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JKM670N-66QL6-BDX vs JKM645-670N-66QL6-BDV-L 16 of 19 identical Swap Change panels

Jinko Solar JKM670N-66QL6-BDX vs Jinko Solar JKM645-670N-66QL6-BDV-L

Jinko Solar JKM670N-66QL6-BDX
JKM670N-66QL6-BDX
670 Wp 24.80 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
JKM645-670N-66QL6-BDV-L
670 Wp 24.80 % N-type Bifacial
Open panel page Datasheet PDF
The verdict

JKM645-670N-66QL6-BDV-L leads on the differences that matter

The largest is weight: 6.3 kg lighter. 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 JKM670N-66QL6-BDX JKM645-670N-66QL6-BDV-L Difference
Weight 38.8 kg 32.5 kg 6.3 kg lighter
Weight per kWp 57.9 kg/kWp 48.5 kg/kWp 9.4 kg/kWp lighter
Cell technology TOPCon N-type TOPCon vs N-type
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 (-0.260 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
JKM670N-66QL6-BDX
22,655 kWh
JKM645-670N-66QL6-BDV-L
22,655 kWh
Lifetime gap
No difference
Output when it is hot
Rated power carried across the range a module actually sees
Scenario JKM670N-66QL6-BDX JKM645-670N-66QL6-BDV-L
Standard test conditions 25 °C 100.0% of rated power 670 W 670 W
Cool, bright day 40 °C 96.1% of rated power 644 W 644 W
Typical summer roof 55 °C 92.2% of rated power 618 W 618 W
Hot roof 70 °C 88.3% of rated power 592 W 592 W
03

Full specification

Parameter JKM670N-66QL6-BDX JKM645-670N-66QL6-BDV-L Difference
Power and efficiency
Rated power 670 Wp 670 Wp Same
Module efficiency 24.80 % 24.80 % Same
Power density 248.0 Wp/m² 248.0 Wp/m² Same
Open-circuit voltage 50.60 V 50.60 V Same
Voltage at max power 42.92 V 42.92 V Same
Short-circuit current 16.34 A 16.34 A Same
Current at max power 15.61 A 15.61 A Same
Temperature
Temperature coefficient -0.260 %/°C -0.260 %/°C Same
Mechanical
Dimensions 2382x1134x30 mm 2382x1134x30 mm Same
Module area 2.701 m² 2.701 m² Same
Weight 38.8 kg 32.5 kg -6.3 kg for JKM645-670N-66QL6-BDV-L
Weight per kWp 57.9 kg/kWp 48.5 kg/kWp -9.4 kg/kWp for JKM645-670N-66QL6-BDV-L
Warranty and degradation
Product warranty 12 yrs 12 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.35 %/yr 0.35 %/yr Same
Technology
Cell technology TOPCon N-type TOPCon vs N-type
Cell type Monocrystalline Monocrystalline Same
Cell count 264 264 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#12 vs #12
Tied - the same position in the database
Power density
#14 vs #14
Tied - the same position in the database
Heat behaviour
#511 vs #511
Tied - the same position in the database
Weight
#11,487 vs #2,321
JKM645-670N-66QL6-BDV-L leads by 9,166 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#514 vs #486
JKM645-670N-66QL6-BDV-L leads by 28 places
05

More useful comparisons

Open the full database
Same series, other bin
Jinko Solar JKM670N-66QL6-BDX vs Jinko Solar JKM650-670N-66QL6-BDV (670W class)
2 differences, the largest is weight
Same series, other bin
Jinko Solar JKM670N-66QL6-BDX vs Jinko Solar JKM650-670N-66QL6-BDV-F2-EU (670W)
2 differences, the largest is weight
Same series, other bin
Jinko Solar JKM670N-66QL6-BDX vs Jinko Solar JKM670N-66QL6-BDV-F4-EU
3 differences, the largest is weight
Same series, other bin
Jinko Solar JKM670N-66QL6-BDX vs Jinko Solar JKM650-670N-66QL6-BDV (665W class)
2 differences, the largest is weight
Same series, other bin
Jinko Solar JKM670N-66QL6-BDX vs Jinko Solar JKM650-670N-66QL6-BDV-F2-EU (665W)
2 differences, the largest is weight
Same series, other bin
Jinko Solar JKM670N-66QL6-BDX vs Jinko Solar JKM665N-66QL6-BDV-AntiGlare-F1-EU
3 differences, the largest is weight
06

Written summary

07

Questions about this pairing

Which panel is better: Jinko Solar JKM670N-66QL6-BDX or Jinko Solar JKM645-670N-66QL6-BDV-L?
According to our database: both panels are closely matched on key specs - the decision often comes down to price and local availability. See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Jinko Solar JKM670N-66QL6-BDX and Jinko Solar JKM645-670N-66QL6-BDV-L?
Jinko Solar JKM670N-66QL6-BDX has a module efficiency of 24.80%, while Jinko Solar JKM645-670N-66QL6-BDV-L is 24.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Jinko Solar JKM670N-66QL6-BDX use vs Jinko Solar JKM645-670N-66QL6-BDV-L?
Jinko Solar JKM670N-66QL6-BDX uses TOPCon cells; Jinko Solar JKM645-670N-66QL6-BDV-L 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 JKM670N-66QL6-BDX and Jinko Solar JKM645-670N-66QL6-BDV-L?
Jinko Solar JKM670N-66QL6-BDX has a 30 years power warranty; Jinko Solar JKM645-670N-66QL6-BDV-L 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 JKM670N-66QL6-BDX and Jinko Solar JKM645-670N-66QL6-BDV-L bifacial panels?
Both Jinko Solar JKM670N-66QL6-BDX and Jinko Solar JKM645-670N-66QL6-BDV-L 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.

Shop prices: See 172 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.