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GR505 vs GR515 16 of 19 identical Swap Change panels

TCL Zhonghuan HSM-ND54-GR505 vs TCL Zhonghuan HSM-ND54-GR515

TCL Zhonghuan
HSM-ND54-GR505
505 Wp 22.70 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
TCL Zhonghuan
HSM-ND54-GR515
515 Wp 23.20 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

GR515 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 GR505 GR515 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.
GR505
16,944 kWh
GR515
17,279 kWh
Lifetime gap
335 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario GR505 GR515
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 GR505 GR515 Difference
Power and efficiency
Rated power 505 Wp 515 Wp +10 W for GR515
Module efficiency 22.70 % 23.20 % +0.50 pp for GR515
Power density 227.1 Wp/m² 231.6 Wp/m² +4.5 Wp/m² for GR515
Open-circuit voltage 40.14 V 40.58 V Effectively the same
Voltage at max power 33.90 V 34.30 V Effectively the same
Short-circuit current 15.88 A 16.02 A Effectively the same
Current at max power 14.90 A 15.03 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 27.0 kg 27.0 kg Same
Weight per kWp 53.5 kg/kWp 52.4 kg/kWp Effectively the same
Warranty and degradation
Product warranty 25 yrs 25 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
GR515 leads by 2,001 places
Power density
#3,312 vs #1,473
GR515 leads by 1,839 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#7,409 vs #5,919
GR515 leads by 1,490 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#4,152 vs #3,194
GR515 leads by 958 places
05

More useful comparisons

Open the full database
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TCL Zhonghuan HSM-ND54-GR505 vs TCL Zhonghuan HSM-ND54-GR500
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13 differences, the largest is rated power
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TCL Zhonghuan HSM-ND54-GR505 vs TCL Zhonghuan HSM-ND66-GK725
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06

Written summary

07

Questions about this pairing

Which panel is better: TCL Zhonghuan HSM-ND54-GR505 or TCL Zhonghuan HSM-ND54-GR515?
According to our database: TCL Zhonghuan HSM-ND54-GR515 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 TCL Zhonghuan HSM-ND54-GR505 and TCL Zhonghuan HSM-ND54-GR515?
TCL Zhonghuan HSM-ND54-GR505 has a module efficiency of 22.70%, while TCL Zhonghuan HSM-ND54-GR515 is 23.20%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does TCL Zhonghuan HSM-ND54-GR505 use vs TCL Zhonghuan HSM-ND54-GR515?
TCL Zhonghuan HSM-ND54-GR505 uses TOPCon cells; TCL Zhonghuan HSM-ND54-GR515 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 TCL Zhonghuan HSM-ND54-GR505 and TCL Zhonghuan HSM-ND54-GR515?
TCL Zhonghuan HSM-ND54-GR505 has a 30 years power warranty; TCL Zhonghuan HSM-ND54-GR515 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 TCL Zhonghuan HSM-ND54-GR505 and TCL Zhonghuan HSM-ND54-GR515 bifacial panels?
Both TCL Zhonghuan HSM-ND54-GR505 and TCL Zhonghuan HSM-ND54-GR515 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 25 TCL Zhonghuan 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.