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JKM710-735N-66HL5-BDV-Z3-EU (735W bin) vs GK-4-78HGBD-780M 4 of 19 identical Swap Change panels

Jinko Solar JKM710-735N-66HL5-BDV-Z3-EU (735W bin) vs Gokin GK-4-78HGBD-780M

Jinko Solar JKM710-735N-66HL5-BDV-Z3-EU (735W bin)
JKM710-735N-66HL5-BDV-Z3-EU (735W bin)
735 Wp 23.66 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Gokin GK-4-78HGBD-780M
Gokin
GK-4-78HGBD-780M
780 Wp 24.30 % Back Contact Bifacial
Open panel page Datasheet PDF
The verdict

GK-4-78HGBD-780M leads on the differences that matter

The largest is module efficiency: 0.64 pp more efficient. 4 of 19 comparable parameters are identical.

See all 15 differences
How alike are they
4 of 19 comparable
parameters are identical
identical differs
01

What actually differs

15 of 19 parameters
Parameter JKM710-735N-66HL5-BDV-Z3-EU (735W bin) GK-4-78HGBD-780M Difference
Module efficiency 23.66 % 24.30 % 0.64 pp more efficient
Rated power 735 Wp 780 Wp 45 W more power
Temperature coefficient -0.290 %/°C -0.260 %/°C 0.030 %/°C better in heat
Product warranty 12 yrs 15 yrs 3 yrs longer
Power density 236.6 Wp/m² 242.8 Wp/m² 6.2 Wp/m² higher
Open-circuit voltage 49.52 V 58.92 V 9.40 V apart
Short-circuit current 18.88 A 16.78 A 2.10 A apart
Module area 3.106 m² 3.212 m² 0.106 m² apart
Cell technology TOPCon Back Contact TOPCon vs Back Contact
Annual degradation 0.40 %/yr 0.35 %/yr 0.05 %/yr slower
Voltage at max power 41.23 V 48.97 V 7.74 V apart
Cell count 132 156 24 cells apart
Current at max power 17.83 A 15.93 A 1.90 A apart
Weight 37.5 kg 38.7 kg 1.2 kg lighter
Dimensions 2384x1303x33 mm 2465x1303x33 mm 2384x1303x33 mm vs 2465x1303x33 mm
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
JKM710-735N-66HL5-BDV-Z3-EU (735W bin)
24,661 kWh
GK-4-78HGBD-780M
26,374 kWh
Lifetime gap
1,713 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario JKM710-735N-66HL5-BDV-Z3-EU (735W bin) GK-4-78HGBD-780M
Standard test conditions 25 °C 100.0% of rated power 735 W 780 W
Cool, bright day 40 °C 95.7% of rated power 703 W 750 W
Typical summer roof 55 °C 91.3% of rated power 671 W 719 W
Hot roof 70 °C 87.0% of rated power 639 W 689 W
03

Full specification

Parameter JKM710-735N-66HL5-BDV-Z3-EU (735W bin) GK-4-78HGBD-780M Difference
Power and efficiency
Rated power 735 Wp 780 Wp +45 W for GK-4-78HGBD-780M
Module efficiency 23.66 % 24.30 % +0.64 pp for GK-4-78HGBD-780M
Power density 236.6 Wp/m² 242.8 Wp/m² +6.2 Wp/m² for GK-4-78HGBD-780M
Open-circuit voltage 49.52 V 58.92 V 9.40 V apart
Voltage at max power 41.23 V 48.97 V 7.74 V apart
Short-circuit current 18.88 A 16.78 A 2.10 A apart
Current at max power 17.83 A 15.93 A 1.90 A apart
Temperature
Temperature coefficient -0.290 %/°C -0.260 %/°C +0.030 %/°C for GK-4-78HGBD-780M
Mechanical
Dimensions 2384x1303x33 mm 2465x1303x33 mm 2384x1303x33 mm vs 2465x1303x33 mm
Module area 3.106 m² 3.212 m² 0.106 m² apart
Weight 37.5 kg 38.7 kg -1.2 kg for JKM710-735N-66HL5-BDV-Z3-EU (735W bin)
Weight per kWp 51.0 kg/kWp 49.6 kg/kWp Effectively the same
Warranty and degradation
Product warranty 12 yrs 15 yrs +3 yrs for GK-4-78HGBD-780M
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.35 %/yr -0.05 %/yr for GK-4-78HGBD-780M
Technology
Cell technology TOPCon Back Contact TOPCon vs Back Contact
Cell type Monocrystalline Monocrystalline Same
Cell count 132 156 24 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#602 vs #131
GK-4-78HGBD-780M leads by 471 places
Power density
#582 vs #138
GK-4-78HGBD-780M leads by 444 places
Heat behaviour
#2,165 vs #511
GK-4-78HGBD-780M leads by 1,654 places
Weight
#4,360 vs #3,161
GK-4-78HGBD-780M leads by 1,199 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#239 vs #15
GK-4-78HGBD-780M leads by 224 places
05

More useful comparisons

Open the full database
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Jinko Solar JKM710-735N-66HL5-BDV-Z3-EU (735W bin) vs Jinko Solar JKM730N-66HL5-BDV-Z3-EU
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Jinko Solar JKM710-735N-66HL5-BDV-Z3-EU (735W bin) vs Jinko Solar JKM730N-66HL5-BDV-Z6-EU
The same specification on paper
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Jinko Solar JKM710-735N-66HL5-BDV-Z3-EU (735W bin) vs Jinko Solar JKM710-735N-66HL5-BDV-Z3-EU (725W bin)
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Jinko Solar JKM710-735N-66HL5-BDV-Z3-EU (735W bin) or Gokin GK-4-78HGBD-780M?
According to our database: Gokin GK-4-78HGBD-780M has higher module efficiency (24.30% vs 23.66%); Gokin GK-4-78HGBD-780M tolerates heat better (temp coeff -0.260%/°C vs -0.290%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Jinko Solar JKM710-735N-66HL5-BDV-Z3-EU (735W bin) and Gokin GK-4-78HGBD-780M?
Jinko Solar JKM710-735N-66HL5-BDV-Z3-EU (735 W bin) has a module efficiency of 23.66%, while Gokin GK-4-78HGBD-780M is 24.30%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Jinko Solar JKM710-735N-66HL5-BDV-Z3-EU (735W bin) use vs Gokin GK-4-78HGBD-780M?
Jinko Solar JKM710-735N-66HL5-BDV-Z3-EU (735 W bin) uses TOPCon cells; Gokin GK-4-78HGBD-780M uses Back Contact. 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 JKM710-735N-66HL5-BDV-Z3-EU (735W bin) and Gokin GK-4-78HGBD-780M?
Jinko Solar JKM710-735N-66HL5-BDV-Z3-EU (735 W bin) has a 30 years power warranty; Gokin GK-4-78HGBD-780M 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.
Are Jinko Solar JKM710-735N-66HL5-BDV-Z3-EU (735W bin) and Gokin GK-4-78HGBD-780M bifacial panels?
Both Jinko Solar JKM710-735N-66HL5-BDV-Z3-EU (735 W bin) and Gokin GK-4-78HGBD-780M are bifacial - they capture reflected light from the ground, which can add 5-15% more annual energy on ground-mount or elevated rooftop installations with a light surface beneath.
Compare Jinko Solar and Gokin as manufacturers Portfolio, efficiency, cell technologies and warranty terms

Shop prices: See 169 Jinko Solar offers · See 7 Gokin 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.