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ND48-GR435 vs ND66-GK725 4 of 19 identical Swap Change panels

TCL Zhonghuan HSM-ND48-GR435 vs TCL Zhonghuan HSM-ND66-GK725

TCL Zhonghuan
HSM-ND48-GR435
435 Wp 21.80 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
TCL Zhonghuan
HSM-ND66-GK725
725 Wp 23.30 % N-type Bifacial
Open panel page Datasheet PDF
The verdict

ND66-GK725 leads on the differences that matter

The largest is module efficiency: 1.50 pp more efficient. 4 of 19 comparable parameters are identical.

See all 15 differences
How alike are they
4 of 19 comparable
parameters are identical
identical differs
01

What actually differs

15 of 19 parameters
Parameter ND48-GR435 ND66-GK725 Difference
Module efficiency 21.80 % 23.30 % 1.50 pp more efficient
Rated power 435 Wp 725 Wp 290 W more power
Power density 217.7 Wp/m² 233.4 Wp/m² 15.7 Wp/m² higher
Weight 24.5 kg 38.2 kg 13.7 kg lighter
Product warranty 25 yrs 15 yrs 10 yrs longer
Open-circuit voltage 34.96 V 49.36 V 14.40 V apart
Short-circuit current 15.85 A 18.60 A 2.75 A apart
Module area 1.998 m² 3.106 m² 1.108 m² apart
Weight per kWp 56.3 kg/kWp 52.7 kg/kWp 3.6 kg/kWp lighter
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 29.54 V 41.27 V 11.73 V apart
Current at max power 14.73 A 17.57 A 2.84 A apart
Cell count 96 132 36 cells apart
Dimensions 1762x1134x30 mm 2384x1303x33 mm 1762x1134x30 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
ND48-GR435
14,595 kWh
ND66-GK725
24,325 kWh
Lifetime gap
9,730 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario ND48-GR435 ND66-GK725
Standard test conditions 25 °C 100.0% of rated power 435 W 725 W
Cool, bright day 40 °C 95.7% of rated power 416 W 695 W
Typical summer roof 55 °C 91.3% of rated power 397 W 664 W
Hot roof 70 °C 87.0% of rated power 378 W 634 W
03

Full specification

Parameter ND48-GR435 ND66-GK725 Difference
Power and efficiency
Rated power 435 Wp 725 Wp +290 W for ND66-GK725
Module efficiency 21.80 % 23.30 % +1.50 pp for ND66-GK725
Power density 217.7 Wp/m² 233.4 Wp/m² +15.7 Wp/m² for ND66-GK725
Open-circuit voltage 34.96 V 49.36 V 14.40 V apart
Voltage at max power 29.54 V 41.27 V 11.73 V apart
Short-circuit current 15.85 A 18.60 A 2.75 A apart
Current at max power 14.73 A 17.57 A 2.84 A apart
Temperature
Temperature coefficient -0.290 %/°C -0.280 %/°C +0.010 %/°C for ND66-GK725
Mechanical
Dimensions 1762x1134x30 mm 2384x1303x33 mm 1762x1134x30 mm vs 2384x1303x33 mm
Module area 1.998 m² 3.106 m² 1.108 m² apart
Weight 24.5 kg 38.2 kg -13.7 kg for ND48-GR435
Weight per kWp 56.3 kg/kWp 52.7 kg/kWp -3.6 kg/kWp for ND66-GK725
Warranty and degradation
Product warranty 25 yrs 15 yrs +10 yrs for ND48-GR435
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 96 132 36 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#7,022 vs #1,017
ND66-GK725 leads by 6,005 places
Power density
#7,066 vs #936
ND66-GK725 leads by 6,130 places
Heat behaviour
#2,165 vs #1,309
ND66-GK725 leads by 856 places
Weight
#10,568 vs #6,337
ND66-GK725 leads by 4,231 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#7,707 vs #266
ND66-GK725 leads by 7,441 places
05

More useful comparisons

Open the full database
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TCL Zhonghuan HSM-ND48-GR435 vs TCL Zhonghuan HSM-ND48-GR455
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TCL Zhonghuan HSM-ND48-GR435 vs TCL Zhonghuan HSM-ND48-GR450
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TCL Zhonghuan HSM-ND48-GR435 vs TCL Zhonghuan HSM-ND48-GR445
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TCL Zhonghuan HSM-ND48-GR435 vs TCL Zhonghuan HSM-ND48-GR440
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TCL Zhonghuan HSM-ND66-GK725 vs TCL Zhonghuan HSM-ND66-GK720
The same specification on paper
Same series, other bin
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TCL Zhonghuan HSM-ND66-GK725 vs TCL Zhonghuan HSM-ND66-GK715
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: TCL Zhonghuan HSM-ND48-GR435 or TCL Zhonghuan HSM-ND66-GK725?
According to our database: TCL Zhonghuan HSM-ND66-GK725 has higher module efficiency (23.30% vs 21.80%); 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-ND48-GR435 and TCL Zhonghuan HSM-ND66-GK725?
TCL Zhonghuan HSM-ND48-GR435 has a module efficiency of 21.80%, 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-ND48-GR435 use vs TCL Zhonghuan HSM-ND66-GK725?
TCL Zhonghuan HSM-ND48-GR435 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-ND48-GR435 and TCL Zhonghuan HSM-ND66-GK725?
TCL Zhonghuan HSM-ND48-GR435 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-ND48-GR435 and TCL Zhonghuan HSM-ND66-GK725 bifacial panels?
Both TCL Zhonghuan HSM-ND48-GR435 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.