Trina Solar TSM-NEG18R.20-520 vs Trina Solar TSM-NEG18R.20-515
VS
The verdict
520 leads on the differences that matter
The largest is module efficiency: 0.20 pp more efficient. 18 of 19 comparable parameters are identical.
See the one differenceHow alike are they
18
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
1 of 19 parameters
What actually differs
Parameter
520
515
Difference
Module efficiency
23.40 %
23.20 %
0.20 pp more efficient
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.
520
17,447 kWh
515
17,279 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
520
515
Standard test conditions
25 °C
100.0% of rated power
520 W
515 W
Cool, bright day
40 °C
95.7% of rated power
497 W
493 W
Typical summer roof
55 °C
91.3% of rated power
475 W
470 W
Hot roof
70 °C
87.0% of rated power
452 W
448 W
03
Full specification
Parameter
520
515
Difference
Power and efficiency
Rated power
520 Wp
515 Wp
Effectively the same
Module efficiency
23.40 %
23.20 %
+0.20 pp for 520
Power density
233.8 Wp/m²
231.6 Wp/m²
Effectively the same
Open-circuit voltage
41.20 V
40.90 V
Effectively the same
Voltage at max power
34.10 V
33.90 V
Effectively the same
Short-circuit current
15.99 A
15.96 A
Effectively the same
Current at max power
15.25 A
15.20 A
Effectively the same
Temperature
Temperature coefficient
-0.290 %/°C
-0.290 %/°C
Same
Mechanical
Dimensions
1961x1134x30 mm
1961x1134x30 mm
Same
Module area
2.224 m²
2.224 m²
Same
Weight
23.5 kg
23.5 kg
Same
Weight per kWp
45.2 kg/kWp
45.6 kg/kWp
Effectively the same
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
108
108
Same
Bifacial
No
No
Same
04
14,005 panels
Against the whole database
Efficiency
#882
vs
#1,306
520 leads by 424 places
Power density
#909
vs
#1,473
520 leads by 564 places
Heat behaviour
#2,165
vs
#2,165
Tied - the same position in the database
Weight
#635
vs
#789
520 leads by 154 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#4,727
vs
#5,086
520 leads by 359 places
05
Open the full database
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06
Written summary
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07
Questions about this pairing
Which panel is better: Trina Solar TSM-NEG18R.20-520 or Trina Solar TSM-NEG18R.20-515?
According to our database: Trina Solar TSM-NEG18R.20-520 has higher module efficiency (23.40% vs 23.20%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Trina Solar TSM-NEG18R.20-520 and Trina Solar TSM-NEG18R.20-515?
Trina Solar TSM-NEG18R.20-520 has a module efficiency of 23.40%, while Trina Solar TSM-NEG18R.20-515 is 23.20%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Trina Solar TSM-NEG18R.20-520 use vs Trina Solar TSM-NEG18R.20-515?
Trina Solar TSM-NEG18R.20-520 uses TOPCon cells; Trina Solar TSM-NEG18R.20-515 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-NEG18R.20-520 and Trina Solar TSM-NEG18R.20-515?
Trina Solar TSM-NEG18R.20-520 has a 30 years power warranty; Trina Solar TSM-NEG18R.20-515 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.
Shop prices: See 248 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.