JA Solar JAM54D40-465/LR vs Tongwei TWMNH-48HW470
VS
The verdict
9 differences, and they point both ways
The largest is open-circuit voltage: 3.65 V apart. 10 of 19 comparable parameters are identical.
See all 9 differencesHow alike are they
10
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
9 of 19 parameters
What actually differs
Parameter
JAM54D40-465/LR
TWMNH-48HW470
Difference
Open-circuit voltage
40.20 V
36.55 V
3.65 V apart
Short-circuit current
14.65 A
15.95 A
1.30 A apart
Weight
22.0 kg
23.7 kg
1.7 kg lighter
Module efficiency
23.30 %
23.50 %
0.20 pp more efficient
Temperature coefficient
-0.290 %/°C
-0.280 %/°C
0.010 %/°C better in heat
Weight per kWp
47.3 kg/kWp
50.4 kg/kWp
3.1 kg/kWp lighter
Cell count
108
96
12 cells apart
Current at max power
13.88 A
15.26 A
1.38 A apart
Voltage at max power
33.50 V
30.80 V
2.70 V apart
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
JAM54D40-465/LR
15,602 kWh
TWMNH-48HW470
15,769 kWh
Lifetime gap
167 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
JAM54D40-465/LR
TWMNH-48HW470
Standard test conditions
25 °C
100.0% of rated power
465 W
470 W
Cool, bright day
40 °C
95.7% of rated power
445 W
450 W
Typical summer roof
55 °C
91.3% of rated power
425 W
431 W
Hot roof
70 °C
87.0% of rated power
404 W
411 W
03
Full specification
Parameter
JAM54D40-465/LR
TWMNH-48HW470
Difference
Power and efficiency
Rated power
465 Wp
470 Wp
Effectively the same
Module efficiency
23.30 %
23.50 %
+0.20 pp for TWMNH-48HW470
Power density
232.7 Wp/m²
235.2 Wp/m²
Effectively the same
Open-circuit voltage
40.20 V
36.55 V
3.65 V apart
Voltage at max power
33.50 V
30.80 V
2.70 V apart
Short-circuit current
14.65 A
15.95 A
1.30 A apart
Current at max power
13.88 A
15.26 A
1.38 A apart
Temperature
Temperature coefficient
-0.290 %/°C
-0.280 %/°C
+0.010 %/°C for TWMNH-48HW470
Mechanical
Dimensions
1762x1134x30 mm
1762x1134x30 mm
Same
Module area
1.998 m²
1.998 m²
Same
Weight
22.0 kg
23.7 kg
-1.7 kg for JAM54D40-465/LR
Weight per kWp
47.3 kg/kWp
50.4 kg/kWp
-3.1 kg/kWp for JAM54D40-465/LR
Warranty and degradation
Product warranty
15 yrs
15 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.40 %/yr
0.40 %/yr
Same
Technology
Cell technology
N-type
N-type
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
108
96
12 cells apart
Bifacial
No
No
Same
04
14,005 panels
Against the whole database
Efficiency
#1,017
vs
#716
TWMNH-48HW470 leads by 301 places
Power density
#1,115
vs
#674
TWMNH-48HW470 leads by 441 places
Heat behaviour
#2,165
vs
#1,309
TWMNH-48HW470 leads by 856 places
Weight
#1,632
vs
#3,804
JAM54D40-465/LR leads by 2,172 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#6,780
vs
#6,415
TWMNH-48HW470 leads by 365 places
05
Open the full database
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06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: JA Solar JAM54D40-465/LR or Tongwei TWMNH-48HW470?
According to our database: Tongwei TWMNH-48HW470 has higher module efficiency (23.50% vs 23.30%); Tongwei TWMNH-48HW470 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 JA Solar JAM54D40-465/LR and Tongwei TWMNH-48HW470?
JA Solar JAM54D40-465/LR has a module efficiency of 23.30%, while Tongwei TWMNH-48HW470 is 23.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAM54D40-465/LR use vs Tongwei TWMNH-48HW470?
JA Solar JAM54D40-465/LR uses N-type cells; Tongwei TWMNH-48HW470 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 JA Solar JAM54D40-465/LR and Tongwei TWMNH-48HW470?
JA Solar JAM54D40-465/LR has a 30 years power warranty; Tongwei TWMNH-48HW470 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.
Shop prices: See 391 JA Solar offers · See 72 Tongwei 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.