--- title: "Canadian Solar CS6.2-66TM-610 vs Canadian Solar CS6.2-66TM-635 - Solar Panel Comparison | ComparePV" description: "Compare Canadian Solar CS6.2-66TM-610 vs Canadian Solar CS6.2-66TM-635 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-610/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-635" updated: 2026-09-11 --- # Canadian Solar CS6.2-66TM-610 vs Canadian Solar CS6.2-66TM-635 635 leads on the differences that matter The largest is module efficiency: 0.90 pp more efficient. 14 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Canadian Solar CS6.2-66TM-610](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-610) | [Canadian Solar CS6.2-66TM-635](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-635) | | Manufacturer | Canadian Solar | Canadian Solar | | Power | 610 Wp | 635 Wp | | Efficiency | 22.60 % | 23.50 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 610 | 635 | Difference | | --- | --- | --- | --- | | Module efficiency | 22.60 % | 23.50 % | +0.90 pp for 635 | | Power density | 225.8 Wp/m² | 235.1 Wp/m² | +9.3 Wp/m² for 635 | | Rated power | 610 Wp | 635 Wp | +25 W for 635 | | Open-circuit voltage | 48.00 V | 49.40 V | 1.40 V apart | | Voltage at max power | 40.80 V | 41.90 V | 1.10 V apart | ## Every compared parameter | Parameter | 610 | 635 | | --- | --- | --- | | Rated power | 610 Wp | 635 Wp | | Module efficiency | 22.60 % | 23.50 % | | Power density | 225.8 Wp/m² | 235.1 Wp/m² | | Open-circuit voltage | 48.00 V | 49.40 V | | Voltage at max power | 40.80 V | 41.90 V | | Short-circuit current | 15.97 A | 16.22 A | | Current at max power | 14.96 A | 15.18 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 | 46.1 kg/kWp | 44.3 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, 610:** 20,467 kWh - **Cumulative output, 635:** 21,306 kWh - **Gap:** 839 kWh ## Output when hot | Condition | Cell temperature | 610 | 635 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 610 W | 635 W | 100.0% of rated power | | Cool, bright day | 40 °C | 583 W | 607 W | 95.7% of rated power | | Typical summer roof | 55 °C | 557 W | 580 W | 91.3% of rated power | | Hot roof | 70 °C | 530 W | 552 W | 87.0% of rated power | ## Against the whole database | Measure | 610 | 635 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #3,658 | #716 | 14,005 | 635 leads by 2,942 places | | Power density | #3,729 | #741 | 14,005 | 635 leads by 2,988 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #971 | #408 | 14,005 | 635 leads by 563 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #3,201 | #1,683 | 14,005 | 635 leads by 1,518 places | ## Questions ### Which panel is better: Canadian Solar CS6.2-66TM-610 or Canadian Solar CS6.2-66TM-635? According to our database: **Canadian Solar CS6.2-66TM-635** has higher module efficiency (**23.50%** vs **22.60%**). 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-610 and Canadian Solar CS6.2-66TM-635? **Canadian Solar CS6.2-66TM-610** has a module efficiency of **22.60%**, while **Canadian Solar CS6.2-66TM-635** is **23.50%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Canadian Solar CS6.2-66TM-610 use vs Canadian Solar CS6.2-66TM-635? **Canadian Solar CS6.2-66TM-610** uses **TOPCon** cells; **Canadian Solar CS6.2-66TM-635** 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-610 and Canadian Solar CS6.2-66TM-635? **Canadian Solar CS6.2-66TM-610** has a **30 years** power warranty; **Canadian Solar CS6.2-66TM-635** 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-610 vs Canadian Solar CS6.2-66TM-630](https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-610/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-630) - 3 differences, the largest is module efficiency - [Canadian Solar CS6.2-66TM-610 vs Canadian Solar CS6.2-66TM-625](https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-610/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-625) - 3 differences, the largest is module efficiency - [Canadian Solar CS6.2-66TM-610 vs Canadian Solar CS6.2-66TM-620](https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-610/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-620) - 3 differences, the largest is module efficiency - [Canadian Solar CS6.2-66TM-610 vs Canadian Solar CS6.2-66TM-615](https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-610/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-615) - One difference: module efficiency - [Canadian Solar CS6.2-66TM-610 vs Canadian Solar CS6W-600T](https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-610/csi-solar-co-ltd-canadian-solar-cs6w-600t) - 10 differences, the largest is module efficiency - [Canadian Solar CS6.2-66TM-610 vs Canadian Solar CS6W-595T](https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-610/csi-solar-co-ltd-canadian-solar-cs6w-595t) - 10 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-610/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-635 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.