JA Solar MYM2060-315 vs JA Solar MYM2060-320
VS
The verdict
320 leads on the differences that matter
The largest is module efficiency: 0.31 pp more efficient. 16 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.
See all 2 differencesHow alike are they
16
of 18 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
2 of 18 parameters
What actually differs
Parameter
315
320
Difference
Module efficiency
19.36 %
19.67 %
0.31 pp more efficient
Power density
193.6 Wp/m²
196.7 Wp/m²
3.1 Wp/m² higher
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.
315
10,569 kWh
320
10,737 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
315
320
Standard test conditions
25 °C
100.0% of rated power
315 W
320 W
Cool, bright day
40 °C
94.5% of rated power
298 W
302 W
Typical summer roof
55 °C
88.9% of rated power
280 W
284 W
Hot roof
70 °C
83.3% of rated power
263 W
267 W
03
Full specification
Parameter
315
320
Difference
Power and efficiency
Rated power
315 Wp
320 Wp
Effectively the same
Module efficiency
19.36 %
19.67 %
+0.31 pp for 320
Power density
193.6 Wp/m²
196.7 Wp/m²
+3.1 Wp/m² for 320
Open-circuit voltage
40.70 V
40.90 V
Effectively the same
Voltage at max power
33.10 V
33.30 V
Effectively the same
Short-circuit current
9.96 A
10.10 A
Effectively the same
Current at max power
9.52 A
9.61 A
Effectively the same
Temperature
Temperature coefficient
-0.370 %/°C
-0.370 %/°C
Same
Mechanical
Dimensions
1640x992x40 mm
1640x992x40 mm
Same
Module area
1.627 m²
1.627 m²
Same
Weight
18.5 kg
18.5 kg
Same
Weight per kWp
58.7 kg/kWp
57.8 kg/kWp
Effectively the same
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
60
60
Same
Bifacial
No
No
Same
04
14,005 panels
Against the whole database
Efficiency
#12,774
vs
#12,559
320 leads by 215 places
Power density
#12,748
vs
#12,528
320 leads by 220 places
Heat behaviour
#13,081
vs
#13,081
Tied - the same position in the database
Weight
#11,867
vs
#11,428
320 leads by 439 places
Warranty
#9,798
vs
#9,798
Tied - the same position in the database
Overall
#13,080
vs
#13,005
320 leads by 75 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 MYM2060-315 or JA Solar MYM2060-320?
According to our database: JA Solar MYM2060-320 has higher module efficiency (19.67% vs 19.36%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar MYM2060-315 and JA Solar MYM2060-320?
JA Solar MYM2060-315 has a module efficiency of 19.36%, while JA Solar MYM2060-320 is 19.67%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar MYM2060-315 use vs JA Solar MYM2060-320?
JA Solar MYM2060-315 uses PERC cells; JA Solar MYM2060-320 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 MYM2060-315 and JA Solar MYM2060-320?
JA Solar MYM2060-315 has a 25 years power warranty; JA Solar MYM2060-320 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.