--- title: "Canadian Solar CS6.2-66TM-630 vs Canadian Solar CS6R-450T - Solar Panel Comparison | ComparePV" description: "Compare Canadian Solar CS6.2-66TM-630 vs Canadian Solar CS6R-450T 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-630/csi-solar-co-ltd-canadian-solar-cs6r-450t" image: "https://comparepv.com/og/compare/panels/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-630/csi-solar-co-ltd-canadian-solar-cs6r-450t.png" updated: 2026-09-11 --- # Canadian Solar CS6.2-66TM-630 vs Canadian Solar CS6R-450T CS6.2-66TM-630 leads on the differences that matter The largest is rated power: 180 W more power. 8 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Canadian Solar CS6.2-66TM-630](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-630) | [Canadian Solar CS6R-450T](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs6r-450t) | | Manufacturer | Canadian Solar | Canadian Solar | | Power | 630 Wp | 450 Wp | | Efficiency | 23.30 % | 23.00 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | CS6.2-66TM-630 | CS6R-450T | Difference | | --- | --- | --- | --- | | Rated power | 630 Wp | 450 Wp | +180 W for CS6.2-66TM-630 | | Weight | 28.1 kg | 21.3 kg | -6.8 kg for CS6R-450T | | Open-circuit voltage | 48.80 V | 39.80 V | 9.00 V apart | | Short-circuit current | 16.20 A | 14.16 A | 2.04 A apart | | Module area | 2.701 m² | 1.953 m² | 0.748 m² apart | | Module efficiency | 23.30 % | 23.00 % | +0.30 pp for CS6.2-66TM-630 | | Weight per kWp | 44.6 kg/kWp | 47.3 kg/kWp | -2.7 kg/kWp for CS6.2-66TM-630 | | Voltage at max power | 41.60 V | 32.80 V | 8.80 V apart | | Cell count | 132 | 108 | 24 cells apart | | Current at max power | 15.16 A | 13.72 A | 1.44 A apart | | Dimensions | 2382x1134x30 mm | 1722x1134x30 mm | 2382x1134x30 mm vs 1722x1134x30 mm | ## Every compared parameter | Parameter | CS6.2-66TM-630 | CS6R-450T | | --- | --- | --- | | Rated power | 630 Wp | 450 Wp | | Module efficiency | 23.30 % | 23.00 % | | Power density | 233.2 Wp/m² | 230.4 Wp/m² | | Open-circuit voltage | 48.80 V | 39.80 V | | Voltage at max power | 41.60 V | 32.80 V | | Short-circuit current | 16.20 A | 14.16 A | | Current at max power | 15.16 A | 13.72 A | | Temperature coefficient | -0.290 %/°C | -0.290 %/°C | | Dimensions | 2382x1134x30 mm | 1722x1134x30 mm | | Module area | 2.701 m² | 1.953 m² | | Weight | 28.1 kg | 21.3 kg | | Weight per kWp | 44.6 kg/kWp | 47.3 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 | 108 | | 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, CS6.2-66TM-630:** 21,138 kWh - **Cumulative output, CS6R-450T:** 15,098 kWh - **Gap:** 6,040 kWh ## Output when hot | Condition | Cell temperature | CS6.2-66TM-630 | CS6R-450T | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 630 W | 450 W | 100.0% of rated power | | Cool, bright day | 40 °C | 603 W | 430 W | 95.7% of rated power | | Typical summer roof | 55 °C | 575 W | 411 W | 91.3% of rated power | | Hot roof | 70 °C | 548 W | 391 W | 87.0% of rated power | ## Against the whole database | Measure | CS6.2-66TM-630 | CS6R-450T | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #1,057 | #1,970 | 14,129 | CS6.2-66TM-630 leads by 913 places | | Power density | #1,042 | #1,758 | 14,129 | CS6.2-66TM-630 leads by 716 places | | Heat behaviour | #2,220 | #2,220 | 14,129 | Tied - the same position in the database | | Weight | #485 | #1,641 | 14,129 | CS6.2-66TM-630 leads by 1,156 places | | Warranty | #21 | #21 | 14,129 | Tied - the same position in the database | | Overall | #1,921 | #8,470 | 14,129 | CS6.2-66TM-630 leads by 6,549 places | ## Questions ### Which panel is better: Canadian Solar CS6.2-66TM-630 or Canadian Solar CS6R-450T? According to our database: **Canadian Solar CS6.2-66TM-630** has higher module efficiency (**23.30%** 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-630 and Canadian Solar CS6R-450T? **Canadian Solar CS6.2-66TM-630** has a module efficiency of **23.30%**, while **Canadian Solar CS6R-450T** is **23.00%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Canadian Solar CS6.2-66TM-630 use vs Canadian Solar CS6R-450T? **Canadian Solar CS6.2-66TM-630** uses **TOPCon** cells; **Canadian Solar CS6R-450T** 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-630 and Canadian Solar CS6R-450T? **Canadian Solar CS6.2-66TM-630** has a **30 years** power warranty; **Canadian Solar CS6R-450T** 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-630 vs Canadian Solar CS6.2-66TM-635](https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-630/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-635) - One difference: module efficiency - [Canadian Solar CS6.2-66TM-630 vs Canadian Solar CS6.2-66TM-625](https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-630/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-625) - One difference: module efficiency - [Canadian Solar CS6.2-66TM-630 vs Canadian Solar CS6.2-66TM-620](https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-630/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-620) - 3 differences, the largest is module efficiency - [Canadian Solar CS6.2-66TM-630 vs Canadian Solar CS6.2-66TM-615](https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-630/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-615) - 3 differences, the largest is module efficiency - [Canadian Solar CS6.2-66TM-630 vs Canadian Solar CS6.2-66TM-610](https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-630/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-610) - 3 differences, the largest is module efficiency - [Canadian Solar CS6.2-66TM-630 vs Canadian Solar CS6W-600T](https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-630/csi-solar-co-ltd-canadian-solar-cs6w-600t) - 8 differences, the largest is rated power --- Source: https://comparepv.com/compare/csi-solar-co-ltd-canadian-solar-cs6-2-66tm-630/csi-solar-co-ltd-canadian-solar-cs6r-450t 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.