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66TM-625 vs 54TM-510 10 of 19 identical Swap Change panels

Canadian Solar CS6.2-66TM-625 vs Canadian Solar CS6.2-54TM-510

Canadian Solar CS6.2-66TM-625
CS6.2-66TM-625
625 Wp 23.10 % TOPCon
Open panel page Datasheet PDF
VS
Canadian Solar CS6.2-54TM-510
CS6.2-54TM-510
510 Wp 22.90 % TOPCon
Open panel page Datasheet PDF
The verdict

9 differences, and they point both ways

The largest is rated power: 115 W more power. 10 of 19 comparable parameters are identical.

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

What actually differs

9 of 19 parameters
Parameter 66TM-625 54TM-510 Difference
Rated power 625 Wp 510 Wp 115 W more power
Weight 28.1 kg 23.3 kg 4.8 kg lighter
Product warranty 12 yrs 15 yrs 3 yrs longer
Open-circuit voltage 48.60 V 40.00 V 8.60 V apart
Module area 2.701 m² 2.224 m² 0.477 m² apart
Module efficiency 23.10 % 22.90 % 0.20 pp more efficient
Voltage at max power 41.40 V 33.80 V 7.60 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-625
20,970 kWh
54TM-510
17,112 kWh
Lifetime gap
3,858 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 66TM-625 54TM-510
Standard test conditions 25 °C 100.0% of rated power 625 W 510 W
Cool, bright day 40 °C 95.7% of rated power 598 W 488 W
Typical summer roof 55 °C 91.3% of rated power 571 W 466 W
Hot roof 70 °C 87.0% of rated power 543 W 443 W
03

Full specification

Parameter 66TM-625 54TM-510 Difference
Power and efficiency
Rated power 625 Wp 510 Wp +115 W for 66TM-625
Module efficiency 23.10 % 22.90 % +0.20 pp for 66TM-625
Power density 231.4 Wp/m² 229.3 Wp/m² Effectively the same
Open-circuit voltage 48.60 V 40.00 V 8.60 V apart
Voltage at max power 41.40 V 33.80 V 7.60 V apart
Short-circuit current 16.14 A 16.10 A Effectively the same
Current at max power 15.11 A 15.10 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-510
Weight per kWp 45.0 kg/kWp 45.7 kg/kWp Effectively the same
Warranty and degradation
Product warranty 12 yrs 15 yrs +3 yrs for 54TM-510
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
#1,570 vs #2,359
66TM-625 leads by 789 places
Power density
#1,513 vs #2,343
66TM-625 leads by 830 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#572 vs #836
66TM-625 leads by 264 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#2,188 vs #5,595
66TM-625 leads by 3,407 places
05

More useful comparisons

Open the full database
Same series, other bin
Canadian Solar CS6.2-66TM-625 vs Canadian Solar CS6.2-66TM-635
3 differences, the largest is module efficiency
Same series, other bin
Canadian Solar CS6.2-66TM-625 vs Canadian Solar CS6.2-66TM-630
One difference: module efficiency
Same series, other bin
Canadian Solar CS6.2-66TM-625 vs Canadian Solar CS6.2-66TM-620
The same specification on paper
Same series, other bin
Canadian Solar CS6.2-66TM-625 vs Canadian Solar CS6.2-66TM-615
3 differences, the largest is module efficiency
Same series, other bin
Canadian Solar CS6.2-66TM-625 vs Canadian Solar CS6.2-66TM-610
3 differences, the largest is module efficiency
Same series, other bin
Canadian Solar CS6.2-66TM-625 vs Canadian Solar CS6W-600T
8 differences, the largest is rated power
06

Written summary

07

Questions about this pairing

Which panel is better: Canadian Solar CS6.2-66TM-625 or Canadian Solar CS6.2-54TM-510?
According to our database: Canadian Solar CS6.2-66TM-625 has higher module efficiency (23.10% vs 22.90%). 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-625 and Canadian Solar CS6.2-54TM-510?
Canadian Solar CS6.2-66TM-625 has a module efficiency of 23.10%, while Canadian Solar CS6.2-54TM-510 is 22.90%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Canadian Solar CS6.2-66TM-625 use vs Canadian Solar CS6.2-54TM-510?
Canadian Solar CS6.2-66TM-625 uses TOPCon cells; Canadian Solar CS6.2-54TM-510 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-625 and Canadian Solar CS6.2-54TM-510?
Canadian Solar CS6.2-66TM-625 has a 30 years power warranty; Canadian Solar CS6.2-54TM-510 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.