Tongwei TWMNH-48HW470 vs JA Solar JAM54D40-465/LR
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
TWMNH-48HW470
JAM54D40-465/LR
Difference
Open-circuit voltage
36.55 V
40.20 V
3.65 V apart
Short-circuit current
15.95 A
14.65 A
1.30 A apart
Weight
23.7 kg
22.0 kg
1.7 kg lighter
Module efficiency
23.50 %
23.30 %
0.20 pp more efficient
Temperature coefficient
-0.280 %/°C
-0.290 %/°C
0.010 %/°C better in heat
Weight per kWp
50.4 kg/kWp
47.3 kg/kWp
3.1 kg/kWp lighter
Cell count
96
108
12 cells apart
Current at max power
15.26 A
13.88 A
1.38 A apart
Voltage at max power
30.80 V
33.50 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
TWMNH-48HW470
15,769 kWh
JAM54D40-465/LR
15,602 kWh
Lifetime gap
167 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
TWMNH-48HW470
JAM54D40-465/LR
Standard test conditions
25 °C
100.0% of rated power
470 W
465 W
Cool, bright day
40 °C
95.7% of rated power
450 W
445 W
Typical summer roof
55 °C
91.3% of rated power
431 W
425 W
Hot roof
70 °C
87.0% of rated power
411 W
404 W
03
Full specification
Parameter
TWMNH-48HW470
JAM54D40-465/LR
Difference
Power and efficiency
Rated power
470 Wp
465 Wp
Effectively the same
Module efficiency
23.50 %
23.30 %
+0.20 pp for TWMNH-48HW470
Power density
235.2 Wp/m²
232.7 Wp/m²
Effectively the same
Open-circuit voltage
36.55 V
40.20 V
3.65 V apart
Voltage at max power
30.80 V
33.50 V
2.70 V apart
Short-circuit current
15.95 A
14.65 A
1.30 A apart
Current at max power
15.26 A
13.88 A
1.38 A apart
Temperature
Temperature coefficient
-0.280 %/°C
-0.290 %/°C
+0.010 %/°C for TWMNH-48HW470
Mechanical
Dimensions
1762x1134x30 mm
1762x1134x30 mm
Same
Module area
1.998 m²
1.998 m²
Same
Weight
23.7 kg
22.0 kg
-1.7 kg for JAM54D40-465/LR
Weight per kWp
50.4 kg/kWp
47.3 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
96
108
12 cells apart
Bifacial
No
No
Same
04
14,005 panels
Against the whole database
Efficiency
#716
vs
#1,017
TWMNH-48HW470 leads by 301 places
Power density
#674
vs
#1,115
TWMNH-48HW470 leads by 441 places
Heat behaviour
#1,309
vs
#2,165
TWMNH-48HW470 leads by 856 places
Weight
#3,804
vs
#1,632
JAM54D40-465/LR leads by 2,172 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#6,415
vs
#6,780
TWMNH-48HW470 leads by 365 places
05
Open the full database
More useful comparisons
Same series, other bin
Tongwei TWMNH-48HW470 vs Tongwei TWMNH-48HW475
One difference: module efficiency
Same series, other bin
Tongwei TWMNH-48HW470 vs Tongwei TWMNH-48HW465
One difference: module efficiency
Same series, other bin
Tongwei TWMNH-48HW470 vs Tongwei TWMNH-48HW460
3 differences, the largest is module efficiency
Same series, other bin
Tongwei TWMNH-48HW470 vs Tongwei TWMNH-48HW455
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D40-465/LR vs JA Solar JAM54D40-475/LR
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D40-465/LR vs JA Solar JAM54D40-470/LR
One difference: module efficiency
06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: Tongwei TWMNH-48HW470 or JA Solar JAM54D40-465/LR?
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 Tongwei TWMNH-48HW470 and JA Solar JAM54D40-465/LR?
Tongwei TWMNH-48HW470 has a module efficiency of 23.50%, while JA Solar JAM54D40-465/LR is 23.30%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Tongwei TWMNH-48HW470 use vs JA Solar JAM54D40-465/LR?
Tongwei TWMNH-48HW470 uses N-type cells; JA Solar JAM54D40-465/LR 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 TWMNH-48HW470 and JA Solar JAM54D40-465/LR?
Tongwei TWMNH-48HW470 has a 30 years power warranty; JA Solar JAM54D40-465/LR 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 72 Tongwei offers · See 391 JA Solar 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.