--- title: "Canadian Solar CS3U-395P 395W Solar Panel - Specs & Review | ComparePV" description: "Canadian Solar CS3U-395P 395W solar panel. Specs: 19.90% efficiency, Polycrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/canadian-solar-cs3u-395p" updated: 2026-09-11 --- # Canadian Solar CS3U-395P Solid all-round for its segment 579 panels in the segment PERC 350-400 W ## Identity - **Manufacturer:** Canadian Solar - **Model:** CS3U-395P - **Series:** KuMax CS3U-P - **Rated power:** 395 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 350-400 W (579 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 395 W | 380 W | Strong - top 12% | | | Module efficiency | 19.90% | 19.90% | Typical | 12,331 | | Power density | 199.1 | 199.0 | Typical | 12,326 | | Temperature coefficient | -0.360 | -0.350 | Typical | 12,345 | | Weight (kg) | 22.5 kg | 21.4 kg | Typical | | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 19.90% | 19.90% | Typical | 12,331 | | Power density | 199.1 | 199.0 | Typical | 12,326 | | Temperature coefficient | -0.360 | -0.350 | Typical | 12,345 | | Weight per kWp | 57.0 | 55.8 | Typical | 10,956 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | - **Best for:** Residential and commercial. ## Specification ### Electrical - **Rated power (Pmax):** 395 W - **Efficiency:** 19.90 % - **Voltage at Pmax (Vmp):** 41.00 V - **Current at Pmax (Imp):** 9.64 A - **Open-circuit voltage (Voc):** 48.80 V - **Short-circuit current (Isc):** 10.24 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.360 %/degC - **Temperature coefficient of Voc:** -0.280 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 42 degC ### Cell and construction - **Cell type:** Polycrystalline - **Cell technology:** PERC - **Cell count:** 144 ### Physical - **Length:** 2000 mm - **Width:** 992 mm - **Thickness:** 35 mm - **Weight:** 22.5 kg - **Area:** 1.98 m2 - **Power density:** 199.1 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 25 years ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12331 of 14005 | | Power density | 12326 of 14005 | | Temperature coefficient | 12345 of 14005 | | Weight | 10956 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **PERC + half-cut cells** - PERC technology combined with half-cut cells reduces power loss under partial shading and lowers the risk of microcracks, translating into higher real-world energy yield under suboptimal irradiance conditions. - **Multi-busbar (MBB) structure** - MBB technology improves current collection from the cell and increases mechanical resistance to microcracks during transport and installation, which matters for ground-mount installations shipped over long distances. - **PID and LID resistance** - Certified resistance to potential-induced degradation (PID) and light-induced degradation (LID) limits power loss in the early years of operation, supporting the declared 25-year power warranty in the datasheet. - **Tier-1, bankable manufacturer** - Canadian Solar (founded 2001) appears in the BloombergNEF Tier 1 rankings (Q2 2026) with an annual manufacturing capacity of 61 GW, easing project financing based on this series even though it is now discontinued. - **Robust mechanical construction** - The reinforced frame and module construction allow installation in regions with heavy snow and wind loads, broadening the series' applicability across pitched-roof and ground-mount installations. ## Cons - **Production discontinued** - The KuMax CS3U-P series was manufactured from 2016 to 2021 and is no longer offered by the manufacturer. This means limited availability of identical modules for extending existing installations and potentially longer lead times for warranty service claims. - **Below-average efficiency for segment** - Efficiency of 19.2–19.9% trails newer competitors at the same 395 Wp power class — Meyer Burger Black reaches 21.5% and Waaree EDO PRO 19.83%. The 1.6–2.3 pp gap translates to lower energy yield per unit of roof area. - **Older polycrystalline technology** - The module uses polycrystalline PERC cells, while current segment leaders (e.g., HT-SAAE TOPCon, Meyer Burger HJT) have moved to monocrystalline N-type cells offering lower annual degradation and better high-temperature performance. - **12-year product warranty** - The standard 12-year product warranty is shorter than the extended 15–25 year warranties now offered by newer Tier-1 series — including some of Canadian Solar's own current lineup — which can affect the perceived residual value of the installation. ## About this series The Canadian Solar KuMax CS3U-P series consists of polycrystalline modules built on **PERC** technology combined with **half-cut cells**, which minimize power losses caused by partial shading and microcracks, extending the real-world lifespan of the installation. The use of a **multi-busbar (MBB) structure** improves current collection and reduces the risk of microcracks during transport and installation, resulting in higher reliability under demanding operating conditions. These panels stand out thanks to their **low temperature coefficient**, allowing them to lose less power on hot days and maintain stable output year-round, even in high-irradiance climates. The manufacturer also ensured **resistance to PID and LID**, limiting