655M vs 635M 16 of 19 identical Swap Change panels

Longi Solar LR7-72HYD-655M vs Longi Solar LR7-72HYD-635M

Q: Which panel is better: Longi Solar LR7-72HYD-655M or Longi Solar LR7-72HYD-635M?

According to our database: Longi Solar LR7-72HYD-655M has higher module efficiency (24.20% vs 23.50%). See the full spec comparison and 30-year energy simulation above for a complete picture.

Q: What is the efficiency of Longi Solar LR7-72HYD-655M and Longi Solar LR7-72HYD-635M?

Longi Solar LR7-72HYD-655M has a module efficiency of 24.20%, while Longi Solar LR7-72HYD-635M is 23.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does Longi Solar LR7-72HYD-655M use vs Longi Solar LR7-72HYD-635M?

Longi Solar LR7-72HYD-655M uses N-type cells; Longi Solar LR7-72HYD-635M uses N-type. 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 Longi Solar LR7-72HYD-655M and Longi Solar LR7-72HYD-635M?

Longi Solar LR7-72HYD-655M has a 30 years power warranty; Longi Solar LR7-72HYD-635M 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 Longi Solar LR7-72HYD-655M and Longi Solar LR7-72HYD-635M bifacial panels?

Both Longi Solar LR7-72HYD-655M and Longi Solar LR7-72HYD-635M 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.

LR7-72HYD-655M

655 Wp 24.20 % N-type Bifacial

Open panel page Datasheet PDF

LR7-72HYD-635M

635 Wp 23.50 % N-type Bifacial

Open panel page Datasheet PDF

The verdict

655M leads on the differences that matter

The largest is module efficiency: 0.70 pp more efficient. 16 of 19 comparable parameters are identical.

See all 3 differences

How alike are they

16 of 19 comparable
parameters are identical

identical differs

What actually differs

3 of 19 parameters

Parameter 655M 635M Difference

Module efficiency 24.20 % 23.50 % 0.70 pp more efficient

Power density 242.5 Wp/m² 235.1 Wp/m² 7.4 Wp/m² higher

Rated power 655 Wp 635 Wp 20 W more power

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

Same temp coeff. for both panels (-0.260 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.

655M

22,148 kWh

635M

21,471 kWh

Lifetime gap

677 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario 655M 635M

Standard test conditions 25 °C 100.0% of rated power 655 W 635 W

Cool, bright day 40 °C 96.1% of rated power 629 W 610 W

Typical summer roof 55 °C 92.2% of rated power 604 W 585 W

Hot roof 70 °C 88.3% of rated power 578 W 561 W

Full specification

Parameter 655M 635M Difference

Power and efficiency

Rated power 655 Wp 635 Wp +20 W for 655M

Module efficiency 24.20 % 23.50 % +0.70 pp for 655M

Power density 242.5 Wp/m² 235.1 Wp/m² +7.4 Wp/m² for 655M

Open-circuit voltage 54.32 V 53.92 V Effectively the same

Voltage at max power 44.97 V 44.57 V Effectively the same

Short-circuit current 15.22 A 14.89 A Effectively the same

Current at max power 14.57 A 14.25 A Effectively the same

Temperature

Temperature coefficient -0.260 %/°C -0.260 %/°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 51.1 kg/kWp 52.8 kg/kWp Effectively the same

Warranty and degradation

Product warranty 12 yrs 12 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

Against the whole database

14,005 panels

Efficiency

#184 vs #716

655M leads by 532 places

Power density

#172 vs #741

655M leads by 569 places

Heat behaviour

#511 vs #511

Tied - the same position in the database

Weight

#4,503 vs #6,429

655M leads by 1,926 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#1,007 vs #1,750

655M leads by 743 places

More useful comparisons

Open the full database

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Longi Solar LR7-72HYD-655M vs Longi Solar LR7-72HYD-660M

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The same specification on paper

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Longi Solar LR7-72HYD-655M vs Longi Solar LR7-72HYD-645M

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Longi Solar LR7-72HYD-655M vs Longi Solar LR7-72HYD-640M

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Longi Solar LR7-72HYD-655M vs Longi Solar LR7-72HYD-630M

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Longi Solar LR7-72HYD-655M vs Longi Solar LR7-72HYD-625M

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Written summary

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Questions about this pairing

Which panel is better: Longi Solar LR7-72HYD-655M or Longi Solar LR7-72HYD-635M?

According to our database: Longi Solar LR7-72HYD-655M has higher module efficiency (24.20% vs 23.50%). See the full spec comparison and 30-year energy simulation above for a complete picture.

What is the efficiency of Longi Solar LR7-72HYD-655M and Longi Solar LR7-72HYD-635M?

Longi Solar LR7-72HYD-655M has a module efficiency of 24.20%, while Longi Solar LR7-72HYD-635M is 23.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

What cell technology does Longi Solar LR7-72HYD-655M use vs Longi Solar LR7-72HYD-635M?

Longi Solar LR7-72HYD-655M uses N-type cells; Longi Solar LR7-72HYD-635M 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 LR7-72HYD-655M and Longi Solar LR7-72HYD-635M?

Longi Solar LR7-72HYD-655M has a 30 years power warranty; Longi Solar LR7-72HYD-635M 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 LR7-72HYD-655M and Longi Solar LR7-72HYD-635M bifacial panels?

Both Longi Solar LR7-72HYD-655M and Longi Solar LR7-72HYD-635M 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.

Shop prices: 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.