LP182*199-M-66-NB 590W vs LR8-66HGD-620M 11 of 19 identical Swap Change panels

Leapton LP182*199-M-66-NB 590W vs Longi Solar LR8-66HGD-620M

Q: Which panel is better: Leapton LP182*199-M-66-NB 590W or Longi Solar LR8-66HGD-620M?

According to our database: Longi Solar LR8-66HGD-620M has higher module efficiency (23.00% vs 22.83%); Longi Solar LR8-66HGD-620M tolerates heat better (temp coeff -0.280%/°C vs -0.300%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.

Q: What is the efficiency of Leapton LP182*199-M-66-NB 590W and Longi Solar LR8-66HGD-620M?

Leapton LP182*199-M-66-NB 590W has a module efficiency of 22.83%, while Longi Solar LR8-66HGD-620M is 23.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does Leapton LP182*199-M-66-NB 590W use vs Longi Solar LR8-66HGD-620M?

Leapton LP182*199-M-66-NB 590W uses TOPCon cells; Longi Solar LR8-66HGD-620M uses Back Contact. Modern n-type technologies (TOPCon, HJT, BC) typically deliver higher efficiency and lower degradation compared to older PERC (p-type) cells.

Q: What is the warranty on Leapton LP182*199-M-66-NB 590W and Longi Solar LR8-66HGD-620M?

Leapton LP182*199-M-66-NB 590W has a 30 years power warranty; Longi Solar LR8-66HGD-620M 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.

Q: Are Leapton LP182*199-M-66-NB 590W and Longi Solar LR8-66HGD-620M bifacial panels?

Both Leapton LP182*199-M-66-NB 590W and Longi Solar LR8-66HGD-620M 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.

Leapton

LP182*199-M-66-NB 590W

590 Wp 22.83 % TOPCon Bifacial

Open panel page Datasheet PDF

LR8-66HGD-620M

620 Wp 23.00 % Back Contact Bifacial

Open panel page Datasheet PDF

The verdict

LR8-66HGD-620M leads on the differences that matter

The largest is rated power: 30 W more power. 11 of 19 comparable parameters are identical.

See all 8 differences

How alike are they

11 of 19 comparable
parameters are identical

identical differs

What actually differs

8 of 19 parameters

Parameter LP182*199-M-66-NB 590W LR8-66HGD-620M Difference

Rated power 590 Wp 620 Wp 30 W more power

Product warranty 25 yrs 12 yrs 13 yrs longer

Temperature coefficient -0.300 %/°C -0.280 %/°C 0.020 %/°C better in heat

Module area 2.584 m² 2.701 m² 0.117 m² apart

Cell technology TOPCon Back Contact TOPCon vs Back Contact

Short-circuit current 15.32 A 16.05 A 0.73 A apart

Dimensions 2279x1134x30 mm 2382x1134x30 mm 2279x1134x30 mm vs 2382x1134x30 mm

Current at max power 14.49 A 15.16 A 0.67 A apart

What it means on a roof

Thirty years of production

Each panel's own declared degradation curve, at 1,200 kWh/kWp a year

Cell temperature

LP182*199-M-66-NB 590W

19,796 kWh

LR8-66HGD-620M

20,802 kWh

Lifetime gap

1,006 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario LP182*199-M-66-NB 590W LR8-66HGD-620M

Standard test conditions 25 °C 100.0% of rated power 590 W 620 W

Cool, bright day 40 °C 95.5% of rated power 563 W 594 W

Typical summer roof 55 °C 91.0% of rated power 537 W 568 W

Hot roof 70 °C 86.5% of rated power 510 W 542 W

Full specification

Parameter LP182*199-M-66-NB 590W LR8-66HGD-620M Difference

Power and efficiency

Rated power 590 Wp 620 Wp +30 W for LR8-66HGD-620M

Module efficiency 22.83 % 23.00 % Effectively the same

Power density 228.3 Wp/m² 229.5 Wp/m² Effectively the same

Open-circuit voltage 48.62 V 48.78 V Effectively the same

Voltage at max power 40.72 V 40.91 V Effectively the same

Short-circuit current 15.32 A 16.05 A 0.73 A apart

Current at max power 14.49 A 15.16 A 0.67 A apart

Temperature

Temperature coefficient -0.300 %/°C -0.280 %/°C +0.020 %/°C for LR8-66HGD-620M

Mechanical

Dimensions 2279x1134x30 mm 2382x1134x30 mm 2279x1134x30 mm vs 2382x1134x30 mm

Module area 2.584 m² 2.701 m² 0.117 m² apart

Weight 32.0 kg 32.5 kg Effectively the same

Weight per kWp 54.2 kg/kWp 52.4 kg/kWp Effectively the same

Warranty and degradation

Product warranty 25 yrs 12 yrs +13 yrs for LP182*199-M-66-NB 590W

Performance warranty 30 yrs 30 yrs Same

Annual degradation 0.40 %/yr 0.40 %/yr Same

Technology

Cell technology TOPCon Back Contact TOPCon vs Back Contact

Cell type Monocrystalline Monocrystalline Same

Cell count 132 132 Same

Bifacial Yes Yes Same

Against the whole database

14,005 panels

Efficiency

#2,683 vs #1,919

LR8-66HGD-620M leads by 764 places

Power density

#2,731 vs #2,191

LR8-66HGD-620M leads by 540 places

Heat behaviour

#6,093 vs #1,309

LR8-66HGD-620M leads by 4,784 places

Weight

#8,477 vs #5,893

LR8-66HGD-620M leads by 2,584 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#1,591 vs #2,525

LP182*199-M-66-NB 590W leads by 934 places

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The same specification on paper

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Longi Solar LR8-66HGD-620M vs Longi Solar LR8-66HGD-615M

One difference: module efficiency

Written summary

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Questions about this pairing

Which panel is better: Leapton LP182*199-M-66-NB 590W or Longi Solar LR8-66HGD-620M?

According to our database: Longi Solar LR8-66HGD-620M has higher module efficiency (23.00% vs 22.83%); Longi Solar LR8-66HGD-620M tolerates heat better (temp coeff -0.280%/°C vs -0.300%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.

What is the efficiency of Leapton LP182*199-M-66-NB 590W and Longi Solar LR8-66HGD-620M?

Leapton LP182*199-M-66-NB 590 W has a module efficiency of 22.83%, while Longi Solar LR8-66HGD-620M is 23.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

What cell technology does Leapton LP182*199-M-66-NB 590W use vs Longi Solar LR8-66HGD-620M?

Leapton LP182*199-M-66-NB 590 W uses TOPCon cells; Longi Solar LR8-66HGD-620M uses Back Contact. 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 Leapton LP182*199-M-66-NB 590W and Longi Solar LR8-66HGD-620M?

Leapton LP182*199-M-66-NB 590 W has a 30 years power warranty; Longi Solar LR8-66HGD-620M 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 Leapton LP182*199-M-66-NB 590W and Longi Solar LR8-66HGD-620M bifacial panels?

Both Leapton LP182*199-M-66-NB 590 W and Longi Solar LR8-66HGD-620M 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.

Compare Leapton and Longi Solar as manufacturers Portfolio, efficiency, cell technologies and warranty terms

Shop prices: See 8 Leapton offers · 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.