--- title: "Canadian Solar CS6.2-66TM-615 vs Canadian Solar CS6.2-66TM-625 - Solar Panel Comparison | ComparePV" description: "Compare Canadian Solar CS6.2-66TM-615 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-615/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-625" updated: 2026-09-11 --- # Canadian Solar CS6.2-66TM-615 vs Canadian Solar CS6.2-66TM-625 625 leads on the differences that matter The largest is module efficiency: 0.30 pp more efficient. 16 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Canadian Solar CS6.2-66TM-615](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-615) | [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 | 615 Wp | 625 Wp | | Efficiency | 22.80 % | 23.10 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 615 | 625 | Difference | | --- | --- | --- | --- | | Module efficiency | 22.80 % | 23.10 % | +0.30 pp for 625 | | Power density | 227.7 Wp/m² | 231.4 Wp/m² | +3.7 Wp/m² for 625 | | Rated power | 615 Wp | 625 Wp | +10 W for 625 | ## Every compared parameter | Parameter | 615 | 625 | | --- | --- | --- | | Rated power | 615 Wp | 625 Wp | | Module efficiency | 22.80 % | 23.10 % | | Power density | 227.7 Wp/m² | 231.4 Wp/m² | | Open-circuit voltage | 48.20 V | 48.60 V | | Voltage at max power | 41.00 V | 41.40 V | | Short-circuit current | 16.02 A | 16.14 A | | Current at max power | 15.01 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 | 45.7 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, 615:** 20,634 kWh - **Cumulative output, 625:** 20,970 kWh - **Gap:** 336 kWh ## Output when hot | Condition | Cell temperature | 615 | 625 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 615 W | 625 W | 100.0% of rated power | | Cool, bright day | 40 °C | 588 W | 598 W | 95.7% of rated power | | Typical summer roof | 55 °C | 561 W | 571 W | 91.3% of rated power | | Hot roof | 70 °C | 535 W | 543 W | 87.0% of rated power | ## Against the whole database | Measure | 615 | 625 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #2,714 | #1,570 | 14,005 | 625 leads by 1,144 places | | Power density | #3,077 | #1,513 | 14,005 | 625 leads by 1,564 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #844 | #572 | 14,005 | 625 leads by 272 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #2,792 | #2,188 | 14,005 | 625 leads by 604 places | ## Questions ### Which panel is better: Canadian Solar CS6.2-66TM-615 or Canadian Solar CS6.2-66TM-625? According to our database: **Canadian Solar CS6.2-66TM-625** has higher module efficiency (**23.10%** vs **22.80%**). 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-615 and Canadian Solar CS6.2-66TM-625? **Canadian Solar CS6.2-66TM-615** has a module efficiency of **22.80%**, 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-615 use vs Canadian Solar CS6.2-66TM-625? **Canadian Solar CS6.2-66TM-615** 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-615 and Canadian Solar CS6.2-66TM-625? **Canadian Solar CS6.2-66TM-615** 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-615 vs Canadian Solar CS6.2-66TM-635](https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-615/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-635) - 4 differences, the largest is module efficiency - [Canadian Solar CS6.2-66TM-615 vs Canadian Solar CS6.2-66TM-630](https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-615/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-630) - 3 differences, the largest is module efficiency - [Canadian Solar CS6.2-66TM-615 vs Canadian Solar CS6.2-66TM-620](https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-615/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-620) - One difference: module efficiency - [Canadian Solar CS6.2-66TM-615 vs Canadian Solar CS6.2-66TM-610](https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-615/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-610) - One difference: module efficiency - [Canadian Solar CS6.2-66TM-615 vs Canadian Solar CS6W-600T](https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-615/csi-solar-co-ltd-canadian-solar-cs6w-600t) - 10 differences, the largest is module efficiency - [Canadian Solar CS6.2-66TM-615 vs Canadian Solar CS6W-595T](https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-615/csi-solar-co-ltd-canadian-solar-cs6w-595t) - 9 differences, the largest is rated power --- Source: https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-615/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.