Skip to main content
615 vs 640 13 of 19 identical Swap Change panels

Trina Solar TSM-NEG19RC.70-615 vs Trina Solar TSM-NEG19RC.70-640

Trina Solar TSM-NEG19RC.70-615
TSM-NEG19RC.70-615
615 Wp 22.80 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Trina Solar TSM-NEG19RC.70-640
TSM-NEG19RC.70-640
640 Wp 23.70 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

640 leads on the differences that matter

The largest is module efficiency: 0.90 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 615 640 Difference
Module efficiency 22.80 % 23.70 % 0.90 pp more efficient
Power density 227.7 Wp/m² 236.9 Wp/m² 9.3 Wp/m² higher
Rated power 615 Wp 640 Wp 25 W more power
Weight per kWp 53.7 kg/kWp 51.6 kg/kWp 2.1 kg/kWp lighter
Open-circuit voltage 48.29 V 49.30 V 1.01 V apart
Voltage at max power 39.97 V 41.06 V 1.09 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.
615
20,634 kWh
640
21,473 kWh
Lifetime gap
839 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 615 640
Standard test conditions 25 °C 100.0% of rated power 615 W 640 W
Cool, bright day 40 °C 95.7% of rated power 588 W 612 W
Typical summer roof 55 °C 91.3% of rated power 561 W 584 W
Hot roof 70 °C 87.0% of rated power 535 W 556 W
03

Full specification

Parameter 615 640 Difference
Power and efficiency
Rated power 615 Wp 640 Wp +25 W for 640
Module efficiency 22.80 % 23.70 % +0.90 pp for 640
Power density 227.7 Wp/m² 236.9 Wp/m² +9.3 Wp/m² for 640
Open-circuit voltage 48.29 V 49.30 V 1.01 V apart
Voltage at max power 39.97 V 41.06 V 1.09 V apart
Short-circuit current 16.20 A 16.51 A Effectively the same
Current at max power 15.39 A 15.60 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 33.0 kg 33.0 kg Same
Weight per kWp 53.7 kg/kWp 51.6 kg/kWp -2.1 kg/kWp for 640
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 Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#2,714 vs #517
640 leads by 2,197 places
Power density
#3,077 vs #521
640 leads by 2,556 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#7,656 vs #4,940
640 leads by 2,716 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#2,894 vs #1,540
640 leads by 1,354 places
05

More useful comparisons

Open the full database
Same series, other bin
Trina Solar TSM-NEG19RC.70-615 vs Trina Solar TSM-NEG19RC.70-635
3 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-NEG19RC.70-615 vs Trina Solar TSM-NEG19RC.70-630
3 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-NEG19RC.70-615 vs Trina Solar TSM-NEG19RC.70-625
3 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-NEG19RC.70-615 vs Trina Solar TSM-NEG19RC.70-620
One difference: module efficiency
Same manufacturer
Trina Solar TSM-NEG19RC.70-615 vs Trina Solar TSM-NEG21C.20Q-760
14 differences, the largest is module efficiency
Same manufacturer
Trina Solar TSM-NEG19RC.70-615 vs Trina Solar TSM-NEG21C.20Q-755
14 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Trina Solar TSM-NEG19RC.70-615 or Trina Solar TSM-NEG19RC.70-640?
According to our database: Trina Solar TSM-NEG19RC.70-640 has higher module efficiency (23.70% vs 22.80%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Trina Solar TSM-NEG19RC.70-615 and Trina Solar TSM-NEG19RC.70-640?
Trina Solar TSM-NEG19RC.70-615 has a module efficiency of 22.80%, while Trina Solar TSM-NEG19RC.70-640 is 23.70%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Trina Solar TSM-NEG19RC.70-615 use vs Trina Solar TSM-NEG19RC.70-640?
Trina Solar TSM-NEG19RC.70-615 uses TOPCon cells; Trina Solar TSM-NEG19RC.70-640 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-NEG19RC.70-615 and Trina Solar TSM-NEG19RC.70-640?
Trina Solar TSM-NEG19RC.70-615 has a 30 years power warranty; Trina Solar TSM-NEG19RC.70-640 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-NEG19RC.70-615 and Trina Solar TSM-NEG19RC.70-640 bifacial panels?
Both Trina Solar TSM-NEG19RC.70-615 and Trina Solar TSM-NEG19RC.70-640 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.

Shop prices: See 250 Trina 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.