JA Solar MYM2072-365 vs JA Solar MYM2072-380
VS
The verdict
380 leads on the differences that matter
The largest is module efficiency: 0.77 pp more efficient. 14 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.
See all 4 differencesHow alike are they
14
of 18 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
4 of 18 parameters
What actually differs
Parameter
365
380
Difference
Module efficiency
18.81 %
19.58 %
0.77 pp more efficient
Power density
188.1 Wp/m²
195.8 Wp/m²
7.7 Wp/m² higher
Rated power
365 Wp
380 Wp
15 W more power
Weight per kWp
61.6 kg/kWp
59.2 kg/kWp
2.4 kg/kWp lighter
02
What it means on a roof
Thirty years of production
A 1.0% first-year loss then 0.40% a year, assumed for both panels, at 1,200 kWh/kWp a year
Same temp coeff. for both panels (-0.370 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
365
12,246 kWh
380
12,750 kWh
Lifetime gap
504 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
365
380
Standard test conditions
25 °C
100.0% of rated power
365 W
380 W
Cool, bright day
40 °C
94.5% of rated power
345 W
359 W
Typical summer roof
55 °C
88.9% of rated power
324 W
338 W
Hot roof
70 °C
83.3% of rated power
304 W
317 W
03
Full specification
Parameter
365
380
Difference
Power and efficiency
Rated power
365 Wp
380 Wp
+15 W for 380
Module efficiency
18.81 %
19.58 %
+0.77 pp for 380
Power density
188.1 Wp/m²
195.8 Wp/m²
+7.7 Wp/m² for 380
Open-circuit voltage
48.20 V
48.90 V
Effectively the same
Voltage at max power
39.40 V
40.00 V
Effectively the same
Short-circuit current
9.77 A
10.00 A
Effectively the same
Current at max power
9.26 A
9.50 A
Effectively the same
Temperature
Temperature coefficient
-0.370 %/°C
-0.370 %/°C
Same
Mechanical
Dimensions
1956x992x40 mm
1956x992x40 mm
Same
Module area
1.940 m²
1.940 m²
Same
Weight
22.5 kg
22.5 kg
Same
Weight per kWp
61.6 kg/kWp
59.2 kg/kWp
-2.4 kg/kWp for 380
Warranty and degradation
Product warranty
12 yrs
12 yrs
Same
Performance warranty
25 yrs
25 yrs
Same
Annual degradation
-
-
Neither datasheet publishes this
Technology
Cell technology
PERC
PERC
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
72
72
Same
Bifacial
No
No
Same
04
14,005 panels
Against the whole database
Efficiency
#13,026
vs
#12,623
380 leads by 403 places
Power density
#13,007
vs
#12,595
380 leads by 412 places
Heat behaviour
#13,081
vs
#13,081
Tied - the same position in the database
Weight
#12,666
vs
#12,047
380 leads by 619 places
Warranty
#9,798
vs
#9,798
Tied - the same position in the database
Overall
#12,955
vs
#12,640
380 leads by 315 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: JA Solar MYM2072-365 or JA Solar MYM2072-380?
According to our database: JA Solar MYM2072-380 has higher module efficiency (19.58% vs 18.81%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar MYM2072-365 and JA Solar MYM2072-380?
JA Solar MYM2072-365 has a module efficiency of 18.81%, while JA Solar MYM2072-380 is 19.58%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar MYM2072-365 use vs JA Solar MYM2072-380?
JA Solar MYM2072-365 uses PERC cells; JA Solar MYM2072-380 uses PERC. 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 MYM2072-365 and JA Solar MYM2072-380?
JA Solar MYM2072-365 has a 25 years power warranty; JA Solar MYM2072-380 has a 25 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 390 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.