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66TM-615 vs 54TM-520 9 of 19 identical Swap Change panels

Canadian Solar CS6.2-66TM-615 vs Canadian Solar CS6.2-54TM-520

Canadian Solar CS6.2-66TM-615
CS6.2-66TM-615
615 Wp 22.80 % TOPCon
Open panel page Datasheet PDF
VS
Canadian Solar CS6.2-54TM-520
CS6.2-54TM-520
520 Wp 23.40 % TOPCon
Open panel page Datasheet PDF
The verdict

54TM-520 leads on the differences that matter

The largest is rated power: 95 W more power. 9 of 19 comparable parameters are identical.

See all 10 differences
How alike are they
9 of 19 comparable
parameters are identical
identical differs
01

What actually differs

10 of 19 parameters
Parameter 66TM-615 54TM-520 Difference
Rated power 615 Wp 520 Wp 95 W more power
Module efficiency 22.80 % 23.40 % 0.60 pp more efficient
Weight 28.1 kg 23.3 kg 4.8 kg lighter
Product warranty 12 yrs 15 yrs 3 yrs longer
Power density 227.7 Wp/m² 233.8 Wp/m² 6.2 Wp/m² higher
Open-circuit voltage 48.20 V 40.40 V 7.80 V apart
Module area 2.701 m² 2.224 m² 0.477 m² apart
Voltage at max power 41.00 V 34.20 V 6.80 V apart
Cell count 132 108 24 cells apart
Dimensions 2382x1134x30 mm 1961x1134x30 mm 2382x1134x30 mm vs 1961x1134x30 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-615
20,634 kWh
54TM-520
17,447 kWh
Lifetime gap
3,187 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 66TM-615 54TM-520
Standard test conditions 25 °C 100.0% of rated power 615 W 520 W
Cool, bright day 40 °C 95.7% of rated power 588 W 497 W
Typical summer roof 55 °C 91.3% of rated power 561 W 475 W
Hot roof 70 °C 87.0% of rated power 535 W 452 W
03

Full specification

Parameter 66TM-615 54TM-520 Difference
Power and efficiency
Rated power 615 Wp 520 Wp +95 W for 66TM-615
Module efficiency 22.80 % 23.40 % +0.60 pp for 54TM-520
Power density 227.7 Wp/m² 233.8 Wp/m² +6.2 Wp/m² for 54TM-520
Open-circuit voltage 48.20 V 40.40 V 7.80 V apart
Voltage at max power 41.00 V 34.20 V 6.80 V apart
Short-circuit current 16.02 A 16.20 A Effectively the same
Current at max power 15.01 A 15.22 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 2382x1134x30 mm 1961x1134x30 mm 2382x1134x30 mm vs 1961x1134x30 mm
Module area 2.701 m² 2.224 m² 0.477 m² apart
Weight 28.1 kg 23.3 kg -4.8 kg for 54TM-520
Weight per kWp 45.7 kg/kWp 44.8 kg/kWp Effectively the same
Warranty and degradation
Product warranty 12 yrs 15 yrs +3 yrs for 54TM-520
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 132 108 24 cells apart
Bifacial No No Same
04

Against the whole database

14,005 panels
Efficiency
#2,714 vs #882
54TM-520 leads by 1,832 places
Power density
#3,077 vs #909
54TM-520 leads by 2,168 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#844 vs #540
54TM-520 leads by 304 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#2,792 vs #4,712
66TM-615 leads by 1,920 places
05

More useful comparisons

Open the full database
Same series, other bin
Canadian Solar CS6.2-66TM-615 vs Canadian Solar CS6.2-66TM-635
4 differences, the largest is module efficiency
Same series, other bin
Canadian Solar CS6.2-66TM-615 vs Canadian Solar CS6.2-66TM-630
3 differences, the largest is module efficiency
Same series, other bin
Canadian Solar CS6.2-66TM-615 vs Canadian Solar CS6.2-66TM-625
3 differences, the largest is module efficiency
Same series, other bin
Canadian Solar CS6.2-66TM-615 vs Canadian Solar CS6.2-66TM-620
One difference: module efficiency
Same series, other bin
Canadian Solar CS6.2-66TM-615 vs Canadian Solar CS6.2-66TM-610
One difference: module efficiency
Same series, other bin
Canadian Solar CS6.2-66TM-615 vs Canadian Solar CS6W-600T
10 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Canadian Solar CS6.2-66TM-615 or Canadian Solar CS6.2-54TM-520?
According to our database: Canadian Solar CS6.2-54TM-520 has higher module efficiency (23.40% 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 CS6.2-54TM-520?
Canadian Solar CS6.2-66TM-615 has a module efficiency of 22.80%, while Canadian Solar CS6.2-54TM-520 is 23.40%. 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 CS6.2-54TM-520?
Canadian Solar CS6.2-66TM-615 uses TOPCon cells; Canadian Solar CS6.2-54TM-520 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 CS6.2-54TM-520?
Canadian Solar CS6.2-66TM-615 has a 30 years power warranty; Canadian Solar CS6.2-54TM-520 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.

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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.