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(615W variant) vs (635W variant) 16 of 19 identical Swap Change panels

Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (615W variant) vs Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (635W variant)

JKM615-635N-78HL4-(V)-F6-EN (615W variant)
615 Wp 22.00 % N-type
Open panel page Datasheet PDF
VS
JKM615-635N-78HL4-(V)-F6-EN (635W variant)
635 Wp 22.72 % N-type
Open panel page Datasheet PDF
The verdict

(635W variant) leads on the differences that matter

The largest is module efficiency: 0.72 pp more efficient. 16 of 19 comparable parameters are identical.

See all 3 differences
How alike are they
16 of 19 comparable
parameters are identical
identical differs
01

What actually differs

3 of 19 parameters
Parameter (615W variant) (635W variant) Difference
Module efficiency 22.00 % 22.72 % 0.72 pp more efficient
Power density 220.0 Wp/m² 227.2 Wp/m² 7.2 Wp/m² higher
Rated power 615 Wp 635 Wp 20 W more power
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
Same temp coeff. for both panels (-0.290 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
(615W variant)
20,634 kWh
(635W variant)
21,306 kWh
Lifetime gap
672 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario (615W variant) (635W variant)
Standard test conditions 25 °C 100.0% of rated power 615 W 635 W
Cool, bright day 40 °C 95.7% of rated power 588 W 607 W
Typical summer roof 55 °C 91.3% of rated power 561 W 580 W
Hot roof 70 °C 87.0% of rated power 535 W 552 W
03

Full specification

Parameter (615W variant) (635W variant) Difference
Power and efficiency
Rated power 615 Wp 635 Wp +20 W for (635W variant)
Module efficiency 22.00 % 22.72 % +0.72 pp for (635W variant)
Power density 220.0 Wp/m² 227.2 Wp/m² +7.2 Wp/m² for (635W variant)
Open-circuit voltage 56.25 V 56.85 V Effectively the same
Voltage at max power 46.81 V 47.46 V Effectively the same
Short-circuit current 13.80 A 14.04 A Effectively the same
Current at max power 13.14 A 13.38 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 2465x1134x35 mm 2465x1134x35 mm Same
Module area 2.795 m² 2.795 m² Same
Weight 29.5 kg 29.5 kg Same
Weight per kWp 48.0 kg/kWp 46.5 kg/kWp Effectively the same
Warranty and degradation
Product warranty 12 yrs 12 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 156 156 Same
Bifacial No No Same
04

Against the whole database

14,005 panels
Efficiency
#6,517 vs #3,245
(635W variant) leads by 3,272 places
Power density
#6,655 vs #3,252
(635W variant) leads by 3,403 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#2,001 vs #1,173
(635W variant) leads by 828 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#3,759 vs #2,249
(635W variant) leads by 1,510 places
05

More useful comparisons

Open the full database
Same series, other bin
Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (615W variant) vs Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (630W variant)
3 differences, the largest is module efficiency
Same series, other bin
Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (615W variant) vs Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (625W variant)
3 differences, the largest is module efficiency
Same series, other bin
Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (615W variant) vs Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W variant)
The same specification on paper
Same manufacturer
Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (615W variant) vs Jinko Solar JKM710-735N-66HL5-BDV-Z3-EU (735W bin)
14 differences, the largest is module efficiency
Same manufacturer
Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (615W variant) vs Jinko Solar JKM735N-66HL5-BDV-Z3-EU
14 differences, the largest is module efficiency
Same manufacturer
Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (615W variant) vs Jinko Solar JKM735N-66HL5-BDV-Z6-EU
14 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (615W variant) or Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (635W variant)?
According to our database: Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (635 W variant) has higher module efficiency (22.72% vs 22.00%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (615W variant) and Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (635W variant)?
Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (615 W variant) has a module efficiency of 22.00%, while Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (635 W variant) is 22.72%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (615W variant) use vs Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (635W variant)?
Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (615 W variant) uses N-type cells; Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (635 W variant) 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 Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (615W variant) and Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (635W variant)?
Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (615 W variant) has a 30 years power warranty; Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (635 W variant) 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.

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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.