JKM645-670N-66QL6-BDV-L vs JKM650-670N-66QL6-BDV (655W class) 14 of 18 identical Swap Change panels

Jinko Solar JKM645-670N-66QL6-BDV-L vs Jinko Solar JKM650-670N-66QL6-BDV (655W class)

Q: Which panel is better: Jinko Solar JKM645-670N-66QL6-BDV-L or Jinko Solar JKM650-670N-66QL6-BDV (655W class)?

According to our database: Jinko Solar JKM645-670N-66QL6-BDV-L has higher module efficiency (24.80% vs 24.25%). See the full spec comparison and 30-year energy simulation above for a complete picture.

Q: What is the efficiency of Jinko Solar JKM645-670N-66QL6-BDV-L and Jinko Solar JKM650-670N-66QL6-BDV (655W class)?

Jinko Solar JKM645-670N-66QL6-BDV-L has a module efficiency of 24.80%, while Jinko Solar JKM650-670N-66QL6-BDV (655W class) is 24.25%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does Jinko Solar JKM645-670N-66QL6-BDV-L use vs Jinko Solar JKM650-670N-66QL6-BDV (655W class)?

Jinko Solar JKM645-670N-66QL6-BDV-L uses N-type cells; Jinko Solar JKM650-670N-66QL6-BDV (655W class) uses TOPCon. Modern n-type technologies (TOPCon, HJT, BC) typically deliver higher efficiency and lower degradation compared to older PERC (p-type) cells.

Q: What is the warranty on Jinko Solar JKM645-670N-66QL6-BDV-L and Jinko Solar JKM650-670N-66QL6-BDV (655W class)?

Jinko Solar JKM645-670N-66QL6-BDV-L has a 30 years power warranty; Jinko Solar JKM650-670N-66QL6-BDV (655W class) 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.

Q: Are Jinko Solar JKM645-670N-66QL6-BDV-L and Jinko Solar JKM650-670N-66QL6-BDV (655W class) bifacial panels?

Both Jinko Solar JKM645-670N-66QL6-BDV-L and Jinko Solar JKM650-670N-66QL6-BDV (655W class) 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.

JKM645-670N-66QL6-BDV-L

670 Wp 24.80 % N-type Bifacial

Open panel page Datasheet PDF

JKM650-670N-66QL6-BDV (655W class)

655 Wp 24.25 % TOPCon Bifacial

Open panel page Datasheet PDF

The verdict

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

The largest is module efficiency: 0.55 pp more efficient. 14 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See all 4 differences

How alike are they

14 of 18 comparable
parameters are identical

identical differs not published

What actually differs

4 of 18 parameters

Parameter JKM645-670N-66QL6-BDV-L JKM650-670N-66QL6-BDV (655W class) Difference

Module efficiency 24.80 % 24.25 % 0.55 pp more efficient

Power density 248.0 Wp/m² 242.5 Wp/m² 5.6 Wp/m² higher

Rated power 670 Wp 655 Wp 15 W more power

Cell technology N-type TOPCon N-type vs TOPCon

What it means on a roof

Thirty years of production

Each panel's own declared degradation curve, at 1,200 kWh/kWp a year

Cell temperature

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.

JKM645-670N-66QL6-BDV-L

22,655 kWh

JKM650-670N-66QL6-BDV (655W class)

22,148 kWh

Lifetime gap

507 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario JKM645-670N-66QL6-BDV-L JKM650-670N-66QL6-BDV (655W class)

Standard test conditions 25 °C 100.0% of rated power 670 W 655 W

Cool, bright day 40 °C 96.1% of rated power 644 W 629 W

Typical summer roof 55 °C 92.2% of rated power 618 W 604 W

Hot roof 70 °C 88.3% of rated power 592 W 578 W

Full specification

Parameter JKM645-670N-66QL6-BDV-L JKM650-670N-66QL6-BDV (655W class) Difference

Power and efficiency

Rated power 670 Wp 655 Wp +15 W for JKM645-670N-66QL6-BDV-L

Module efficiency 24.80 % 24.25 % +0.55 pp for JKM645-670N-66QL6-BDV-L

Power density 248.0 Wp/m² 242.5 Wp/m² +5.6 Wp/m² for JKM645-670N-66QL6-BDV-L

Open-circuit voltage 50.60 V 50.44 V Effectively the same

Voltage at max power 42.92 V 42.70 V Effectively the same

Short-circuit current 16.34 A 16.04 A Effectively the same

Current at max power 15.61 A 15.34 A Effectively the 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 32.5 kg 32.5 kg Same

