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72HGD-620M vs 72HVHF-670M 7 of 19 identical Swap Change panels

Longi Solar LR7-72HGD-620M vs Longi Solar LR7-72HVHF-670M

Longi Solar LR7-72HGD-620M
LR7-72HGD-620M
620 Wp 23.00 % N-type Bifacial
Open panel page Datasheet PDF
VS
Longi Solar LR7-72HVHF-670M
LR7-72HVHF-670M
670 Wp 24.80 % N-type
Open panel page Datasheet PDF
The verdict

72HVHF-670M leads on the differences that matter

The largest is module efficiency: 1.80 pp more efficient. 7 of 19 comparable parameters are identical.

See all 12 differences
How alike are they
7 of 19 comparable
parameters are identical
identical differs
01

What actually differs

12 of 19 parameters
Parameter 72HGD-620M 72HVHF-670M Difference
Module efficiency 23.00 % 24.80 % 1.80 pp more efficient
Rated power 620 Wp 670 Wp 50 W more power
Power density 229.5 Wp/m² 248.0 Wp/m² 18.5 Wp/m² higher
Weight 33.5 kg 28.5 kg 5.0 kg lighter
Weight per kWp 54.0 kg/kWp 42.5 kg/kWp 11.5 kg/kWp lighter
Temperature coefficient -0.280 %/°C -0.260 %/°C 0.020 %/°C better in heat
Product warranty 12 yrs 15 yrs 3 yrs longer
Annual degradation 0.40 %/yr 0.35 %/yr 0.05 %/yr slower
Open-circuit voltage 52.77 V 54.30 V 1.53 V apart
Short-circuit current 14.85 A 15.60 A 0.75 A apart
Bifacial Yes No Yes vs No
Current at max power 13.99 A 14.91 A 0.92 A apart
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
72HGD-620M
20,802 kWh
72HVHF-670M
22,655 kWh
Lifetime gap
1,853 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 72HGD-620M 72HVHF-670M
Standard test conditions 25 °C 100.0% of rated power 620 W 670 W
Cool, bright day 40 °C 95.8% of rated power 594 W 644 W
Typical summer roof 55 °C 91.6% of rated power 568 W 618 W
Hot roof 70 °C 87.4% of rated power 542 W 592 W
03

Full specification

Parameter 72HGD-620M 72HVHF-670M Difference
Power and efficiency
Rated power 620 Wp 670 Wp +50 W for 72HVHF-670M
Module efficiency 23.00 % 24.80 % +1.80 pp for 72HVHF-670M
Power density 229.5 Wp/m² 248.0 Wp/m² +18.5 Wp/m² for 72HVHF-670M
Open-circuit voltage 52.77 V 54.30 V 1.53 V apart
Voltage at max power 44.33 V 44.96 V Effectively the same
Short-circuit current 14.85 A 15.60 A 0.75 A apart
Current at max power 13.99 A 14.91 A 0.92 A apart
Temperature
Temperature coefficient -0.280 %/°C -0.260 %/°C +0.020 %/°C for 72HVHF-670M
Mechanical
Dimensions 2382x1134x30 mm 2382x1134x30 mm Same
Module area 2.701 m² 2.701 m² Same
Weight 33.5 kg 28.5 kg -5.0 kg for 72HVHF-670M
Weight per kWp 54.0 kg/kWp 42.5 kg/kWp -11.5 kg/kWp for 72HVHF-670M
Warranty and degradation
Product warranty 12 yrs 15 yrs +3 yrs for 72HVHF-670M
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.35 %/yr -0.05 %/yr for 72HVHF-670M
Technology
Cell technology N-type N-type Same
Cell type Monocrystalline Monocrystalline Same
Cell count 144 144 Same
Bifacial Yes No Yes vs No
04

Against the whole database

14,005 panels
Efficiency
#1,919 vs #12
72HVHF-670M leads by 1,907 places
Power density
#2,191 vs #14
72HVHF-670M leads by 2,177 places
Heat behaviour
#1,309 vs #511
72HVHF-670M leads by 798 places
Weight
#8,248 vs #226
72HVHF-670M leads by 8,022 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#2,537 vs #284
72HVHF-670M leads by 2,253 places
05

More useful comparisons

Open the full database
Same series, other bin
Longi Solar LR7-72HGD-620M vs Longi Solar LR7-72HGD-625M
The same specification on paper
Same series, other bin
Longi Solar LR7-72HGD-620M vs Longi Solar LR7-72HGD-615M
One difference: module efficiency
Same series, other bin
Longi Solar LR7-72HGD-620M vs Longi Solar LR7-72HGD-610M
3 differences, the largest is module efficiency
Same series, other bin
Longi Solar LR7-72HGD-620M vs Longi Solar LR7-72HGD-605M
3 differences, the largest is module efficiency
Same series, other bin
Longi Solar LR7-72HGD-620M vs Longi Solar LR7-72HGD-600M
3 differences, the largest is module efficiency
Same series, other bin
Longi Solar LR7-72HGD-620M vs Longi Solar LR7-72HGD-595M
4 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Longi Solar LR7-72HGD-620M or Longi Solar LR7-72HVHF-670M?
According to our database: Longi Solar LR7-72HVHF-670M has higher module efficiency (24.80% vs 23.00%); Longi Solar LR7-72HVHF-670M tolerates heat better (temp coeff -0.260%/°C vs -0.280%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Longi Solar LR7-72HGD-620M and Longi Solar LR7-72HVHF-670M?
Longi Solar LR7-72HGD-620M has a module efficiency of 23.00%, while Longi Solar LR7-72HVHF-670M is 24.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Longi Solar LR7-72HGD-620M use vs Longi Solar LR7-72HVHF-670M?
Longi Solar LR7-72HGD-620M uses N-type cells; Longi Solar LR7-72HVHF-670M 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 Longi Solar LR7-72HGD-620M and Longi Solar LR7-72HVHF-670M?
Longi Solar LR7-72HGD-620M has a 30 years power warranty; Longi Solar LR7-72HVHF-670M 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 Longi Solar LR7-72HGD-620M and Longi Solar LR7-72HVHF-670M bifacial panels?
Longi Solar LR7-72HGD-620M is bifacial (captures light from both faces); Longi Solar LR7-72HVHF-670M is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

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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.