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615M vs LGi7-72HTD-615M 17 of 17 identical Swap Change panels

Longi Solar 615M vs Longi Solar LGi7-72HTD-615M

Longi Solar 615M
615M
615 Wp 22.90 %
Open panel page Datasheet PDF
VS
LGi7-72HTD-615M
615 Wp 22.90 %
Open panel page Datasheet PDF
The verdict

Identical on every published parameter

All 17 comparable parameters agree, with 2 more left out because at least one datasheet does not publish them. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from.

How alike are they
17 of 17 comparable
parameters are identical
identical differs not published
01

What actually differs

0 of 17 parameters

Every comparable parameter agrees. The full specification is below.

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.
615M
20,634 kWh
LGi7-72HTD-615M
20,634 kWh
Lifetime gap
No difference
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 615M LGi7-72HTD-615M
Standard test conditions 25 °C 100.0% of rated power 615 W 615 W
Cool, bright day 40 °C 95.8% of rated power 589 W 589 W
Typical summer roof 55 °C 91.6% of rated power 563 W 563 W
Hot roof 70 °C 87.4% of rated power 538 W 538 W
03

Full specification

Parameter 615M LGi7-72HTD-615M Difference
Power and efficiency
Rated power 615 Wp 615 Wp Same
Module efficiency 22.90 % 22.90 % Same
Power density 229.5 Wp/m² 229.5 Wp/m² Same
Open-circuit voltage 52.96 V 52.96 V Same
Voltage at max power 44.63 V 44.63 V Same
Short-circuit current 14.75 A 14.75 A Same
Current at max power 13.78 A 13.78 A 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 50.4 kg/kWp 50.4 kg/kWp 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
#2,412 vs #2,412
Tied - the same position in the database
Power density
#2,367 vs #2,367
Tied - the same position in the database
Heat behaviour
#1,347 vs #1,347
Tied - the same position in the database
Weight
#3,802 vs #3,802
Tied - the same position in the database
Warranty
#9,912 vs #9,912
Tied - the same position in the database
Overall
#1,620 vs #1,620
Tied - the same position in the database
05

More useful comparisons

Open the full database
Same series, other bin
Longi Solar 615M vs Longi Solar 620M
One difference: module efficiency
Same series, other bin
Longi Solar 615M vs Longi Solar LGi7-72HTD-620M
One difference: module efficiency
Same series, other bin
Longi Solar 615M vs Longi Solar 610M
The same specification on paper
Same series, other bin
Longi Solar 615M vs Longi Solar LGi7-72HTD-610M
The same specification on paper
Same series, other bin
Longi Solar 615M vs Longi Solar 605M
3 differences, the largest is module efficiency
Same series, other bin
Longi Solar 615M 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 615M or Longi Solar LGi7-72HTD-615M?
According to our database: both panels are closely matched on key specs - the decision often comes down to price and local availability. See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Longi Solar 615M and Longi Solar LGi7-72HTD-615M?
Longi Solar 615M has a module efficiency of 22.90%, while Longi Solar LGi7-72HTD-615M is 22.90%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Longi Solar 615M use vs Longi Solar LGi7-72HTD-615M?
Longi Solar 615M uses Monocrystalline cells; Longi Solar LGi7-72HTD-615M 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 615M and Longi Solar LGi7-72HTD-615M?
Longi Solar 615M has a 25 years power warranty; Longi Solar LGi7-72HTD-615M 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.