TCL Zhonghuan HSM-ND54-GR505 vs TCL Zhonghuan HSM-ND66-GK725
VS
The verdict
ND66-GK725 leads on the differences that matter
The largest is rated power: 220 W more power. 5 of 19 comparable parameters are identical.
See all 14 differencesHow alike are they
5
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
14 of 19 parameters
What actually differs
Parameter
ND54-GR505
ND66-GK725
Difference
Rated power
505 Wp
725 Wp
220 W more power
Module efficiency
22.70 %
23.30 %
0.60 pp more efficient
Weight
27.0 kg
38.2 kg
11.2 kg lighter
Product warranty
25 yrs
15 yrs
10 yrs longer
Power density
227.1 Wp/m²
233.4 Wp/m²
6.3 Wp/m² higher
Open-circuit voltage
40.14 V
49.36 V
9.22 V apart
Short-circuit current
15.88 A
18.60 A
2.72 A apart
Module area
2.224 m²
3.106 m²
0.883 m² apart
Cell technology
TOPCon
N-type
TOPCon vs N-type
Temperature coefficient
-0.290 %/°C
-0.280 %/°C
0.010 %/°C better in heat
Voltage at max power
33.90 V
41.27 V
7.37 V apart
Current at max power
14.90 A
17.57 A
2.67 A apart
Cell count
108
132
24 cells apart
Dimensions
1961x1134x30 mm
2384x1303x33 mm
1961x1134x30 mm vs 2384x1303x33 mm
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
ND54-GR505
16,944 kWh
ND66-GK725
24,325 kWh
Lifetime gap
7,381 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
ND54-GR505
ND66-GK725
Standard test conditions
25 °C
100.0% of rated power
505 W
725 W
Cool, bright day
40 °C
95.7% of rated power
483 W
695 W
Typical summer roof
55 °C
91.3% of rated power
461 W
664 W
Hot roof
70 °C
87.0% of rated power
439 W
634 W
03
Full specification
Parameter
ND54-GR505
ND66-GK725
Difference
Power and efficiency
Rated power
505 Wp
725 Wp
+220 W for ND66-GK725
Module efficiency
22.70 %
23.30 %
+0.60 pp for ND66-GK725
Power density
227.1 Wp/m²
233.4 Wp/m²
+6.3 Wp/m² for ND66-GK725
Open-circuit voltage
40.14 V
49.36 V
9.22 V apart
Voltage at max power
33.90 V
41.27 V
7.37 V apart
Short-circuit current
15.88 A
18.60 A
2.72 A apart
Current at max power
14.90 A
17.57 A
2.67 A apart
Temperature
Temperature coefficient
-0.290 %/°C
-0.280 %/°C
+0.010 %/°C for ND66-GK725
Mechanical
Dimensions
1961x1134x30 mm
2384x1303x33 mm
1961x1134x30 mm vs 2384x1303x33 mm
Module area
2.224 m²
3.106 m²
0.883 m² apart
Weight
27.0 kg
38.2 kg
-11.2 kg for ND54-GR505
Weight per kWp
53.5 kg/kWp
52.7 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
25 yrs
15 yrs
+10 yrs for ND54-GR505
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.40 %/yr
0.40 %/yr
Same
Technology
Cell technology
TOPCon
N-type
TOPCon vs N-type
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
108
132
24 cells apart
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#3,307
vs
#1,017
ND66-GK725 leads by 2,290 places
Power density
#3,312
vs
#936
ND66-GK725 leads by 2,376 places
Heat behaviour
#2,165
vs
#1,309
ND66-GK725 leads by 856 places
Weight
#7,409
vs
#6,337
ND66-GK725 leads by 1,072 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#4,152
vs
#266
ND66-GK725 leads by 3,886 places
05
Open the full database
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TCL Zhonghuan HSM-ND66-GK725 vs TCL Zhonghuan HSM-ND66-GK720
The same specification on paper
06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: TCL Zhonghuan HSM-ND54-GR505 or TCL Zhonghuan HSM-ND66-GK725?
According to our database: TCL Zhonghuan HSM-ND66-GK725 has higher module efficiency (23.30% vs 22.70%); TCL Zhonghuan HSM-ND66-GK725 tolerates heat better (temp coeff -0.280%/°C vs -0.290%/°C). 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-ND66-GK725?
TCL Zhonghuan HSM-ND54-GR505 has a module efficiency of 22.70%, while TCL Zhonghuan HSM-ND66-GK725 is 23.30%. 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-ND66-GK725?
TCL Zhonghuan HSM-ND54-GR505 uses TOPCon cells; TCL Zhonghuan HSM-ND66-GK725 uses N-type. 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-ND66-GK725?
TCL Zhonghuan HSM-ND54-GR505 has a 30 years power warranty; TCL Zhonghuan HSM-ND66-GK725 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-ND66-GK725 bifacial panels?
Both TCL Zhonghuan HSM-ND54-GR505 and TCL Zhonghuan HSM-ND66-GK725 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.