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72HTD-580M vs 72HTH-585M 13 of 18 identical Swap Change panels

Longi Solar LR5-72HTD-580M vs Longi Solar LR5-72HTH-585M

Longi Solar LR5-72HTD-580M
LR5-72HTD-580M
580 Wp 22.50 % Bifacial
Open panel page Datasheet PDF
VS
Longi Solar LR5-72HTH-585M
LR5-72HTH-585M
585 Wp 22.60 %
Open panel page Datasheet PDF
The verdict

5 differences, and they point both ways

The largest is performance warranty: 5 yrs longer. 13 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See all 5 differences
How alike are they
13 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

5 of 18 parameters
Parameter 72HTD-580M 72HTH-585M Difference
Performance warranty 30 yrs 25 yrs 5 yrs longer
Weight 31.8 kg 27.2 kg 4.6 kg lighter
Weight per kWp 54.8 kg/kWp 46.5 kg/kWp 8.3 kg/kWp lighter
Temperature coefficient -0.280 %/°C -0.290 %/°C 0.010 %/°C better in heat
Bifacial Yes No Yes vs No
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
72HTD-580M
19,356 kWh
72HTH-585M
19,523 kWh
Lifetime gap
167 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 72HTD-580M 72HTH-585M
Standard test conditions 25 °C 100.0% of rated power 580 W 585 W
Cool, bright day 40 °C 95.7% of rated power 556 W 560 W
Typical summer roof 55 °C 91.3% of rated power 531 W 534 W
Hot roof 70 °C 87.0% of rated power 507 W 509 W
03

Full specification

Parameter 72HTD-580M 72HTH-585M Difference
Power and efficiency
Rated power 580 Wp 585 Wp Effectively the same
Module efficiency 22.50 % 22.60 % Effectively the same
Power density 224.5 Wp/m² 226.5 Wp/m² Effectively the same
Open-circuit voltage 52.30 V 52.36 V Effectively the same
Voltage at max power 43.85 V 44.21 V Effectively the same
Short-circuit current 14.13 A 14.27 A Effectively the same
Current at max power 13.23 A 13.24 A Effectively the same
Temperature
Temperature coefficient -0.280 %/°C -0.290 %/°C +0.010 %/°C for 72HTD-580M
Mechanical
Dimensions 2278x1134x30 mm 2278x1134x30 mm Same
Module area 2.583 m² 2.583 m² Same
Weight 31.8 kg 27.2 kg -4.6 kg for 72HTH-585M
Weight per kWp 54.8 kg/kWp 46.5 kg/kWp -8.3 kg/kWp for 72HTH-585M
Warranty and degradation
Product warranty 15 yrs 15 yrs Same
Performance warranty 30 yrs 25 yrs +5 yrs for 72HTD-580M
Annual degradation 0.40 %/yr 0.40 %/yr Same
Technology
Cell technology - - Neither datasheet publishes this
Cell type Monocrystalline Monocrystalline Same
Cell count 144 144 Same
Bifacial Yes No Yes vs No
04

Against the whole database

14,129 panels
Efficiency
#4,281 vs #3,716
72HTH-585M leads by 565 places
Power density
#4,607 vs #3,557
72HTH-585M leads by 1,050 places
Heat behaviour
#1,347 vs #2,220
72HTD-580M leads by 873 places
Weight
#9,304 vs #1,186
72HTH-585M leads by 8,118 places
Warranty
#21 vs #9,912
72HTD-580M leads by 9,891 places
Overall
#3,946 vs #4,515
72HTD-580M leads by 569 places
05

More useful comparisons

Open the full database
Same series, other bin
Longi Solar LR5-72HTD-580M vs Longi Solar LR7-72HTH-615M
11 differences, the largest is performance warranty
Same series, other bin
Longi Solar LR5-72HTD-580M vs Longi Solar LR7-72HTH-610M
9 differences, the largest is performance warranty
Same series, other bin
Longi Solar LR5-72HTD-580M vs Longi Solar LR7-72HTH-605M
9 differences, the largest is performance warranty
Same series, other bin
Longi Solar LR5-72HTD-580M vs Longi Solar LR5-72HTD-585M
The same specification on paper
Same series, other bin
Longi Solar LR5-72HTD-580M vs Longi Solar LR5-72HTH-580M
5 differences, the largest is performance warranty
Same series, other bin
Longi Solar LR5-72HTD-580M vs Longi Solar LR5-72HTD-575M
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Longi Solar LR5-72HTD-580M or Longi Solar LR5-72HTH-585M?
According to our database: Longi Solar LR5-72HTH-585M has higher module efficiency (22.60% vs 22.50%); Longi Solar LR5-72HTD-580M tolerates heat better (temp coeff -0.280%/°C vs -0.290%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Longi Solar LR5-72HTD-580M and Longi Solar LR5-72HTH-585M?
Longi Solar LR5-72HTD-580M has a module efficiency of 22.50%, while Longi Solar LR5-72HTH-585M is 22.60%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Longi Solar LR5-72HTD-580M use vs Longi Solar LR5-72HTH-585M?
Longi Solar LR5-72HTD-580M uses Monocrystalline cells; Longi Solar LR5-72HTH-585M 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 LR5-72HTD-580M and Longi Solar LR5-72HTH-585M?
Longi Solar LR5-72HTD-580M has a 30 years power warranty; Longi Solar LR5-72HTH-585M 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.
Are Longi Solar LR5-72HTD-580M and Longi Solar LR5-72HTH-585M bifacial panels?
Longi Solar LR5-72HTD-580M is bifacial (captures light from both faces); Longi Solar LR5-72HTH-585M is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

Shop prices: See 157 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.