Longi Solar LR7-72HVHF-670M vs Longi Solar LR7-72HTDR-620M
VS
The verdict
72HVHF-670M leads on the differences that matter
The largest is module efficiency: 1.80 pp more efficient. 9 of 19 comparable parameters are identical.
See all 10 differencesHow alike are they
9
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
10 of 19 parameters
What actually differs
Parameter
72HVHF-670M
72HTDR-620M
Difference
Module efficiency
24.80 %
23.00 %
1.80 pp more efficient
Rated power
670 Wp
620 Wp
50 W more power
Power density
248.0 Wp/m²
229.5 Wp/m²
18.5 Wp/m² higher
Weight
28.5 kg
33.5 kg
5.0 kg lighter
Weight per kWp
42.5 kg/kWp
54.0 kg/kWp
11.5 kg/kWp lighter
Temperature coefficient
-0.260 %/°C
-0.280 %/°C
0.020 %/°C better in heat
Short-circuit current
15.60 A
14.82 A
0.78 A apart
Bifacial
No
Yes
No vs Yes
Open-circuit voltage
54.30 V
53.11 V
1.19 V apart
Current at max power
14.91 A
13.85 A
1.06 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
72HVHF-670M
22,655 kWh
72HTDR-620M
20,964 kWh
Lifetime gap
1,691 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
72HVHF-670M
72HTDR-620M
Standard test conditions
25 °C
100.0% of rated power
670 W
620 W
Cool, bright day
40 °C
95.8% of rated power
644 W
594 W
Typical summer roof
55 °C
91.6% of rated power
618 W
568 W
Hot roof
70 °C
87.4% of rated power
592 W
542 W
03
Full specification
Parameter
72HVHF-670M
72HTDR-620M
Difference
Power and efficiency
Rated power
670 Wp
620 Wp
+50 W for 72HVHF-670M
Module efficiency
24.80 %
23.00 %
+1.80 pp for 72HVHF-670M
Power density
248.0 Wp/m²
229.5 Wp/m²
+18.5 Wp/m² for 72HVHF-670M
Open-circuit voltage
54.30 V
53.11 V
1.19 V apart
Voltage at max power
44.96 V
44.78 V
Effectively the same
Short-circuit current
15.60 A
14.82 A
0.78 A apart
Current at max power
14.91 A
13.85 A
1.06 A apart
Temperature
Temperature coefficient
-0.260 %/°C
-0.280 %/°C
+0.020 %/°C for 72HVHF-670M
Mechanical
Dimensions
2382x1134x30 mm
2382x1134x30 mm
Same
Module area
2.701 m²
2.701 m²
Same
Weight
28.5 kg
33.5 kg
-5.0 kg for 72HVHF-670M
Weight per kWp
42.5 kg/kWp
54.0 kg/kWp
-11.5 kg/kWp for 72HVHF-670M
Warranty and degradation
Product warranty
15 yrs
15 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.35 %/yr
0.35 %/yr
Same
Technology
Cell technology
N-type
N-type
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
144
144
Same
Bifacial
No
Yes
No vs Yes
04
14,005 panels
Against the whole database
Efficiency
#12
vs
#1,919
72HVHF-670M leads by 1,907 places
Power density
#14
vs
#2,191
72HVHF-670M leads by 2,177 places
Heat behaviour
#511
vs
#1,309
72HVHF-670M leads by 798 places
Weight
#226
vs
#8,248
72HVHF-670M leads by 8,022 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#284
vs
#2,048
72HVHF-670M leads by 1,764 places
05
Open the full database
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3 differences, the largest is module efficiency
06
Written summary
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07
Questions about this pairing
Which panel is better: Longi Solar LR7-72HVHF-670M or Longi Solar LR7-72HTDR-620M?
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 LR7-72HVHF-670M and Longi Solar LR7-72HTDR-620M?
Longi Solar LR7-72HVHF-670M has a module efficiency of 24.80%, while Longi Solar LR7-72HTDR-620M is 23.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Longi Solar LR7-72HVHF-670M use vs Longi Solar LR7-72HTDR-620M?
Longi Solar LR7-72HVHF-670M uses N-type cells; Longi Solar LR7-72HTDR-620M 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 LR7-72HVHF-670M and Longi Solar LR7-72HTDR-620M?
Longi Solar LR7-72HVHF-670M has a 30 years power warranty; Longi Solar LR7-72HTDR-620M 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 LR7-72HVHF-670M and Longi Solar LR7-72HTDR-620M bifacial panels?
Longi Solar LR7-72HTDR-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.
Shop prices: See 174 Longi 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.