JKM650-670N-66QL6-BDV (670W class) vs JKM615-635N-78HL4-(V)-F6-EN (620W variant) 4 of 18 identical Swap Change panels

Jinko Solar JKM650-670N-66QL6-BDV (670W class) vs Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W variant)

Q: Which panel is better: Jinko Solar JKM650-670N-66QL6-BDV (670W class) or Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W variant)?

According to our database: Jinko Solar JKM650-670N-66QL6-BDV (670W class) has higher module efficiency (24.80% vs 22.18%); Jinko Solar JKM650-670N-66QL6-BDV (670W class) 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.

Q: What is the efficiency of Jinko Solar JKM650-670N-66QL6-BDV (670W class) and Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W variant)?

Jinko Solar JKM650-670N-66QL6-BDV (670W class) has a module efficiency of 24.80%, while Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W variant) is 22.18%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does Jinko Solar JKM650-670N-66QL6-BDV (670W class) use vs Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W variant)?

Jinko Solar JKM650-670N-66QL6-BDV (670W class) uses TOPCon cells; Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W 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.

Q: What is the warranty on Jinko Solar JKM650-670N-66QL6-BDV (670W class) and Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W variant)?

Jinko Solar JKM650-670N-66QL6-BDV (670W class) has a 30 years power warranty; Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W 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.

Q: Are Jinko Solar JKM650-670N-66QL6-BDV (670W class) and Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W variant) bifacial panels?

Jinko Solar JKM650-670N-66QL6-BDV (670W class) is bifacial (captures light from both faces); Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W variant) is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

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

670 Wp 24.80 % TOPCon Bifacial

Open panel page Datasheet PDF

JKM615-635N-78HL4-(V)-F6-EN (620W variant)

620 Wp 22.18 % N-type

Open panel page Datasheet PDF

The verdict

JKM650-670N-66QL6-BDV (670W class) leads on the differences that matter

The largest is module efficiency: 2.62 pp more efficient. 4 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See all 14 differences

How alike are they

4 of 18 comparable
parameters are identical

identical differs not published

What actually differs

14 of 18 parameters

Parameter JKM650-670N-66QL6-BDV (670W class) JKM615-635N-78HL4-(V)-F6-EN (620W variant) Difference

Module efficiency 24.80 % 22.18 % 2.62 pp more efficient

Rated power 670 Wp 620 Wp 50 W more power

Power density 248.0 Wp/m² 221.8 Wp/m² 26.2 Wp/m² higher

Temperature coefficient -0.260 %/°C -0.290 %/°C 0.030 %/°C better in heat

Weight 32.5 kg 29.5 kg 3.0 kg lighter

Open-circuit voltage 50.98 V 56.40 V 5.42 V apart

Short-circuit current 16.22 A 13.86 A 2.36 A apart

Module area 2.701 m² 2.795 m² 0.094 m² apart

Cell technology TOPCon N-type TOPCon vs N-type

Annual degradation 0.35 %/yr 0.40 %/yr 0.05 %/yr slower

Current at max power 15.55 A 13.20 A 2.35 A apart

Voltage at max power 43.09 V 46.97 V 3.88 V apart

Bifacial Yes No Yes vs No

Dimensions 2382x1134x30 mm 2465x1134x35 mm 2382x1134x30 mm vs 2465x1134x35 mm

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

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

22,655 kWh

JKM615-635N-78HL4-(V)-F6-EN (620W variant)

20,802 kWh

Lifetime gap

1,853 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario JKM650-670N-66QL6-BDV (670W class) JKM615-635N-78HL4-(V)-F6-EN (620W variant)

Standard test conditions 25 °C 100.0% of rated power 670 W 620 W

Cool, bright day 40 °C 95.7% of rated power 644 W 593 W

Typical summer roof 55 °C 91.3% of rated power 618 W 566 W

Hot roof 70 °C 87.0% of rated power 592 W 539 W

Full specification

Parameter JKM650-670N-66QL6-BDV (670W class) JKM615-635N-78HL4-(V)-F6-EN (620W variant) Difference

