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TWMNF-66HD745 vs TWMNH-48HW475 6 of 19 identical Swap Change panels

Tongwei TWMNF-66HD745 vs Tongwei TWMNH-48HW475

Tongwei TWMNF-66HD745
TWMNF-66HD745
745 Wp 24.00 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Tongwei TWMNH-48HW475
TWMNH-48HW475
475 Wp 23.80 % N-type
Open panel page Datasheet PDF
The verdict

13 differences, and they point both ways

The largest is rated power: 270 W more power. 6 of 19 comparable parameters are identical.

See all 13 differences
How alike are they
6 of 19 comparable
parameters are identical
identical differs
01

What actually differs

13 of 19 parameters
Parameter TWMNF-66HD745 TWMNH-48HW475 Difference
Rated power 745 Wp 475 Wp 270 W more power
Weight 37.3 kg 23.7 kg 13.6 kg lighter
Product warranty 12 yrs 15 yrs 3 yrs longer
Open-circuit voltage 49.95 V 36.70 V 13.25 V apart
Short-circuit current 18.87 A 15.97 A 2.90 A apart
Module area 3.106 m² 1.998 m² 1.108 m² apart
Cell technology TOPCon N-type TOPCon vs N-type
Module efficiency 24.00 % 23.80 % 0.20 pp more efficient
Voltage at max power 41.86 V 31.05 V 10.81 V apart
Current at max power 17.80 A 15.30 A 2.50 A apart
Cell count 132 96 36 cells apart
Bifacial Yes No Yes vs No
Dimensions 2384x1303x33 mm 1762x1134x30 mm 2384x1303x33 mm vs 1762x1134x30 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
Same temp coeff. for both panels (-0.280 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
TWMNF-66HD745
24,996 kWh
TWMNH-48HW475
15,937 kWh
Lifetime gap
9,059 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario TWMNF-66HD745 TWMNH-48HW475
Standard test conditions 25 °C 100.0% of rated power 745 W 475 W
Cool, bright day 40 °C 95.8% of rated power 714 W 455 W
Typical summer roof 55 °C 91.6% of rated power 682 W 435 W
Hot roof 70 °C 87.4% of rated power 651 W 415 W
03

Full specification

Parameter TWMNF-66HD745 TWMNH-48HW475 Difference
Power and efficiency
Rated power 745 Wp 475 Wp +270 W for TWMNF-66HD745
Module efficiency 24.00 % 23.80 % +0.20 pp for TWMNF-66HD745
Power density 239.8 Wp/m² 237.7 Wp/m² Effectively the same
Open-circuit voltage 49.95 V 36.70 V 13.25 V apart
Voltage at max power 41.86 V 31.05 V 10.81 V apart
Short-circuit current 18.87 A 15.97 A 2.90 A apart
Current at max power 17.80 A 15.30 A 2.50 A apart
Temperature
Temperature coefficient -0.280 %/°C -0.280 %/°C Same
Mechanical
Dimensions 2384x1303x33 mm 1762x1134x30 mm 2384x1303x33 mm vs 1762x1134x30 mm
Module area 3.106 m² 1.998 m² 1.108 m² apart
Weight 37.3 kg 23.7 kg -13.6 kg for TWMNH-48HW475
Weight per kWp 50.1 kg/kWp 49.9 kg/kWp Effectively the same
Warranty and degradation
Product warranty 12 yrs 15 yrs +3 yrs for TWMNH-48HW475
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 132 96 36 cells apart
Bifacial Yes No Yes vs No
04

Against the whole database

14,005 panels
Efficiency
#303 vs #433
TWMNF-66HD745 leads by 130 places
Power density
#339 vs #467
TWMNF-66HD745 leads by 128 places
Heat behaviour
#1,309 vs #1,309
Tied - the same position in the database
Weight
#3,586 vs #3,274
TWMNH-48HW475 leads by 312 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#148 vs #5,862
TWMNF-66HD745 leads by 5,714 places
05

More useful comparisons

Open the full database
Same series, other bin
Tongwei TWMNF-66HD745 vs Tongwei TWMNF-66HD750
The same specification on paper
Same series, other bin
Tongwei TWMNF-66HD745 vs Tongwei TWMNF-66HD740
One difference: module efficiency
Same series, other bin
Tongwei TWMNF-66HD745 vs Tongwei TWMNF-66HD735
3 differences, the largest is module efficiency
Same series, other bin
Tongwei TWMNF-66HD745 vs Tongwei TWMNF-66HD730
3 differences, the largest is module efficiency
Same series, other bin
Tongwei TWMNH-48HW475 vs Tongwei TWMNH-48HW470
One difference: module efficiency
Same series, other bin
Tongwei TWMNH-48HW475 vs Tongwei TWMNH-48HW465
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Tongwei TWMNF-66HD745 or Tongwei TWMNH-48HW475?
According to our database: Tongwei TWMNF-66HD745 has higher module efficiency (24.00% vs 23.80%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Tongwei TWMNF-66HD745 and Tongwei TWMNH-48HW475?
Tongwei TWMNF-66HD745 has a module efficiency of 24.00%, while Tongwei TWMNH-48HW475 is 23.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Tongwei TWMNF-66HD745 use vs Tongwei TWMNH-48HW475?
Tongwei TWMNF-66HD745 uses TOPCon cells; Tongwei TWMNH-48HW475 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 Tongwei TWMNF-66HD745 and Tongwei TWMNH-48HW475?
Tongwei TWMNF-66HD745 has a 30 years power warranty; Tongwei TWMNH-48HW475 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-66HD745 and Tongwei TWMNH-48HW475 bifacial panels?
Tongwei TWMNF-66HD745 is bifacial (captures light from both faces); Tongwei TWMNH-48HW475 is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

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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.