Canadian Solar CS6R-450T vs Canadian Solar CS6.2-66TM-620
VS
The verdict
CS6.2-66TM-620 leads on the differences that matter
The largest is rated power: 170 W more power. 9 of 19 comparable parameters are identical.
See all 10 differencesHow alike are they
9
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
10 of 19 parameters
What actually differs
Parameter
CS6R-450T
CS6.2-66TM-620
Difference
Rated power
450 Wp
620 Wp
170 W more power
Weight
21.3 kg
28.1 kg
6.8 kg lighter
Open-circuit voltage
39.80 V
48.40 V
8.60 V apart
Module area
1.953 m²
2.701 m²
0.748 m² apart
Short-circuit current
14.16 A
16.08 A
1.92 A apart
Voltage at max power
32.80 V
41.20 V
8.40 V apart
Cell count
108
132
24 cells apart
Weight per kWp
47.3 kg/kWp
45.3 kg/kWp
2.0 kg/kWp lighter
Current at max power
13.72 A
15.06 A
1.34 A apart
Dimensions
1722x1134x30 mm
2382x1134x30 mm
1722x1134x30 mm vs 2382x1134x30 mm
02
What it means on a roof
Thirty years of production
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.
CS6R-450T
15,098 kWh
CS6.2-66TM-620
20,802 kWh
Lifetime gap
5,704 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
CS6R-450T
CS6.2-66TM-620
Standard test conditions
25 °C
100.0% of rated power
450 W
620 W
Cool, bright day
40 °C
95.7% of rated power
430 W
593 W
Typical summer roof
55 °C
91.3% of rated power
411 W
566 W
Hot roof
70 °C
87.0% of rated power
391 W
539 W
03
Full specification
Parameter
CS6R-450T
CS6.2-66TM-620
Difference
Power and efficiency
Rated power
450 Wp
620 Wp
+170 W for CS6.2-66TM-620
Module efficiency
23.00 %
23.00 %
Same
Power density
230.4 Wp/m²
229.5 Wp/m²
Effectively the same
Open-circuit voltage
39.80 V
48.40 V
8.60 V apart
Voltage at max power
32.80 V
41.20 V
8.40 V apart
Short-circuit current
14.16 A
16.08 A
1.92 A apart
Current at max power
13.72 A
15.06 A
1.34 A apart
Temperature
Temperature coefficient
-0.290 %/°C
-0.290 %/°C
Same
Mechanical
Dimensions
1722x1134x30 mm
2382x1134x30 mm
1722x1134x30 mm vs 2382x1134x30 mm
Module area
1.953 m²
2.701 m²
0.748 m² apart
Weight
21.3 kg
28.1 kg
-6.8 kg for CS6R-450T
Weight per kWp
47.3 kg/kWp
45.3 kg/kWp
-2.0 kg/kWp for CS6.2-66TM-620
Warranty and degradation
Product warranty
12 yrs
12 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.40 %/yr
0.40 %/yr
Same
Technology
Cell technology
TOPCon
TOPCon
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
108
132
24 cells apart
Bifacial
No
No
Same
04
14,129 panels
Against the whole database
Efficiency
#1,970
vs
#1,970
Tied - the same position in the database
Power density
#1,758
vs
#2,243
CS6R-450T leads by 485 places
Heat behaviour
#2,220
vs
#2,220
Tied - the same position in the database
Weight
#1,641
vs
#690
CS6.2-66TM-620 leads by 951 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#8,470
vs
#2,465
CS6.2-66TM-620 leads by 6,005 places
05
Open the full database
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06
Written summary
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07
Questions about this pairing
Which panel is better: Canadian Solar CS6R-450T or Canadian Solar CS6.2-66TM-620?
According to our database: both panels are closely matched on key specs - the decision often comes down to price and local availability. See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Canadian Solar CS6R-450T and Canadian Solar CS6.2-66TM-620?
Canadian Solar CS6R-450T has a module efficiency of 23.00%, while Canadian Solar CS6.2-66TM-620 is 23.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Canadian Solar CS6R-450T use vs Canadian Solar CS6.2-66TM-620?
Canadian Solar CS6R-450T uses TOPCon cells; Canadian Solar CS6.2-66TM-620 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 CS6R-450T and Canadian Solar CS6.2-66TM-620?
Canadian Solar CS6R-450T has a 30 years power warranty; Canadian Solar CS6.2-66TM-620 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.
Shop prices: See 30 Canadian Solar offers
Every figure here is from the manufacturers' own datasheets - a dash means the value is not published, never an estimate. The thirty-year projection and the temperature scenarios are calculations from those figures, and each states its assumption above.