--- title: "Canadian Solar CS6.2-66TM-620 vs Canadian Solar CS6.2-66TM-625 - Solar Panel Comparison | ComparePV" description: "Compare Canadian Solar CS6.2-66TM-620 vs Canadian Solar CS6.2-66TM-625 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-620/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-625" updated: 2026-09-11 --- # Canadian Solar CS6.2-66TM-620 vs Canadian Solar CS6.2-66TM-625 Identical on every published parameter All 19 comparable parameters agree. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Canadian Solar CS6.2-66TM-620](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-620) | [Canadian Solar CS6.2-66TM-625](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-625) | | Manufacturer | Canadian Solar | Canadian Solar | | Power | 620 Wp | 625 Wp | | Efficiency | 23.00 % | 23.10 % | | Technology | TOPCon | TOPCon | ## Every compared parameter | Parameter | 620 | 625 | | --- | --- | --- | | Rated power | 620 Wp | 625 Wp | | Module efficiency | 23.00 % | 23.10 % | | Power density | 229.5 Wp/m² | 231.4 Wp/m² | | Open-circuit voltage | 48.40 V | 48.60 V | | Voltage at max power | 41.20 V | 41.40 V | | Short-circuit current | 16.08 A | 16.14 A | | Current at max power | 15.06 A | 15.11 A | | Temperature coefficient | -0.290 %/°C | -0.290 %/°C | | Dimensions | 2382x1134x30 mm | 2382x1134x30 mm | | Module area | 2.701 m² | 2.701 m² | | Weight | 28.1 kg | 28.1 kg | | Weight per kWp | 45.3 kg/kWp | 45.0 kg/kWp | | Product warranty | 12 yrs | 12 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.40 %/yr | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 132 | 132 | | Bifacial | No | No | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year Same temp coeff. for both panels (-0.290 %/°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, 620:** 20,802 kWh - **Cumulative output, 625:** 20,970 kWh - **Gap:** 168 kWh ## Output when hot | Condition | Cell temperature | 620 | 625 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 620 W | 625 W | 100.0% of rated power | | Cool, bright day | 40 °C | 593 W | 598 W | 95.7% of rated power | | Typical summer roof | 55 °C | 566 W | 571 W | 91.3% of rated power | | Hot roof | 70 °C | 539 W | 543 W | 87.0% of rated power | ## Against the whole database | Measure | 620 | 625 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #1,919 | #1,570 | 14,005 | 625 leads by 349 places | | Power density | #2,191 | #1,513 | 14,005 | 625 leads by 678 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #690 | #572 | 14,005 | 625 leads by 118 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #2,436 | #2,188 | 14,005 | 625 leads by 248 places | ## Questions ### Which panel is better: Canadian Solar CS6.2-66TM-620 or Canadian Solar CS6.2-66TM-625? According to our database: **Canadian Solar CS6.2-66TM-625** has higher module efficiency (**23.10%** vs **23.00%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Canadian Solar CS6.2-66TM-620 and Canadian Solar CS6.2-66TM-625? **Canadian Solar CS6.2-66TM-620** has a module efficiency of **23.00%**, while **Canadian Solar CS6.2-66TM-625** is **23.10%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Canadian Solar CS6.2-66TM-620 use vs Canadian Solar CS6.2-66TM-625? **Canadian Solar CS6.2-66TM-620** uses **TOPCon** cells; **Canadian Solar CS6.2-66TM-625** uses **TOPCon**. 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 CS6.2-66TM-620 and Canadian Solar CS6.2-66TM-625? **Canadian Solar CS6.2-66TM-620** has a **30 years** power warranty; **Canadian Solar CS6.2-66TM-625** 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. ## Related comparisons - [Canadian Solar CS6.2-66TM-620 vs Canadian Solar CS6.2-66TM-635](https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-620/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-635) - 4 differences, the largest is module efficiency - [Canadian Solar CS6.2-66TM-620 vs Canadian Solar CS6.2-66TM-630](https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-620/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-630) - 3 differences, the largest is module efficiency - [Canadian Solar CS6.2-66TM-620 vs Canadian Solar CS6.2-66TM-615](https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-620/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-615) - One difference: module efficiency - [Canadian Solar CS6.2-66TM-620 vs Canadian Solar CS6.2-66TM-610](https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-620/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-610) - 3 differences, the largest is module efficiency - [Canadian Solar CS6.2-66TM-620 vs Canadian Solar CS6W-600T](https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-620/csi-solar-co-ltd-canadian-solar-cs6w-600t) - 9 differences, the largest is rated power - [Canadian Solar CS6.2-66TM-620 vs Canadian Solar CS6W-595T](https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-620/csi-solar-co-ltd-canadian-solar-cs6w-595t) - 8 differences, the largest is rated power --- Source: https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-620/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-625 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.