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445 vs 425 13 of 19 identical Swap Change panels

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

Trina Solar TSM-NEG9RC.27-445
TSM-NEG9RC.27-445
445 Wp 22.30 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Trina Solar TSM-NEG9RC.27-425
TSM-NEG9RC.27-425
425 Wp 21.30 % 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 445 425 Difference
Module efficiency 22.30 % 21.30 % 1.00 pp more efficient
Power density 222.7 Wp/m² 212.7 Wp/m² 10.0 Wp/m² higher
Rated power 445 Wp 425 Wp 20 W more power
Open-circuit voltage 52.60 V 50.90 V 1.70 V apart
Weight per kWp 47.2 kg/kWp 49.4 kg/kWp 2.2 kg/kWp lighter
Voltage at max power 44.30 V 42.90 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.
445
14,931 kWh
425
14,260 kWh
Lifetime gap
671 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 445 425
Standard test conditions 25 °C 100.0% of rated power 445 W 425 W
Cool, bright day 40 °C 95.7% of rated power 426 W 407 W
Typical summer roof 55 °C 91.3% of rated power 406 W 388 W
Hot roof 70 °C 87.0% of rated power 387 W 370 W
03

Full specification

Parameter 445 425 Difference
Power and efficiency
Rated power 445 Wp 425 Wp +20 W for 445
Module efficiency 22.30 % 21.30 % +1.00 pp for 445
Power density 222.7 Wp/m² 212.7 Wp/m² +10.0 Wp/m² for 445
Open-circuit voltage 52.60 V 50.90 V 1.70 V apart
Voltage at max power 44.30 V 42.90 V 1.40 V apart
Short-circuit current 10.71 A 10.56 A Effectively the same
Current at max power 10.05 A 9.92 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 47.2 kg/kWp 49.4 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
#5,100 vs #8,519
445 leads by 3,419 places
Power density
#5,302 vs #8,733
445 leads by 3,431 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#1,537 vs #2,909
445 leads by 1,372 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#8,734 vs #10,224
445 leads by 1,490 places
05

More useful comparisons

Open the full database
Same series, other bin
Trina Solar TSM-NEG9RC.27-445 vs Trina Solar TSM-NEG9RC.27-450
One difference: module efficiency
Same series, other bin
Trina Solar TSM-NEG9RC.27-445 vs Trina Solar TSM-NEG9RC.27-440
One difference: module efficiency
Same series, other bin
Trina Solar TSM-NEG9RC.27-445 vs Trina Solar TSM-NEG9RC.27-435
3 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-NEG9RC.27-445 vs Trina Solar TSM-NEG9RC.27-430
5 differences, the largest is module efficiency
Same manufacturer
Trina Solar TSM-NEG9RC.27-445 vs Trina Solar TSM-NEG21C.20Q-760
15 differences, the largest is module efficiency
Same manufacturer
Trina Solar TSM-NEG9RC.27-445 vs Trina Solar TSM-NEG21C.20Q-755
15 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Trina Solar TSM-NEG9RC.27-445 or Trina Solar TSM-NEG9RC.27-425?
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.27-445 and Trina Solar TSM-NEG9RC.27-425?
Trina Solar TSM-NEG9RC.27-445 has a module efficiency of 22.30%, while Trina Solar TSM-NEG9RC.27-425 is 21.30%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Trina Solar TSM-NEG9RC.27-445 use vs Trina Solar TSM-NEG9RC.27-425?
Trina Solar TSM-NEG9RC.27-445 uses TOPCon cells; Trina Solar TSM-NEG9RC.27-425 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.27-445 and Trina Solar TSM-NEG9RC.27-425?
Trina Solar TSM-NEG9RC.27-445 has a 30 years power warranty; Trina Solar TSM-NEG9RC.27-425 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.27-445 and Trina Solar TSM-NEG9RC.27-425 bifacial panels?
Both Trina Solar TSM-NEG9RC.27-445 and Trina Solar TSM-NEG9RC.27-425 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.