C. - **30-year linear power warranty** - The manufacturer backs the series with a 30-year linear power warranty, which in 2019-2021 (production period) exceeded the then-standard 25-year warranty offered by most Tier-1 competitors. - **Take-e-way cell interconnection technology** - Take-e-way cell interconnection (available in MBB and 5BB variants) reduces inter-cell connection power losses and the impact of microcracks on performance, improving durability during transport and installation. ## Cons - **Production discontinued since 2021** - The KuDymond CS3K-MS-AG series was discontinued (released 2019, end-of-life 2021), meaning limited availability of service and replacement parts, and difficulty sourcing identical modules for system expansion. - **Efficiency trails top-tier competitors** - Efficiency up to 20.2% is comparable to SunLink LUXMAX (20.16%) but falls behind current top-tier N-type TOPCon/HJT modules reaching 21-22%, a natural result of the older PERC technology from the 2019-2021 period. - **No bifacial technology** - The modules lack dual-sided generation (is\_bifacial: false), forgoing the additional 5-15% yield potential available with competing bifacial modules on reflective surfaces or in ground-mount installations. ## About this series The KuDymond CS3K-MS-AG series consists of monocrystalline PERC modules engineered to withstand extreme weather conditions while delivering consistent energy yield throughout the system's lifetime. Built with Take-e-way cell interconnection technology, available in MBB and 5BB busbar configurations, the panels feature **low power loss in cell connections** and reduced sensitivity to micro-cracks, resulting in greater durability during transport and installation. The series stands out for its **high structural resistance to snow and wind loads**, making it a solid choice for installations in harsh climates, including roofs exposed to heavy winter loads. A low temperature coefficient combined with a reduced NMOT allows the modules to maintain **stable performance on hot days**, limiting the typical output drop at elevated operating temperatures. Another advantage is **improved partial shading tolerance**, which matters for irregular roof layouts or sites near shade-casting obstacles. The manufacturer backs the series with a **30-year linear power warranty and a 12-year product warranty**, adding an extra layer of investment security for both residential rooftop systems and larger commercial ground-mount installations. ## Notable figures - Efficiency of 19.3% matches the \*\*PERC 0-400W\*\* median - Power density of 192.6 W/m² matches the \*\*PERC 0-400W\*\* median - Temperature coefficient of -0.36%/°C matches the \*\*PERC 0-400W\*\* median - Weight of 22.5 kg is 2.0 kg above \*\*PERC 0-400W\*\* median (20.5 kg) - verify structural support - Ranked #12889 out of 14129 panels for efficiency in the database ## Questions ### Are Canadian Solar KuDymond CS3K-MS-AG panels still available for purchase? The KuDymond CS3K-MS-AG series has been discontinued by Canadian Solar and replaced by newer, higher-power models. Units may still be found through distributors as remaining stock, though in limited quantities. Before buying, check the manufacturing date and confirm the manufacturer's warranty still applies to that specific batch of modules. ### What is the maximum power output of a KuDymond CS3K-MS-AG panel? Modules in this series reach up to 335 Wp. This is a typical rating for monocrystalline PERC panels of standard dimensions, well suited for both residential rooftop installations and smaller commercial systems where power-to-area ratio matters. ### Are KuDymond CS3K-MS-AG panels suitable for roofs exposed to heavy snow loads? Yes, the series is engineered for high mechanical resistance to snow and wind loads. A reinforced frame combined with Take-e-way cell-connection technology reduces the risk of microcracks under heavy mechanical stress, making these panels a solid choice for harsh-climate regions and roofs subject to significant winter snow accumulation. ### What is the difference between the MBB and 5BB variants of the KuDymond CS3K-MS-AG? The MBB (multi-busbar) variant uses more thin busbars than the traditional 5BB design, reducing resistive losses, improving current collection from the cell, and limiting the impact of microcracks on power output. In practice, MBB panels offer slightly higher efficiency and durability, while the 5BB version is a cheaper, proven option with comparable reliability. ### How do KuDymond CS3K-MS-AG panels perform on hot days? Thanks to a low power temperature coefficient and a reduced NMOT rating, these panels lose less output than standard modules during high operating temperatures. This translates into more stable energy generation in summer, which matters especially on poorly ventilated roofs where module temperatures can rise significantly. ### What warranty applies to KuDymond CS3K-MS-AG panels, and does it still hold now that the series is discontinued? Canadian Solar backs the series with a 12-year product warranty and a 30-year linear power warranty. Discontinuation does not affect warranty validity for already installed panels - as a Tier 1 manufacturer headquartered in Canada, the company continues to honor claims for discontinued series under the original warranty terms. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Canadian_Solar-Datasheet-KuDymond_CS3K-MS-AG_EN-aa8512890e67.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar NS-300MH-72](https://comparepv.com/panel/ja-solar-ns-300mh-72) | 300 W | Cooler, lighter, +4.0 pp | | [PolyCrown Solar Tech NS-300MH-72](https://comparepv.com/panel/polycrown-solar-tech-ns-300mh-72) | 300 W | Cooler, lighter, +4.0 pp | | [Heckert Solar ZEUS 1.2 FullBlack 280W](https://comparepv.com/panel/heckert-solar-zeus-1-2-fullblack-280w) | 280 W | Cooler, lighter, +4.0 pp | | [JA Solar NS-330MH-80](https://comparepv.com/panel/ja-solar-ns-330mh-80) | 330 W | Cooler, lighter, +3.8 pp | | [PolyCrown Solar Tech NS-330MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-330mh-80) | 330 W | Cooler, lighter, +3.8 pp | | [Heckert Solar ZEUS 3.2 285WP FullBlack](https://comparepv.com/panel/heckert-solar-zeus-3-2-285wp-fullblack) | 285 W | Cooler, lighter, +3.8 pp | | [Gamko New Energy GKA182M285W](https://comparepv.com/panel/gamko-new-energy-gka182m285w) | 285 W | -35 W, lighter, +3.7 pp | | [Gamko New Energy GKA182M270W](https://comparepv.com/panel/gamko-new-energy-gka182m270w) | 270 W | -50 W, lighter, +3.7 pp | | [Gamko New Energy GKA182M300W](https://comparepv.com/panel/gamko-new-energy-gka182m300w) | 300 W | -20 W, lighter, +3.7 pp | | [Canadian Solar CS3K-295P-AG](https://comparepv.com/panel/canadian-solar-cs3k-295p-ag) | 295 W | -25 W, -1.5 pp | | [Canadian Solar CS3K-300MS](https://comparepv.com/panel/canadian-solar-cs3k-300ms) | 300 W | Lighter, -1.2 pp, -5 yr warranty | | [Canadian Solar CS3K-305MS](https://comparepv.com/panel/canadian-solar-cs3k-305ms) | 305 W | Lighter, -0.9 pp, -5 yr warranty | | [Canadian Solar CS3K-310MS](https://comparepv.com/panel/canadian-solar-cs3k-310ms) | 310 W | Lighter, -0.6 pp, -5 yr warranty | | [Maxeon SPR-MAX3-400-COM](https://comparepv.com/panel/maxeon-spr-max3-400-com) | 400 W | Cooler, +3.3 pp, +10 yr warranty | | [Lina Energy LEPV 400](https://comparepv.com/panel/lina-energy-lepv-400) | 400 W | +80 W, cooler, +3.0 pp | | [Phono Solar NS-360MH-60](https://comparepv.com/panel/phono-solar-ns-360mh-60) | 360 W | Cooler, lighter, +2.8 pp | --- Source: https://comparepv.com/panel/canadian-solar-cs3k-320ms-ag Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.