Weight per kWp 48.5 kg/kWp 49.6 kg/kWp Effectively the same

Warranty and degradation

Product warranty 12 yrs 12 yrs Same

Performance warranty 30 yrs 30 yrs Same

Annual degradation 0.35 %/yr 0.35 %/yr Same

Technology

Cell technology N-type TOPCon N-type vs TOPCon

Cell type Monocrystalline Monocrystalline Same

Cell count 264 - Not published by Jinko Solar

Bifacial Yes Yes Same

Against the whole database

14,005 panels

Efficiency

#12 vs #171

JKM645-670N-66QL6-BDV-L leads by 159 places

Power density

#14 vs #172

JKM645-670N-66QL6-BDV-L leads by 158 places

Heat behaviour

#511 vs #511

Tied - the same position in the database

Weight

#2,321 vs #3,162

JKM645-670N-66QL6-BDV-L leads by 841 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#486 vs #984

JKM645-670N-66QL6-BDV-L leads by 498 places

More useful comparisons

Open the full database

Same series, other bin

Jinko Solar JKM645-670N-66QL6-BDV-L vs Jinko Solar JKM650-670N-66QL6-BDV (670W class)

One difference: cell technology

Same series, other bin

Jinko Solar JKM645-670N-66QL6-BDV-L vs Jinko Solar JKM650-670N-66QL6-BDV (665W class)

One difference: cell technology

Same series, other bin

Jinko Solar JKM645-670N-66QL6-BDV-L vs Jinko Solar JKM665N-66QL6-BDV-AntiGlare-F1-EU

The same specification on paper

Same series, other bin

Jinko Solar JKM645-670N-66QL6-BDV-L vs Jinko Solar JKM650-670N-66QL6-BDV (660W class)

4 differences, the largest is module efficiency

Same series, other bin

Jinko Solar JKM645-670N-66QL6-BDV-L vs Jinko Solar JKM660N-66QL6-BDV-AntiGlare-F1-EU

3 differences, the largest is module efficiency

Same series, other bin

Jinko Solar JKM645-670N-66QL6-BDV-L vs Jinko Solar JKM655N-66QL6-BDV-AntiGlare-F1-EU

3 differences, the largest is module efficiency

Written summary

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Questions about this pairing

Which panel is better: Jinko Solar JKM645-670N-66QL6-BDV-L or Jinko Solar JKM650-670N-66QL6-BDV (655W class)?

According to our database: Jinko Solar JKM645-670N-66QL6-BDV-L has higher module efficiency (24.80% vs 24.25%). See the full spec comparison and 30-year energy simulation above for a complete picture.

What is the efficiency of Jinko Solar JKM645-670N-66QL6-BDV-L and Jinko Solar JKM650-670N-66QL6-BDV (655W class)?

Jinko Solar JKM645-670N-66QL6-BDV-L has a module efficiency of 24.80%, while Jinko Solar JKM650-670N-66QL6-BDV (655 W class) is 24.25%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

What cell technology does Jinko Solar JKM645-670N-66QL6-BDV-L use vs Jinko Solar JKM650-670N-66QL6-BDV (655W class)?

Jinko Solar JKM645-670N-66QL6-BDV-L uses N-type cells; Jinko Solar JKM650-670N-66QL6-BDV (655 W class) 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 JKM645-670N-66QL6-BDV-L and Jinko Solar JKM650-670N-66QL6-BDV (655W class)?

Jinko Solar JKM645-670N-66QL6-BDV-L has a 30 years power warranty; Jinko Solar JKM650-670N-66QL6-BDV (655 W class) 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 JKM645-670N-66QL6-BDV-L and Jinko Solar JKM650-670N-66QL6-BDV (655W class) bifacial panels?

Both Jinko Solar JKM645-670N-66QL6-BDV-L and Jinko Solar JKM650-670N-66QL6-BDV (655 W class) 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 158 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.