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JS315P vs JS320P 17 of 18 identical Swap Change panels

Jinko Solar JS315P vs Jinko Solar JS320P

JS315P
315 Wp 16.20 % PERC Incomplete
Open panel page Datasheet PDF
VS
JS320P
320 Wp 16.40 % PERC Incomplete
Open panel page Datasheet PDF
The verdict

JS320P leads on the differences that matter

The largest is module efficiency: 0.20 pp more efficient. 17 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See the one difference
How alike are they
17 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

1 of 18 parameters
Parameter JS315P JS320P Difference
Module efficiency 16.20 % 16.40 % 0.20 pp more efficient
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 (-0.420 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
JS315P
10,569 kWh
JS320P
10,737 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario JS315P JS320P
Standard test conditions 25 °C 100.0% of rated power 315 W 320 W
Cool, bright day 40 °C 93.7% of rated power 295 W 300 W
Typical summer roof 55 °C 87.4% of rated power 275 W 280 W
Hot roof 70 °C 81.1% of rated power 255 W 260 W
03

Full specification

Parameter JS315P JS320P Difference
Power and efficiency
Rated power 315 Wp 320 Wp Effectively the same
Module efficiency 16.20 % 16.40 % +0.20 pp for JS320P
Power density 162.3 Wp/m² 164.9 Wp/m² Effectively the same
Open-circuit voltage 45.61 V 45.91 V Effectively the same
Voltage at max power 36.94 V 37.17 V Effectively the same
Short-circuit current 9.06 A 9.12 A Effectively the same
Current at max power 8.53 A 8.61 A Effectively the same
Temperature
Temperature coefficient -0.420 %/°C -0.420 %/°C Same
Mechanical
Dimensions 1956x992x40 mm 1956x992x40 mm Same
Module area 1.940 m² 1.940 m² Same
Weight 23.5 kg 23.5 kg Same
Weight per kWp 74.6 kg/kWp 73.4 kg/kWp Effectively the same
Warranty and degradation
Product warranty 10 yrs 10 yrs Same
Performance warranty 25 yrs 25 yrs Same
Annual degradation - - Neither datasheet publishes this
Technology
Cell technology PERC PERC Same
Cell type Polycrystalline Polycrystalline Same
Cell count 72 72 Same
Bifacial No No Same
04

Against the whole database

14,005 panels
Efficiency
#13,614 vs #13,584
JS320P leads by 30 places
Power density
#13,601 vs #13,557
JS320P leads by 44 places
Heat behaviour
#13,796 vs #13,796
Tied - the same position in the database
Weight
#13,594 vs #13,558
JS320P leads by 36 places
Warranty
#9,798 vs #9,798
Tied - the same position in the database
Overall
#13,575 vs #13,533
JS320P leads by 42 places
05

More useful comparisons

Open the full database
Same series, other bin
Jinko Solar JS315P vs Jinko Solar JS330P
4 differences, the largest is module efficiency
Same series, other bin
Jinko Solar JS315P vs Jinko Solar JS325P
4 differences, the largest is module efficiency
Same series, other bin
Jinko Solar JS315P vs Jinko Solar JS310P
One difference: module efficiency
Same manufacturer
Jinko Solar JS315P vs Jinko Solar JKM710-735N-66HL5-BDV-Z3-EU (735W bin)
18 differences, the largest is module efficiency
Same manufacturer
Jinko Solar JS315P vs Jinko Solar JKM735N-66HL5-BDV-Z3-EU
18 differences, the largest is module efficiency
Same manufacturer
Jinko Solar JS315P vs Jinko Solar JKM735N-66HL5-BDV-Z6-EU
18 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Jinko Solar JS315P or Jinko Solar JS320P?
According to our database: Jinko Solar JS320P has higher module efficiency (16.40% vs 16.20%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Jinko Solar JS315P and Jinko Solar JS320P?
Jinko Solar JS315P has a module efficiency of 16.20%, while Jinko Solar JS320P is 16.40%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Jinko Solar JS315P use vs Jinko Solar JS320P?
Jinko Solar JS315P uses PERC cells; Jinko Solar JS320P 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 Jinko Solar JS315P and Jinko Solar JS320P?
Jinko Solar JS315P has a 25 years power warranty; Jinko Solar JS320P 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 171 Jinko 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.