Tongwei TWMNF-66HD725 vs Huasun RS730S9-132GANT
VS
The verdict
6 differences, and they point both ways
The largest is temperature coefficient: 0.030 %/°C better in heat. 13 of 19 comparable parameters are identical.
See all 6 differencesHow alike are they
13
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
6 of 19 parameters
What actually differs
Parameter
TWMNF-66HD725
RS730S9-132GANT
Difference
Temperature coefficient
-0.280 %/°C
-0.310 %/°C
0.030 %/°C better in heat
Product warranty
12 yrs
15 yrs
3 yrs longer
Module efficiency
23.30 %
23.50 %
0.20 pp more efficient
Short-circuit current
18.60 A
19.19 A
0.59 A apart
Open-circuit voltage
49.45 V
48.40 V
1.05 V apart
Dimensions
2384x1303x33 mm
2384x1303x35 mm
2384x1303x33 mm vs 2384x1303x35 mm
02
What it means on a roof
Thirty years of production
Declared annual degradation, with a 1.0% first-year loss assumed for both panels because at least one datasheet omits it, at 1,200 kWh/kWp a year
TWMNF-66HD725
24,325 kWh
RS730S9-132GANT
24,493 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
TWMNF-66HD725
RS730S9-132GANT
Standard test conditions
25 °C
100.0% of rated power
725 W
730 W
Cool, bright day
40 °C
95.3% of rated power
695 W
696 W
Typical summer roof
55 °C
90.7% of rated power
664 W
662 W
Hot roof
70 °C
86.0% of rated power
634 W
628 W
03
Full specification
Parameter
TWMNF-66HD725
RS730S9-132GANT
Difference
Power and efficiency
Rated power
725 Wp
730 Wp
Effectively the same
Module efficiency
23.30 %
23.50 %
+0.20 pp for RS730S9-132GANT
Power density
233.4 Wp/m²
235.0 Wp/m²
Effectively the same
Open-circuit voltage
49.45 V
48.40 V
1.05 V apart
Voltage at max power
41.20 V
40.47 V
Effectively the same
Short-circuit current
18.60 A
19.19 A
0.59 A apart
Current at max power
17.60 A
18.04 A
Effectively the same
Temperature
Temperature coefficient
-0.280 %/°C
-0.310 %/°C
+0.030 %/°C for TWMNF-66HD725
Mechanical
Dimensions
2384x1303x33 mm
2384x1303x35 mm
2384x1303x33 mm vs 2384x1303x35 mm
Module area
3.106 m²
3.106 m²
Same
Weight
37.9 kg
38.0 kg
Effectively the same
Weight per kWp
52.3 kg/kWp
52.1 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
12 yrs
15 yrs
+3 yrs for RS730S9-132GANT
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
132
132
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#1,017
vs
#716
RS730S9-132GANT leads by 301 places
Power density
#936
vs
#800
RS730S9-132GANT leads by 136 places
Heat behaviour
#1,309
vs
#8,005
TWMNF-66HD725 leads by 6,696 places
Weight
#5,754
vs
#5,495
RS730S9-132GANT leads by 259 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#424
vs
#199
RS730S9-132GANT leads by 225 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: Tongwei TWMNF-66HD725 or Huasun RS730S9-132GANT?
According to our database: Huasun RS730S9-132GANT has higher module efficiency (23.50% vs 23.30%); Tongwei TWMNF-66HD725 tolerates heat better (temp coeff -0.280%/°C vs -0.310%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Tongwei TWMNF-66HD725 and Huasun RS730S9-132GANT?
Tongwei TWMNF-66HD725 has a module efficiency of 23.30%, while Huasun RS730S9-132GANT is 23.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Tongwei TWMNF-66HD725 use vs Huasun RS730S9-132GANT?
Tongwei TWMNF-66HD725 uses TOPCon cells; Huasun RS730S9-132GANT 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 Tongwei TWMNF-66HD725 and Huasun RS730S9-132GANT?
Tongwei TWMNF-66HD725 has a 30 years power warranty; Huasun RS730S9-132GANT 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 Tongwei TWMNF-66HD725 and Huasun RS730S9-132GANT bifacial panels?
Both Tongwei TWMNF-66HD725 and Huasun RS730S9-132GANT 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 72 Tongwei offers · See 4 Huasun 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.