Power and efficiency

Rated power 670 Wp 620 Wp +50 W for JKM650-670N-66QL6-BDV (670W class)

Module efficiency 24.80 % 22.18 % +2.62 pp for JKM650-670N-66QL6-BDV (670W class)

Power density 248.0 Wp/m² 221.8 Wp/m² +26.2 Wp/m² for JKM650-670N-66QL6-BDV (670W class)

Open-circuit voltage 50.98 V 56.40 V 5.42 V apart

Voltage at max power 43.09 V 46.97 V 3.88 V apart

Short-circuit current 16.22 A 13.86 A 2.36 A apart

Current at max power 15.55 A 13.20 A 2.35 A apart

Temperature

Temperature coefficient -0.260 %/°C -0.290 %/°C +0.030 %/°C for JKM650-670N-66QL6-BDV (670W class)

Mechanical

Dimensions 2382x1134x30 mm 2465x1134x35 mm 2382x1134x30 mm vs 2465x1134x35 mm

Module area 2.701 m² 2.795 m² 0.094 m² apart

Weight 32.5 kg 29.5 kg -3.0 kg for JKM615-635N-78HL4-(V)-F6-EN (620W variant)

Weight per kWp 48.5 kg/kWp 47.6 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 0.40 %/yr -0.05 %/yr for JKM650-670N-66QL6-BDV (670W class)

Technology

Cell technology TOPCon N-type TOPCon vs N-type

Cell type Monocrystalline Monocrystalline Same

Cell count - 156 Not published by Jinko Solar

Bifacial Yes No Yes vs No

Against the whole database

14,129 panels

Efficiency

#13 vs #5,994

JKM650-670N-66QL6-BDV (670W class) leads by 5,981 places

Power density

#15 vs #5,933

JKM650-670N-66QL6-BDV (670W class) leads by 5,918 places

Heat behaviour

#515 vs #2,220

JKM650-670N-66QL6-BDV (670W class) leads by 1,705 places

Weight

#2,326 vs #1,762

JKM615-635N-78HL4-(V)-F6-EN (620W variant) leads by 564 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#493 vs #3,410

JKM650-670N-66QL6-BDV (670W class) leads by 2,917 places

More useful comparisons

Open the full database

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

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Jinko Solar JKM650-670N-66QL6-BDV (670W class) vs Jinko Solar JKM670N-66QL6-BDV-F4-EU

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

The same specification on paper

Same series, other bin

Jinko Solar JKM650-670N-66QL6-BDV (670W class) vs Jinko Solar JKM650-670N-66QL6-BDV-F2-EU (665W)

The same specification on paper

Same series, other bin

Jinko Solar JKM650-670N-66QL6-BDV (670W class) vs Jinko Solar JKM665N-66QL6-BDV-AntiGlare-F1-EU

One difference: cell technology

Written summary

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Questions about this pairing

Which panel is better: Jinko Solar JKM650-670N-66QL6-BDV (670W class) or Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W variant)?

According to our database: Jinko Solar JKM650-670N-66QL6-BDV (670 W class) has higher module efficiency (24.80% vs 22.18%); Jinko Solar JKM650-670N-66QL6-BDV (670 W class) 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 JKM650-670N-66QL6-BDV (670W class) and Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W variant)?

Jinko Solar JKM650-670N-66QL6-BDV (670 W class) has a module efficiency of 24.80%, while Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620 W variant) is 22.18%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

What cell technology does Jinko Solar JKM650-670N-66QL6-BDV (670W class) use vs Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W variant)?

Jinko Solar JKM650-670N-66QL6-BDV (670 W class) uses TOPCon cells; Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620 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 JKM650-670N-66QL6-BDV (670W class) and Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W variant)?

Jinko Solar JKM650-670N-66QL6-BDV (670 W class) has a 30 years power warranty; Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620 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.

Are Jinko Solar JKM650-670N-66QL6-BDV (670W class) and Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W variant) bifacial panels?

Jinko Solar JKM650-670N-66QL6-BDV (670 W class) is bifacial (captures light from both faces); Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620 W variant) is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

Shop prices: See 139 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.