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LGi7-72HTD-620M vs 605M 14 of 17 identical Swap Change panels

Longi Solar LGi7-72HTD-620M vs Longi Solar 605M

LGi7-72HTD-620M
620 Wp 23.10 %
Open panel page Datasheet PDF
VS
Longi Solar 605M
605M
605 Wp 22.60 %
Open panel page Datasheet PDF
The verdict

LGi7-72HTD-620M leads on the differences that matter

The largest is module efficiency: 0.50 pp more efficient. 14 of 17 comparable parameters are identical, with 2 more left out because at least one datasheet does not publish them.

See all 3 differences
How alike are they
14 of 17 comparable
parameters are identical
identical differs not published
01

What actually differs

3 of 17 parameters
Parameter LGi7-72HTD-620M 605M Difference
Module efficiency 23.10 % 22.60 % 0.50 pp more efficient
Power density 231.3 Wp/m² 225.7 Wp/m² 5.6 Wp/m² higher
Rated power 620 Wp 605 Wp 15 W more power
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 (-0.280 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
LGi7-72HTD-620M
20,802 kWh
605M
20,299 kWh
Lifetime gap
503 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario LGi7-72HTD-620M 605M
Standard test conditions 25 °C 100.0% of rated power 620 W 605 W
Cool, bright day 40 °C 95.8% of rated power 594 W 580 W
Typical summer roof 55 °C 91.6% of rated power 568 W 554 W
Hot roof 70 °C 87.4% of rated power 542 W 529 W
03

Full specification

Parameter LGi7-72HTD-620M 605M Difference
Power and efficiency
Rated power 620 Wp 605 Wp +15 W for LGi7-72HTD-620M
Module efficiency 23.10 % 22.60 % +0.50 pp for LGi7-72HTD-620M
Power density 231.3 Wp/m² 225.7 Wp/m² +5.6 Wp/m² for LGi7-72HTD-620M
Open-circuit voltage 53.11 V 52.66 V Effectively the same
Voltage at max power 44.77 V 44.33 V Effectively the same
Short-circuit current 14.82 A 14.62 A Effectively the same
Current at max power 13.85 A 13.65 A Effectively the same
Temperature
Temperature coefficient -0.280 %/°C -0.280 %/°C Same
Mechanical
Dimensions 2376x1128x5 mm 2376x1128x5 mm Same
Module area 2.680 m² 2.680 m² Same
Weight 31.0 kg 31.0 kg Same
Weight per kWp 50.0 kg/kWp 51.2 kg/kWp Effectively the same
Warranty and degradation
Product warranty 25 yrs 25 yrs Same
Performance warranty 25 yrs 25 yrs Same
Annual degradation 0.40 %/yr 0.40 %/yr Same
Technology
Cell technology - - Neither datasheet publishes this
Cell type Monocrystalline Monocrystalline Same
Cell count 72 - Not published by Longi Solar
Bifacial No No Same
04

Against the whole database

14,129 panels
Efficiency
#1,617 vs #3,716
LGi7-72HTD-620M leads by 2,099 places
Power density
#1,665 vs #3,901
LGi7-72HTD-620M leads by 2,236 places
Heat behaviour
#1,347 vs #1,347
Tied - the same position in the database
Weight
#3,329 vs #4,655
LGi7-72HTD-620M leads by 1,326 places
Warranty
#9,912 vs #9,912
Tied - the same position in the database
Overall
#1,436 vs #2,015
LGi7-72HTD-620M leads by 579 places
05

More useful comparisons

Open the full database
Same series, other bin
Longi Solar LGi7-72HTD-620M vs Longi Solar 620M
The same specification on paper
Same series, other bin
Longi Solar LGi7-72HTD-620M vs Longi Solar 615M
One difference: module efficiency
Same series, other bin
Longi Solar LGi7-72HTD-620M vs Longi Solar LGi7-72HTD-615M
One difference: module efficiency
Same series, other bin
Longi Solar LGi7-72HTD-620M vs Longi Solar 610M
3 differences, the largest is module efficiency
Same series, other bin
Longi Solar LGi7-72HTD-620M vs Longi Solar LGi7-72HTD-610M
3 differences, the largest is module efficiency
Same series, other bin
Longi Solar LGi7-72HTD-620M vs Longi Solar LGi7-72HTD-605M
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Longi Solar LGi7-72HTD-620M or Longi Solar 605M?
According to our database: Longi Solar LGi7-72HTD-620M has higher module efficiency (23.10% vs 22.60%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Longi Solar LGi7-72HTD-620M and Longi Solar 605M?
Longi Solar LGi7-72HTD-620M has a module efficiency of 23.10%, while Longi Solar 605M is 22.60%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Longi Solar LGi7-72HTD-620M use vs Longi Solar 605M?
Longi Solar LGi7-72HTD-620M uses Monocrystalline cells; Longi Solar 605M uses Monocrystalline. 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 LGi7-72HTD-620M and Longi Solar 605M?
Longi Solar LGi7-72HTD-620M has a 25 years power warranty; Longi Solar 605M has a 25 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 154 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.