--- title: "Canadian Solar CS3U-355PB-AG vs Canadian Solar CS3U-365PB-AG - Solar Panel Comparison | ComparePV" description: "Compare Canadian Solar CS3U-355PB-AG vs Canadian Solar CS3U-365PB-AG side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/canadian-solar-cs3u-355pb-ag/canadian-solar-cs3u-365pb-ag" image: "https://comparepv.com/og/compare/panels/canadian-solar-cs3u-355pb-ag/canadian-solar-cs3u-365pb-ag.png" updated: 2026-09-11 --- # Canadian Solar CS3U-355PB-AG vs Canadian Solar CS3U-365PB-AG 365PB-AG leads on the differences that matter The largest is module efficiency: 0.50 pp more efficient. 15 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Canadian Solar CS3U-355PB-AG](https://comparepv.com/panel/canadian-solar-cs3u-355pb-ag) | [Canadian Solar CS3U-365PB-AG](https://comparepv.com/panel/canadian-solar-cs3u-365pb-ag) | | Manufacturer | Canadian Solar | Canadian Solar | | Power | 355 Wp | 365 Wp | | Efficiency | 17.70 % | 18.20 % | | Technology | PERC | PERC | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 355PB-AG | 365PB-AG | Difference | | --- | --- | --- | --- | | Module efficiency | 17.70 % | 18.20 % | +0.50 pp for 365PB-AG | | Power density | 177.0 Wp/m² | 182.0 Wp/m² | +5.0 Wp/m² for 365PB-AG | | Rated power | 355 Wp | 365 Wp | +10 W for 365PB-AG | ## Every compared parameter | Parameter | 355PB-AG | 365PB-AG | | --- | --- | --- | | Rated power | 355 Wp | 365 Wp | | Module efficiency | 17.70 % | 18.20 % | | Power density | 177.0 Wp/m² | 182.0 Wp/m² | | Open-circuit voltage | 46.80 V | 47.20 V | | Voltage at max power | 39.40 V | 39.80 V | | Short-circuit current | 9.59 A | 9.75 A | | Current at max power | 9.02 A | 9.18 A | | Temperature coefficient | -0.360 %/°C | -0.360 %/°C | | Dimensions | 2022x992x30 mm | 2022x992x30 mm | | Module area | 2.006 m² | 2.006 m² | | Weight | 25.9 kg | 25.9 kg | | Weight per kWp | 73.0 kg/kWp | 71.0 kg/kWp | | Product warranty | 12 yrs | 12 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | - | - | | Cell technology | PERC | PERC | | Cell type | Polycrystalline | Polycrystalline | | Cell count | 144 | 144 | | Bifacial | Yes | Yes | ## Thirty-year yield A 1.0% first-year loss then 0.40% a year, assumed for both panels, at 1,200 kWh/kWp a year Same temp coeff. for both panels (-0.360 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other. - **Cumulative output, 355PB-AG:** 11,911 kWh - **Cumulative output, 365PB-AG:** 12,246 kWh - **Gap:** 335 kWh ## Output when hot | Condition | Cell temperature | 355PB-AG | 365PB-AG | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 355 W | 365 W | 100.0% of rated power | | Cool, bright day | 40 °C | 336 W | 345 W | 94.6% of rated power | | Typical summer roof | 55 °C | 317 W | 326 W | 89.2% of rated power | | Hot roof | 70 °C | 297 W | 306 W | 83.8% of rated power | ## Against the whole database | Measure | 355PB-AG | 365PB-AG | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #13,404 | #13,276 | 14,129 | 365PB-AG leads by 128 places | | Power density | #13,393 | #13,256 | 14,129 | 365PB-AG leads by 137 places | | Heat behaviour | #12,425 | #12,425 | 14,129 | Tied - the same position in the database | | Weight | #13,660 | #13,575 | 14,129 | 365PB-AG leads by 85 places | | Warranty | #21 | #21 | 14,129 | Tied - the same position in the database | | Overall | #13,146 | #13,010 | 14,129 | 365PB-AG leads by 136 places | ## Questions ### Which panel is better: Canadian Solar CS3U-355PB-AG or Canadian Solar CS3U-365PB-AG? According to our database: **Canadian Solar CS3U-365PB-AG** has higher module efficiency (**18.20%** vs **17.70%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Canadian Solar CS3U-355PB-AG and Canadian Solar CS3U-365PB-AG? **Canadian Solar CS3U-355PB-AG** has a module efficiency of **17.70%**, while **Canadian Solar CS3U-365PB-AG** is **18.20%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Canadian Solar CS3U-355PB-AG use vs Canadian Solar CS3U-365PB-AG? **Canadian Solar CS3U-355PB-AG** uses **PERC** cells; **Canadian Solar CS3U-365PB-AG** uses **PERC**. Modern **n-type** technologies (**TOPCon**, **HJT**, BC) typically deliver higher efficiency and lower degradation compared to older **PERC** (p-type) cells. ### What is the warranty on Canadian Solar CS3U-355PB-AG and Canadian Solar CS3U-365PB-AG? **Canadian Solar CS3U-355PB-AG** has a **30 years** power warranty; **Canadian Solar CS3U-365PB-AG** has a **30 years** power warranty. The power warranty guarantees a minimum percentage of rated output at the end of the warranty period (typically 80**-87%**). Product (materials) warranties are usually shorter. ### Are Canadian Solar CS3U-355PB-AG and Canadian Solar CS3U-365PB-AG bifacial panels? Both **Canadian Solar CS3U-355PB-AG** and **Canadian Solar CS3U-365PB-AG** are bifacial - they capture reflected light from the ground, which can add 5**-15%** more annual energy on ground-mount or elevated rooftop installations with a light surface beneath. ## Related comparisons - [Canadian Solar CS3U-355PB-AG vs Canadian Solar CS3U-385PB-AG](https://comparepv.com/compare/canadian-solar-cs3u-355pb-ag/canadian-solar-cs3u-385pb-ag) - 6 differences, the largest is module efficiency - [Canadian Solar CS3U-355PB-AG vs Canadian Solar CS3U-380PB-AG](https://comparepv.com/compare/canadian-solar-cs3u-355pb-ag/canadian-solar-cs3u-380pb-ag) - 6 differences, the largest is module efficiency - [Canadian Solar CS3U-355PB-AG vs Canadian Solar CS3U-375PB-AG](https://comparepv.com/compare/canadian-solar-cs3u-355pb-ag/canadian-solar-cs3u-375pb-ag) - 4 differences, the largest is module efficiency - [Canadian Solar CS3U-355PB-AG vs Canadian Solar CS3U-370PB-AG](https://comparepv.com/compare/canadian-solar-cs3u-355pb-ag/canadian-solar-cs3u-370pb-ag) - 4 differences, the largest is module efficiency - [Canadian Solar CS3U-355PB-AG vs Canadian Solar CS3U-360PB-AG](https://comparepv.com/compare/canadian-solar-cs3u-355pb-ag/canadian-solar-cs3u-360pb-ag) - One difference: module efficiency - [Canadian Solar CS3U-355PB-AG vs Canadian Solar CS3U-350PB-AG](https://comparepv.com/compare/canadian-solar-cs3u-355pb-ag/canadian-solar-cs3u-350pb-ag) - One difference: module efficiency --- Source: https://comparepv.com/compare/canadian-solar-cs3u-355pb-ag/canadian-solar-cs3u-365pb-ag Not in this file, on the page: the thirty-year yield curve year by year at a cell temperature you pick and a written summary generated on request.