Canadian Solar CS6.2-66TM-620 vs Canadian Solar CS6.2-66TM-615
VS
The verdict
620 leads on the differences that matter
The largest is module efficiency: 0.20 pp more efficient. 18 of 19 comparable parameters are identical.
See the one differenceHow alike are they
18
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
1 of 19 parameters
What actually differs
Parameter
620
615
Difference
Module efficiency
23.00 %
22.80 %
0.20 pp more efficient
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.
620
20,802 kWh
615
20,634 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
620
615
Standard test conditions
25 °C
100.0% of rated power
620 W
615 W
Cool, bright day
40 °C
95.7% of rated power
593 W
588 W
Typical summer roof
55 °C
91.3% of rated power
566 W
561 W
Hot roof
70 °C
87.0% of rated power
539 W
535 W
03
Full specification
Parameter
620
615
Difference
Power and efficiency
Rated power
620 Wp
615 Wp
Effectively the same
Module efficiency
23.00 %
22.80 %
+0.20 pp for 620
Power density
229.5 Wp/m²
227.7 Wp/m²
Effectively the same
Open-circuit voltage
48.40 V
48.20 V
Effectively the same
Voltage at max power
41.20 V
41.00 V
Effectively the same
Short-circuit current
16.08 A
16.02 A
Effectively the same
Current at max power
15.06 A
15.01 A
Effectively the same
Temperature
Temperature coefficient
-0.290 %/°C
-0.290 %/°C
Same
Mechanical
Dimensions
2382x1134x30 mm
2382x1134x30 mm
Same
Module area
2.701 m²
2.701 m²
Same
Weight
28.1 kg
28.1 kg
Same
Weight per kWp
45.3 kg/kWp
45.7 kg/kWp
Effectively the same
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
132
132
Same
Bifacial
No
No
Same
04
14,005 panels
Against the whole database
Efficiency
#1,919
vs
#2,714
620 leads by 795 places
Power density
#2,191
vs
#3,077
620 leads by 886 places
Heat behaviour
#2,165
vs
#2,165
Tied - the same position in the database
Weight
#690
vs
#844
620 leads by 154 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#2,436
vs
#2,792
620 leads by 356 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 CS6.2-66TM-615?
According to our database: Canadian Solar CS6.2-66TM-620 has higher module efficiency (23.00% 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-620 and Canadian Solar CS6.2-66TM-615?
Canadian Solar CS6.2-66TM-620 has a module efficiency of 23.00%, while Canadian Solar CS6.2-66TM-615 is 22.80%. 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 CS6.2-66TM-615?
Canadian Solar CS6.2-66TM-620 uses TOPCon cells; Canadian Solar CS6.2-66TM-615 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 CS6.2-66TM-615?
Canadian Solar CS6.2-66TM-620 has a 30 years power warranty; Canadian Solar CS6.2-66TM-615 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 40 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.