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(635W bin) vs (620W bin) 16 of 19 identical Swap Change panels

Jinko Solar JKM610-635N-66HL4M-(V) (635W bin) vs Jinko Solar JKM610-635N-66HL4M-(V) (620W bin)

Jinko Solar JKM610-635N-66HL4M-(V) (635W bin)
JKM610-635N-66HL4M-(V) (635W bin)
635 Wp 23.51 % TOPCon
Open panel page Datasheet PDF
VS
Jinko Solar JKM610-635N-66HL4M-(V) (620W bin)
JKM610-635N-66HL4M-(V) (620W bin)
620 Wp 22.95 % TOPCon
Open panel page Datasheet PDF
The verdict

(635W bin) leads on the differences that matter

The largest is module efficiency: 0.56 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 (635W bin) (620W bin) Difference
Module efficiency 23.51 % 22.95 % 0.56 pp more efficient
Power density 235.1 Wp/m² 229.5 Wp/m² 5.6 Wp/m² higher
Rated power 635 Wp 620 Wp 15 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.
(635W bin)
21,306 kWh
(620W bin)
20,802 kWh
Lifetime gap
504 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario (635W bin) (620W bin)
Standard test conditions 25 °C 100.0% of rated power 635 W 620 W
Cool, bright day 40 °C 95.7% of rated power 607 W 593 W
Typical summer roof 55 °C 91.3% of rated power 580 W 566 W
Hot roof 70 °C 87.0% of rated power 552 W 539 W
03

Full specification

Parameter (635W bin) (620W bin) Difference
Power and efficiency
Rated power 635 Wp 620 Wp +15 W for (635W bin)
Module efficiency 23.51 % 22.95 % +0.56 pp for (635W bin)
Power density 235.1 Wp/m² 229.5 Wp/m² +5.6 Wp/m² for (635W bin)
Open-circuit voltage 49.43 V 48.95 V Effectively the same
Voltage at max power 41.39 V 40.90 V Effectively the same
Short-circuit current 16.36 A 16.15 A Effectively the same
Current at max power 15.34 A 15.16 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 2382x1134x35 mm 2382x1134x35 mm Same
Module area 2.701 m² 2.701 m² Same
Weight 28.2 kg 28.2 kg Same
Weight per kWp 44.4 kg/kWp 45.5 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 TOPCon TOPCon Same
Cell type Monocrystalline Monocrystalline Same
Cell count 132 132 Same
Bifacial No No Same
04

Against the whole database

14,005 panels
Efficiency
#696 vs #2,268
(635W bin) leads by 1,572 places
Power density
#741 vs #2,191
(635W bin) leads by 1,450 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#445 vs #749
(635W bin) leads by 304 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#1,683 vs #2,491
(635W bin) leads by 808 places
05

More useful comparisons

Open the full database
Same series, other bin
Jinko Solar JKM610-635N-66HL4M-(V) (635W bin) vs Jinko Solar JKM610-635N-66HL4M-(V) (630W bin)
The same specification on paper
Same series, other bin
Jinko Solar JKM610-635N-66HL4M-(V) (635W bin) vs Jinko Solar JKM610-635N-66HL4M-(V) (625W bin)
3 differences, the largest is module efficiency
Same series, other bin
Jinko Solar JKM610-635N-66HL4M-(V) (635W bin) vs Jinko Solar JKM610-635N-66HL4M-(V) (615W bin)
3 differences, the largest is module efficiency
Same series, other bin
Jinko Solar JKM610-635N-66HL4M-(V) (635W bin) vs Jinko Solar JKM610-635N-66HL4M-(V) (610W bin)
3 differences, the largest is module efficiency
Same manufacturer
Jinko Solar JKM610-635N-66HL4M-(V) (635W bin) vs Jinko Solar JKM710-735N-66HL5-BDV-Z3-EU (735W bin)
8 differences, the largest is rated power
Same manufacturer
Jinko Solar JKM610-635N-66HL4M-(V) (635W bin) vs Jinko Solar JKM735N-66HL5-BDV-Z3-EU
8 differences, the largest is rated power
06

Written summary

07

Questions about this pairing

Which panel is better: Jinko Solar JKM610-635N-66HL4M-(V) (635W bin) or Jinko Solar JKM610-635N-66HL4M-(V) (620W bin)?
According to our database: Jinko Solar JKM610-635N-66HL4M-(V) (635 W bin) has higher module efficiency (23.51% vs 22.95%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Jinko Solar JKM610-635N-66HL4M-(V) (635W bin) and Jinko Solar JKM610-635N-66HL4M-(V) (620W bin)?
Jinko Solar JKM610-635N-66HL4M-(V) (635 W bin) has a module efficiency of 23.51%, while Jinko Solar JKM610-635N-66HL4M-(V) (620 W bin) is 22.95%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Jinko Solar JKM610-635N-66HL4M-(V) (635W bin) use vs Jinko Solar JKM610-635N-66HL4M-(V) (620W bin)?
Jinko Solar JKM610-635N-66HL4M-(V) (635 W bin) uses TOPCon cells; Jinko Solar JKM610-635N-66HL4M-(V) (620 W bin) uses TOPCon. 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 JKM610-635N-66HL4M-(V) (635W bin) and Jinko Solar JKM610-635N-66HL4M-(V) (620W bin)?
Jinko Solar JKM610-635N-66HL4M-(V) (635 W bin) has a 30 years power warranty; Jinko Solar JKM610-635N-66HL4M-(V) (620 W bin) 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 176 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.