Canadian Solar CS6.2-66TM-620 vs Canadian Solar CS6.2-48TD-450
VS
The verdict
66TM-620 leads on the differences that matter
The largest is rated power: 170 W more power. 5 of 19 comparable parameters are identical.
See all 14 differencesHow alike are they
5
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
14 of 19 parameters
What actually differs
Parameter
66TM-620
48TD-450
Difference
Rated power
620 Wp
450 Wp
170 W more power
Module efficiency
23.00 %
22.50 %
0.50 pp more efficient
Weight per kWp
45.3 kg/kWp
54.7 kg/kWp
9.3 kg/kWp lighter
Product warranty
12 yrs
25 yrs
13 yrs longer
Weight
28.1 kg
24.6 kg
3.5 kg lighter
Open-circuit voltage
48.40 V
52.90 V
4.50 V apart
Short-circuit current
16.08 A
10.68 A
5.40 A apart
Module area
2.701 m²
1.998 m²
0.703 m² apart
Power density
229.5 Wp/m²
225.2 Wp/m²
4.3 Wp/m² higher
Current at max power
15.06 A
10.05 A
5.01 A apart
Cell count
132
144
12 cells apart
Voltage at max power
41.20 V
44.80 V
3.60 V apart
Bifacial
No
Yes
No vs Yes
Dimensions
2382x1134x30 mm
1762x1134x30 mm
2382x1134x30 mm vs 1762x1134x30 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.
66TM-620
20,802 kWh
48TD-450
15,098 kWh
Lifetime gap
5,704 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
66TM-620
48TD-450
Standard test conditions
25 °C
100.0% of rated power
620 W
450 W
Cool, bright day
40 °C
95.7% of rated power
593 W
430 W
Typical summer roof
55 °C
91.3% of rated power
566 W
411 W
Hot roof
70 °C
87.0% of rated power
539 W
391 W
03
Full specification
Parameter
66TM-620
48TD-450
Difference
Power and efficiency
Rated power
620 Wp
450 Wp
+170 W for 66TM-620
Module efficiency
23.00 %
22.50 %
+0.50 pp for 66TM-620
Power density
229.5 Wp/m²
225.2 Wp/m²
+4.3 Wp/m² for 66TM-620
Open-circuit voltage
48.40 V
52.90 V
4.50 V apart
Voltage at max power
41.20 V
44.80 V
3.60 V apart
Short-circuit current
16.08 A
10.68 A
5.40 A apart
Current at max power
15.06 A
10.05 A
5.01 A apart
Temperature
Temperature coefficient
-0.290 %/°C
-0.290 %/°C
Same
Mechanical
Dimensions
2382x1134x30 mm
1762x1134x30 mm
2382x1134x30 mm vs 1762x1134x30 mm
Module area
2.701 m²
1.998 m²
0.703 m² apart
Weight
28.1 kg
24.6 kg
-3.5 kg for 48TD-450
Weight per kWp
45.3 kg/kWp
54.7 kg/kWp
-9.3 kg/kWp for 66TM-620
Warranty and degradation
Product warranty
12 yrs
25 yrs
+13 yrs for 48TD-450
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
132
144
12 cells apart
Bifacial
No
Yes
No vs Yes
04
14,005 panels
Against the whole database
Efficiency
#1,919
vs
#4,222
66TM-620 leads by 2,303 places
Power density
#2,191
vs
#4,225
66TM-620 leads by 2,034 places
Heat behaviour
#2,165
vs
#2,165
Tied - the same position in the database
Weight
#690
vs
#9,063
66TM-620 leads by 8,373 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#2,436
vs
#6,225
66TM-620 leads by 3,789 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 CS6.2-66TM-620 or Canadian Solar CS6.2-48TD-450?
According to our database: Canadian Solar CS6.2-66TM-620 has higher module efficiency (23.00% vs 22.50%). 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 CS6.2-48TD-450?
Canadian Solar CS6.2-66TM-620 has a module efficiency of 23.00%, while Canadian Solar CS6.2-48TD-450 is 22.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Canadian Solar CS6.2-66TM-620 use vs Canadian Solar CS6.2-48TD-450?
Canadian Solar CS6.2-66TM-620 uses TOPCon cells; Canadian Solar CS6.2-48TD-450 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 CS6.2-48TD-450?
Canadian Solar CS6.2-66TM-620 has a 30 years power warranty; Canadian Solar CS6.2-48TD-450 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.
Are Canadian Solar CS6.2-66TM-620 and Canadian Solar CS6.2-48TD-450 bifacial panels?
Canadian Solar CS6.2-48TD-450 is bifacial (captures light from both faces); Canadian Solar CS6.2-66TM-620 is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.
Shop prices: See 38 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.