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54HVH-490M vs 72HVH-670M 10 of 19 identical Swap Change panels

Longi Solar LR7-54HVH-490M vs Longi Solar LR7-72HVH-670M

Longi Solar LR7-54HVH-490M
LR7-54HVH-490M
490 Wp 24.00 % N-type
Open panel page Datasheet PDF
VS
Longi Solar LR7-72HVH-670M
LR7-72HVH-670M
670 Wp 24.80 % N-type
Open panel page Datasheet PDF
The verdict

72HVH-670M leads on the differences that matter

The largest is module efficiency: 0.80 pp more efficient. 10 of 19 comparable parameters are identical.

See all 9 differences
How alike are they
10 of 19 comparable
parameters are identical
identical differs
01

What actually differs

9 of 19 parameters
Parameter 54HVH-490M 72HVH-670M Difference
Module efficiency 24.00 % 24.80 % 0.80 pp more efficient
Rated power 490 Wp 670 Wp 180 W more power
Weight 21.6 kg 28.5 kg 6.9 kg lighter
Power density 240.1 Wp/m² 248.0 Wp/m² 8.0 Wp/m² higher
Open-circuit voltage 40.52 V 54.30 V 13.78 V apart
Module area 2.041 m² 2.701 m² 0.660 m² apart
Voltage at max power 33.51 V 44.96 V 11.45 V apart
Cell count 108 144 36 cells apart
Dimensions 1800x1134x30 mm 2382x1134x30 mm 1800x1134x30 mm vs 2382x1134x30 mm
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
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.
54HVH-490M
16,568 kWh
72HVH-670M
22,655 kWh
Lifetime gap
6,087 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 54HVH-490M 72HVH-670M
Standard test conditions 25 °C 100.0% of rated power 490 W 670 W
Cool, bright day 40 °C 96.1% of rated power 471 W 644 W
Typical summer roof 55 °C 92.2% of rated power 452 W 618 W
Hot roof 70 °C 88.3% of rated power 433 W 592 W
03

Full specification

Parameter 54HVH-490M 72HVH-670M Difference
Power and efficiency
Rated power 490 Wp 670 Wp +180 W for 72HVH-670M
Module efficiency 24.00 % 24.80 % +0.80 pp for 72HVH-670M
Power density 240.1 Wp/m² 248.0 Wp/m² +8.0 Wp/m² for 72HVH-670M
Open-circuit voltage 40.52 V 54.30 V 13.78 V apart
Voltage at max power 33.51 V 44.96 V 11.45 V apart
Short-circuit current 15.33 A 15.60 A Effectively the same
Current at max power 14.63 A 14.91 A Effectively the same
Temperature
Temperature coefficient -0.260 %/°C -0.260 %/°C Same
Mechanical
Dimensions 1800x1134x30 mm 2382x1134x30 mm 1800x1134x30 mm vs 2382x1134x30 mm
Module area 2.041 m² 2.701 m² 0.660 m² apart
Weight 21.6 kg 28.5 kg -6.9 kg for 54HVH-490M
Weight per kWp 44.1 kg/kWp 42.5 kg/kWp Effectively the same
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 108 144 36 cells apart
Bifacial No No Same
04

Against the whole database

14,005 panels
Efficiency
#303 vs #12
72HVH-670M leads by 291 places
Power density
#313 vs #14
72HVH-670M leads by 299 places
Heat behaviour
#511 vs #511
Tied - the same position in the database
Weight
#377 vs #226
72HVH-670M leads by 151 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#5,020 vs #284
72HVH-670M leads by 4,736 places
05

More useful comparisons

Open the full database
Same series, other bin
Longi Solar LR7-54HVH-490M vs Longi Solar LR7-54HVH-500M
3 differences, the largest is module efficiency
Same series, other bin
Longi Solar LR7-54HVH-490M vs Longi Solar LR7-54HVH-495M
One difference: module efficiency
Same series, other bin
Longi Solar LR7-54HVH-490M vs Longi Solar LR7-54HVH-485M
One difference: module efficiency
Same series, other bin
Longi Solar LR7-54HVH-490M vs Longi Solar LR7-54HVH-480M
3 differences, the largest is module efficiency
Same series, other bin
Longi Solar LR7-72HVH-670M vs Longi Solar LR7-72HVH-665M
One difference: module efficiency
Same series, other bin
Longi Solar LR7-72HVH-670M vs Longi Solar LR7-72HVH-660M
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Longi Solar LR7-54HVH-490M or Longi Solar LR7-72HVH-670M?
According to our database: Longi Solar LR7-72HVH-670M has higher module efficiency (24.80% vs 24.00%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Longi Solar LR7-54HVH-490M and Longi Solar LR7-72HVH-670M?
Longi Solar LR7-54HVH-490M has a module efficiency of 24.00%, while Longi Solar LR7-72HVH-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 LR7-54HVH-490M use vs Longi Solar LR7-72HVH-670M?
Longi Solar LR7-54HVH-490M uses N-type cells; Longi Solar LR7-72HVH-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 LR7-54HVH-490M and Longi Solar LR7-72HVH-670M?
Longi Solar LR7-54HVH-490M has a 30 years power warranty; Longi Solar LR7-72HVH-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.

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.