650W vs 635W 16 of 19 identical Swap Change panels

Philadelphia Solar PS-MNB156(HCBF)-650W vs Philadelphia Solar PS-MNB156(HCBF)-635W

Q: What is the efficiency of Philadelphia Solar PS-MNB156(HCBF)-650W and Philadelphia Solar PS-MNB156(HCBF)-635W?

Philadelphia Solar PS-MNB156(HCBF)-650W has a module efficiency of 23.26%, while Philadelphia Solar PS-MNB156(HCBF)-635W is 22.75%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does Philadelphia Solar PS-MNB156(HCBF)-650W use vs Philadelphia Solar PS-MNB156(HCBF)-635W?

Philadelphia Solar PS-MNB156(HCBF)-650W uses N-type cells; Philadelphia Solar PS-MNB156(HCBF)-635W 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 Philadelphia Solar PS-MNB156(HCBF)-650W and Philadelphia Solar PS-MNB156(HCBF)-635W?

Philadelphia Solar PS-MNB156(HCBF)-650W has a 30 years power warranty; Philadelphia Solar PS-MNB156(HCBF)-635W 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 Philadelphia Solar PS-MNB156(HCBF)-650W and Philadelphia Solar PS-MNB156(HCBF)-635W bifacial panels?

Both Philadelphia Solar PS-MNB156(HCBF)-650W and Philadelphia Solar PS-MNB156(HCBF)-635W 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.

Philadelphia Solar

PS-MNB156(HCBF)-650W

650 Wp 23.26 % N-type Bifacial

Open panel page Datasheet PDF

Philadelphia Solar

PS-MNB156(HCBF)-635W

635 Wp 22.75 % N-type Bifacial

Open panel page Datasheet PDF

The verdict

650W leads on the differences that matter

The largest is module efficiency: 0.51 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 650W 635W Difference

Module efficiency 23.26 % 22.75 % 0.51 pp more efficient

Power density 232.6 Wp/m² 227.3 Wp/m² 5.4 Wp/m² higher

Rated power 650 Wp 635 Wp 15 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 (-0.290 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.

650W

21,809 kWh

635W

21,306 kWh

Lifetime gap

503 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario 650W 635W

Standard test conditions 25 °C 100.0% of rated power 650 W 635 W

Cool, bright day 40 °C 95.7% of rated power 622 W 607 W

Typical summer roof 55 °C 91.3% of rated power 593 W 580 W

Hot roof 70 °C 87.0% of rated power 565 W 552 W

Full specification

Parameter 650W 635W Difference

Power and efficiency

Rated power 650 Wp 635 Wp +15 W for 650W

Module efficiency 23.26 % 22.75 % +0.51 pp for 650W

Power density 232.6 Wp/m² 227.3 Wp/m² +5.4 Wp/m² for 650W

Open-circuit voltage 56.55 V 56.10 V Effectively the same

Voltage at max power 48.22 V 47.52 V Effectively the same

Short-circuit current 14.26 A 14.14 A Effectively the same

Current at max power 13.48 A 13.37 A Effectively the same

Temperature

Temperature coefficient -0.290 %/°C -0.290 %/°C Same

Mechanical

Dimensions 2464x1134x35 mm 2464x1134x35 mm Same

Module area 2.794 m² 2.794 m² Same

Weight 32.5 kg 32.5 kg Same

Weight per kWp 50.0 kg/kWp 51.2 kg/kWp Effectively the same

Warranty and degradation

Product warranty 12 yrs 12 yrs Same

Performance warranty 30 yrs 30 yrs Same

Annual degradation 0.40 %/yr 0.40 %/yr Same

Technology

Cell technology N-type N-type Same

Cell type Monocrystalline Monocrystalline Same

Cell count 156 156 Same

Bifacial Yes Yes Same

Against the whole database

14,005 panels

Efficiency

#1,237 vs #3,207

650W leads by 1,970 places

Power density

#1,218 vs #3,230

650W leads by 2,012 places

Heat behaviour

#2,165 vs #2,165

Tied - the same position in the database

Weight

#3,317 vs #4,557

650W leads by 1,240 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#1,621 vs #2,296

650W leads by 675 places

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Written summary

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Questions about this pairing

Which panel is better: Philadelphia Solar PS-MNB156(HCBF)-650W or Philadelphia Solar PS-MNB156(HCBF)-635W?

According to our database: Philadelphia Solar PS-MNB156(HCBF)-650 W has higher module efficiency (23.26% vs 22.75%). See the full spec comparison and 30-year energy simulation above for a complete picture.

What is the efficiency of Philadelphia Solar PS-MNB156(HCBF)-650W and Philadelphia Solar PS-MNB156(HCBF)-635W?

Philadelphia Solar PS-MNB156(HCBF)-650 W has a module efficiency of 23.26%, while Philadelphia Solar PS-MNB156(HCBF)-635 W is 22.75%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

What cell technology does Philadelphia Solar PS-MNB156(HCBF)-650W use vs Philadelphia Solar PS-MNB156(HCBF)-635W?

Philadelphia Solar PS-MNB156(HCBF)-650 W uses N-type cells; Philadelphia Solar PS-MNB156(HCBF)-635 W 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 Philadelphia Solar PS-MNB156(HCBF)-650W and Philadelphia Solar PS-MNB156(HCBF)-635W?

Philadelphia Solar PS-MNB156(HCBF)-650 W has a 30 years power warranty; Philadelphia Solar PS-MNB156(HCBF)-635 W 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 Philadelphia Solar PS-MNB156(HCBF)-650W and Philadelphia Solar PS-MNB156(HCBF)-635W bifacial panels?

Both Philadelphia Solar PS-MNB156(HCBF)-650 W and Philadelphia Solar PS-MNB156(HCBF)-635 W 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 6 Philadelphia 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.