cell degradation over time and protecting the investment for years to come. This solution was designed for investors seeking a proven balance between price and quality, suitable for both rooftop installations and ground-mounted solar farms. The robust mechanical construction allows for installation in regions with heavy snow and wind loads, while Canadian Solar's global reputation adds further warranty security to the entire project. ## Notable figures - Efficiency of 19.9% matches the \*\*PERC 0-400W\*\* median - 199.1 W/m² power density - 4.7 W/m² more than \*\*PERC 0-400W\*\* median (194.4 W/m²), more power per roof area - 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 - In the top 88% for efficiency among all PERC panels ## Questions ### Is the Canadian Solar KuMax CS3U-P 395W still available for purchase? The KuMax CS3U-P series has been discontinued by Canadian Solar and replaced by newer TOPCon cell-based models. Units from this series may still be available through distributors as remaining stock, but it's worth checking current availability with your supplier before planning a larger installation, to avoid issues sourcing identical modules later. ### What warranty comes with the KuMax CS3U-P panels and what does it cover? Canadian Solar provides a 12-year product warranty covering material and workmanship defects, plus a 25-year linear power output warranty. The power warranty guarantees the panel still generates a defined percentage of its initial rated output after years of use, which is standard for Tier 1 manufacturers. ### How do the half-cut cells in the KuMax CS3U-P differ from standard full-size cells? Half-cut cells are cut in half, reducing resistive losses and limiting the impact of partial shading on overall panel output. In practice, shading of one section of the module (e.g., from a leaf or chimney) causes a smaller power drop than with traditional panels, and the design also reduces the risk of microcracks during transport and installation. ### Do KuMax CS3U-P panels perform well in hot summer conditions? Yes, the series features a low temperature coefficient of power, meaning less output loss on hot days compared to standard polycrystalline modules. This allows the panels to maintain more stable energy production during summer, when irradiance is highest but cell temperature also rises and naturally reduces efficiency. ### What is the maximum power output of the KuMax CS3U-P and what installations is it suited for? Modules in the KuMax CS3U-P series reach up to 395 Wp maximum power. Thanks to a robust mechanical frame, resistance to snow and wind loads, and PERC technology with half-cut cells, they work well in both residential rooftop installations and larger ground-mounted solar farms where cost-to-reliability ratio matters. ### Are KuMax CS3U-P panels resistant to PID and LID degradation? Yes, the manufacturer built in resistance to PID (Potential Induced Degradation) and LID (Light Induced Degradation), common causes of gradual output loss in solar panels during the first years of operation. Limiting these effects results in more predictable energy production and better long-term protection of the investment. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Canadian_Solar-Datasheet-KuMax_CS3U-P_High-Efficiency_EN-8eada6883278.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Goldi Solar GS10-B120-GF-445](https://comparepv.com/panel/goldi-solar-gs10-b120-gf-445) | 445 W | +50 W, cooler, +0.7 pp | | [Goldi Solar GS10-B120-GF-440](https://comparepv.com/panel/goldi-solar-gs10-b120-gf-440) | 440 W | +45 W, cooler, +0.4 pp | | [SunLink LNSU-410M](https://comparepv.com/panel/sunlink-lnsu-410m) | 410 W | +15 W, heavier, +0.4 pp | | [Goldi Solar GS10-B120-GF-435](https://comparepv.com/panel/goldi-solar-gs10-b120-gf-435) | 435 W | +40 W, cooler, heavier | | [SunLink LNSU-405M](https://comparepv.com/panel/sunlink-lnsu-405m) | 405 W | +10 W, heavier | | [SunLink LNSU-400M](https://comparepv.com/panel/sunlink-lnsu-400m) | 400 W | Heavier | | [Sunlike Solar LNSF-400M](https://comparepv.com/panel/sunlike-solar-lnsf-400m) | 400 W | Heavier | | [Canadian Solar CS3W-440PB-AG](https://comparepv.com/panel/canadian-solar-cs3w-440pb-ag) | 440 W | +45 W, heavier, +5 yr warranty | | [Canadian Solar CS3U-355P](https://comparepv.com/panel/canadian-solar-cs3u-355p) | 355 W | -40 W, -2.0 pp | | [Canadian Solar CS3U-360P](https://comparepv.com/panel/canadian-solar-cs3u-360p) | 360 W | -35 W, -1.7 pp | | [Canadian Solar CS3U-365P](https://comparepv.com/panel/canadian-solar-cs3u-365p) | 365 W | -30 W, -1.5 pp | | [Canadian Solar CS3U-370P](https://comparepv.com/panel/canadian-solar-cs3u-370p) | 370 W | -25 W, -1.2 pp | | [Canadian Solar CS3U-375P](https://comparepv.com/panel/canadian-solar-cs3u-375p) | 375 W | -20 W, -1.0 pp | | [Maxeon SPR-MAX7-475](https://comparepv.com/panel/maxeon-spr-max7-475) | 475 W | Cooler, +4.1 pp, +15 yr warranty | | [Maxeon SPR-MAX7-470](https://comparepv.com/panel/maxeon-spr-max7-470) | 470 W | Cooler, +3.8 pp, +15 yr warranty | | [Maxeon SPR-MAX7-465](https://comparepv.com/panel/maxeon-spr-max7-465) | 465 W | Cooler, +3.6 pp, +15 yr warranty | --- Source: https://comparepv.com/panel/canadian-solar-cs3u-395p Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.