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425 vs 445 13 of 19 identical Swap Change panels

Trina Solar TSM-NEG9RC.27-425 vs Trina Solar TSM-NEG9RC.27-445

Trina Solar TSM-NEG9RC.27-425
TSM-NEG9RC.27-425
425 Wp 21.30 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Trina Solar TSM-NEG9RC.27-445
TSM-NEG9RC.27-445
445 Wp 22.30 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

445 leads on the differences that matter

The largest is module efficiency: 1.00 pp more efficient. 13 of 19 comparable parameters are identical.

See all 6 differences
How alike are they
13 of 19 comparable
parameters are identical
identical differs
01

What actually differs

6 of 19 parameters
Parameter 425 445 Difference
Module efficiency 21.30 % 22.30 % 1.00 pp more efficient
Power density 212.7 Wp/m² 222.7 Wp/m² 10.0 Wp/m² higher
Rated power 425 Wp 445 Wp 20 W more power
Open-circuit voltage 50.90 V 52.60 V 1.70 V apart
Weight per kWp 49.4 kg/kWp 47.2 kg/kWp 2.2 kg/kWp lighter
Voltage at max power 42.90 V 44.30 V 1.40 V apart
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.
425
14,260 kWh
445
14,931 kWh
Lifetime gap
671 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 425 445
Standard test conditions 25 °C 100.0% of rated power 425 W 445 W
Cool, bright day 40 °C 95.7% of rated power 407 W 426 W
Typical summer roof 55 °C 91.3% of rated power 388 W 406 W
Hot roof 70 °C 87.0% of rated power 370 W 387 W
03

Full specification

Parameter 425 445 Difference
Power and efficiency
Rated power 425 Wp 445 Wp +20 W for 445
Module efficiency 21.30 % 22.30 % +1.00 pp for 445
Power density 212.7 Wp/m² 222.7 Wp/m² +10.0 Wp/m² for 445
Open-circuit voltage 50.90 V 52.60 V 1.70 V apart
Voltage at max power 42.90 V 44.30 V 1.40 V apart
Short-circuit current 10.56 A 10.71 A Effectively the same
Current at max power 9.92 A 10.05 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 1762x1134x30 mm 1762x1134x30 mm Same
Module area 1.998 m² 1.998 m² Same
Weight 21.0 kg 21.0 kg Same
Weight per kWp 49.4 kg/kWp 47.2 kg/kWp -2.2 kg/kWp for 445
Warranty and degradation
Product warranty 15 yrs 15 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 144 144 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#8,519 vs #5,100
445 leads by 3,419 places
Power density
#8,733 vs #5,302
445 leads by 3,431 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#2,909 vs #1,537
445 leads by 1,372 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#10,224 vs #8,734
445 leads by 1,490 places
05

More useful comparisons

Open the full database
Same series, other bin
Trina Solar TSM-NEG9RC.27-425 vs Trina Solar TSM-NEG9RC.27-450
6 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-NEG9RC.27-425 vs Trina Solar TSM-NEG9RC.27-440
5 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-NEG9RC.27-425 vs Trina Solar TSM-NEG9RC.27-435
3 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-NEG9RC.27-425 vs Trina Solar TSM-NEG9RC.27-430
One difference: module efficiency
Same manufacturer
Trina Solar TSM-NEG9RC.27-425 vs Trina Solar TSM-NEG21C.20Q-760
12 differences, the largest is module efficiency
Same manufacturer
Trina Solar TSM-NEG9RC.27-425 vs Trina Solar TSM-NEG21C.20Q-755
12 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Trina Solar TSM-NEG9RC.27-425 or Trina Solar TSM-NEG9RC.27-445?
According to our database: Trina Solar TSM-NEG9RC.27-445 has higher module efficiency (22.30% vs 21.30%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Trina Solar TSM-NEG9RC.27-425 and Trina Solar TSM-NEG9RC.27-445?
Trina Solar TSM-NEG9RC.27-425 has a module efficiency of 21.30%, while Trina Solar TSM-NEG9RC.27-445 is 22.30%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Trina Solar TSM-NEG9RC.27-425 use vs Trina Solar TSM-NEG9RC.27-445?
Trina Solar TSM-NEG9RC.27-425 uses TOPCon cells; Trina Solar TSM-NEG9RC.27-445 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 Trina Solar TSM-NEG9RC.27-425 and Trina Solar TSM-NEG9RC.27-445?
Trina Solar TSM-NEG9RC.27-425 has a 30 years power warranty; Trina Solar TSM-NEG9RC.27-445 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 Trina Solar TSM-NEG9RC.27-425 and Trina Solar TSM-NEG9RC.27-445 bifacial panels?
Both Trina Solar TSM-NEG9RC.27-425 and Trina Solar TSM-NEG9RC.27-445 are bifacial - they capture reflected light from the ground, which can add 5-15% more annual energy on ground-mount or elevated rooftop installations with a light surface beneath.

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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.