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

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

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

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

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

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

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

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

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

620 Wp 22.18 % N-type

Open panel page Datasheet PDF

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

670 Wp 24.80 % TOPCon Bifacial

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

Module efficiency 22.18 % 24.80 % 2.62 pp more efficient

Rated power 620 Wp 670 Wp 50 W more power

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

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

Weight 29.5 kg 32.5 kg 3.0 kg lighter

Open-circuit voltage 56.40 V 50.98 V 5.42 V apart

Short-circuit current 13.86 A 16.22 A 2.36 A apart

Module area 2.795 m² 2.701 m² 0.094 m² apart

Cell technology N-type TOPCon N-type vs TOPCon

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

Current at max power 13.20 A 15.55 A 2.35 A apart

Voltage at max power 46.97 V 43.09 V 3.88 V apart

Bifacial No Yes No vs Yes

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

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

20,802 kWh

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

22,655 kWh

Lifetime gap

1,853 kWh

Output when it is hot

Rated power carried across the range a module actually sees

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

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

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

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

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

Full specification

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

Power and efficiency

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

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

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

Open-circuit voltage 56.40 V 50.98 V 5.42 V apart

Voltage at max power 46.97 V 43.09 V 3.88 V apart

Short-circuit current 13.86 A 16.22 A 2.36 A apart

Current at max power 13.20 A 15.55 A 2.35 A apart

Temperature

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

Mechanical

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

Module area 2.795 m² 2.701 m² 0.094 m² apart

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

Weight per kWp 47.6 kg/kWp 48.5 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 0.35 %/yr -0.05 %/yr for JKM650-670N-66QL6-BDV (670W class)

Technology

Cell technology N-type TOPCon N-type vs TOPCon

Cell type Monocrystalline Monocrystalline Same

Cell count 156 - Not published by Jinko Solar

Bifacial No Yes No vs Yes

Against the whole database

14,129 panels

Efficiency

#5,994 vs #13

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

Power density

#5,933 vs #15

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

Heat behaviour

#2,220 vs #515

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

Weight

#1,762 vs #2,326

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

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#3,410 vs #493

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

More useful comparisons

Open the full database

Same series, other bin

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

3 differences, the largest is module efficiency

Same series, other bin

Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W variant) vs Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (630W variant)

3 differences, the largest is module efficiency

Same series, other bin

Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W variant) vs Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (625W variant)

The same specification on paper

Same series, other bin

Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (620W variant) vs Jinko Solar JKM615-635N-78HL4-(V)-F6-EN (615W variant)

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 (670W)

The same specification on paper

Same series, other bin

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

One difference: cell technology

Written summary

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Questions about this pairing

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

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

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

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

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

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