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610M vs 615M 18 of 19 identical Swap Change panels

Longi Solar LR7-72HTDR-610M vs Longi Solar LR7-72HTDR-615M

Longi Solar LR7-72HTDR-610M
LR7-72HTDR-610M
610 Wp 22.60 % N-type Bifacial
Open panel page Datasheet PDF
VS
Longi Solar LR7-72HTDR-615M
LR7-72HTDR-615M
615 Wp 22.80 % N-type Bifacial
Open panel page Datasheet PDF
The verdict

615M leads on the differences that matter

The largest is module efficiency: 0.20 pp more efficient. 18 of 19 comparable parameters are identical.

See the one difference
How alike are they
18 of 19 comparable
parameters are identical
identical differs
01

What actually differs

1 of 19 parameters
Parameter 610M 615M Difference
Module efficiency 22.60 % 22.80 % 0.20 pp more efficient
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.
610M
20,626 kWh
615M
20,795 kWh
Lifetime gap
169 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 610M 615M
Standard test conditions 25 °C 100.0% of rated power 610 W 615 W
Cool, bright day 40 °C 95.8% of rated power 584 W 589 W
Typical summer roof 55 °C 91.6% of rated power 559 W 563 W
Hot roof 70 °C 87.4% of rated power 533 W 538 W
03

Full specification

Parameter 610M 615M Difference
Power and efficiency
Rated power 610 Wp 615 Wp Effectively the same
Module efficiency 22.60 % 22.80 % +0.20 pp for 615M
Power density 225.8 Wp/m² 227.7 Wp/m² Effectively the same
Open-circuit voltage 52.81 V 52.96 V Effectively the same
Voltage at max power 44.48 V 44.63 V Effectively the same
Short-circuit current 14.69 A 14.75 A Effectively the same
Current at max power 13.72 A 13.78 A Effectively the same
Temperature
Temperature coefficient -0.280 %/°C -0.280 %/°C Same
Mechanical
Dimensions 2382x1134x30 mm 2382x1134x30 mm Same
Module area 2.701 m² 2.701 m² Same
Weight 33.5 kg 33.5 kg Same
Weight per kWp 54.9 kg/kWp 54.5 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 144 144 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#3,658 vs #2,714
615M leads by 944 places
Power density
#3,729 vs #3,077
615M leads by 652 places
Heat behaviour
#1,309 vs #1,309
Tied - the same position in the database
Weight
#9,292 vs #8,815
615M leads by 477 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#2,694 vs #2,350
615M leads by 344 places
05

More useful comparisons

Open the full database
Same series, other bin
Longi Solar LR7-72HTDR-610M vs Longi Solar LR7-72HTDR-625M
3 differences, the largest is module efficiency
Same series, other bin
Longi Solar LR7-72HTDR-610M vs Longi Solar LR7-72HTDR-620M
3 differences, the largest is module efficiency
Same series, other bin
Longi Solar LR7-72HTDR-610M vs Longi Solar LR7-72HTDR-605M
One difference: module efficiency
Same series, other bin
Longi Solar LR7-72HTDR-610M vs Longi Solar LR7-72HTDR-600M
3 differences, the largest is module efficiency
Same manufacturer
Longi Solar LR7-72HTDR-610M vs Longi Solar LR7-72HVHF-670M
10 differences, the largest is module efficiency
Same manufacturer
Longi Solar LR7-72HTDR-610M vs Longi Solar LR8-66HYD-670M
12 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Longi Solar LR7-72HTDR-610M or Longi Solar LR7-72HTDR-615M?
According to our database: Longi Solar LR7-72HTDR-615M has higher module efficiency (22.80% 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 LR7-72HTDR-610M and Longi Solar LR7-72HTDR-615M?
Longi Solar LR7-72HTDR-610M has a module efficiency of 22.60%, while Longi Solar LR7-72HTDR-615M is 22.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Longi Solar LR7-72HTDR-610M use vs Longi Solar LR7-72HTDR-615M?
Longi Solar LR7-72HTDR-610M uses N-type cells; Longi Solar LR7-72HTDR-615M 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 LR7-72HTDR-610M and Longi Solar LR7-72HTDR-615M?
Longi Solar LR7-72HTDR-610M has a 30 years power warranty; Longi Solar LR7-72HTDR-615M 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 LR7-72HTDR-610M and Longi Solar LR7-72HTDR-615M bifacial panels?
Both Longi Solar LR7-72HTDR-610M and Longi Solar LR7-72HTDR-615M are bifacial - they capture reflected light from the ground, which can add 5-15% more annual energy on ground-mount or elevated rooftop installations with a light surface beneath.

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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.