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505 vs 515 16 of 19 identical Swap Change panels

Trina Solar TSM-NEG18RC.27-505 vs Trina Solar TSM-NEG18RC.27-515

Trina Solar TSM-NEG18RC.27-505
TSM-NEG18RC.27-505
505 Wp 22.70 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Trina Solar TSM-NEG18RC.27-515
TSM-NEG18RC.27-515
515 Wp 23.20 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

515 leads on the differences that matter

The largest is module efficiency: 0.50 pp more efficient. 16 of 19 comparable parameters are identical.

See all 3 differences
How alike are they
16 of 19 comparable
parameters are identical
identical differs
01

What actually differs

3 of 19 parameters
Parameter 505 515 Difference
Module efficiency 22.70 % 23.20 % 0.50 pp more efficient
Power density 227.1 Wp/m² 231.6 Wp/m² 4.5 Wp/m² higher
Rated power 505 Wp 515 Wp 10 W more power
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.
505
16,944 kWh
515
17,279 kWh
Lifetime gap
335 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 505 515
Standard test conditions 25 °C 100.0% of rated power 505 W 515 W
Cool, bright day 40 °C 95.7% of rated power 483 W 493 W
Typical summer roof 55 °C 91.3% of rated power 461 W 470 W
Hot roof 70 °C 87.0% of rated power 439 W 448 W
03

Full specification

Parameter 505 515 Difference
Power and efficiency
Rated power 505 Wp 515 Wp +10 W for 515
Module efficiency 22.70 % 23.20 % +0.50 pp for 515
Power density 227.1 Wp/m² 231.6 Wp/m² +4.5 Wp/m² for 515
Open-circuit voltage 40.30 V 40.90 V Effectively the same
Voltage at max power 33.50 V 33.90 V Effectively the same
Short-circuit current 15.89 A 15.96 A Effectively the same
Current at max power 15.09 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 46.5 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 Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#3,307 vs #1,306
515 leads by 2,001 places
Power density
#3,312 vs #1,473
515 leads by 1,839 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#1,199 vs #789
515 leads by 410 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#6,023 vs #5,086
515 leads by 937 places
05

More useful comparisons

Open the full database
Same series, other bin
Trina Solar TSM-NEG18RC.27-505 vs Trina Solar TSM-NEG18RC.27-510
One difference: module efficiency
Same series, other bin
Trina Solar TSM-NEG18RC.27-505 vs Trina Solar TSM-NEG18RC.27-500
One difference: module efficiency
Same series, other bin
Trina Solar TSM-NEG18RC.27-505 vs Trina Solar TSM-NEG18RC.27-495
3 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-NEG18RC.27-505 vs Trina Solar TSM-NEG18RC.27-490
3 differences, the largest is module efficiency
Same manufacturer
Trina Solar TSM-NEG18RC.27-505 vs Trina Solar TSM-NEG21C.20Q-760
15 differences, the largest is module efficiency
Same manufacturer
Trina Solar TSM-NEG18RC.27-505 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-NEG18RC.27-505 or Trina Solar TSM-NEG18RC.27-515?
According to our database: Trina Solar TSM-NEG18RC.27-515 has higher module efficiency (23.20% vs 22.70%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Trina Solar TSM-NEG18RC.27-505 and Trina Solar TSM-NEG18RC.27-515?
Trina Solar TSM-NEG18RC.27-505 has a module efficiency of 22.70%, while Trina Solar TSM-NEG18RC.27-515 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-NEG18RC.27-505 use vs Trina Solar TSM-NEG18RC.27-515?
Trina Solar TSM-NEG18RC.27-505 uses TOPCon cells; Trina Solar TSM-NEG18RC.27-515 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-NEG18RC.27-505 and Trina Solar TSM-NEG18RC.27-515?
Trina Solar TSM-NEG18RC.27-505 has a 30 years power warranty; Trina Solar TSM-NEG18RC.27-515 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.
Are Trina Solar TSM-NEG18RC.27-505 and Trina Solar TSM-NEG18RC.27-515 bifacial panels?
Both Trina Solar TSM-NEG18RC.27-505 and Trina Solar TSM-NEG18RC.27-515 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 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.