BH-635W vs BH 650W 15 of 19 identical Swap Change panels

Astronergy CHSM78N(DG)/F-BH-635W vs Astronergy CHSM78N(DG)/F-BH 650W

Q: Which panel is better: Astronergy CHSM78N(DG)/F-BH-635W or Astronergy CHSM78N(DG)/F-BH 650W?

According to our database: Astronergy CHSM78N(DG)/F-BH 650W has higher module efficiency (23.30% vs 22.70%). See the full spec comparison and 30-year energy simulation above for a complete picture.

Q: What is the efficiency of Astronergy CHSM78N(DG)/F-BH-635W and Astronergy CHSM78N(DG)/F-BH 650W?

Astronergy CHSM78N(DG)/F-BH-635W has a module efficiency of 22.70%, while Astronergy CHSM78N(DG)/F-BH 650W is 23.30%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does Astronergy CHSM78N(DG)/F-BH-635W use vs Astronergy CHSM78N(DG)/F-BH 650W?

Astronergy CHSM78N(DG)/F-BH-635W uses TOPCon cells; Astronergy CHSM78N(DG)/F-BH 650W uses TOPCon. 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 Astronergy CHSM78N(DG)/F-BH-635W and Astronergy CHSM78N(DG)/F-BH 650W?

Astronergy CHSM78N(DG)/F-BH-635W has a 30 years power warranty; Astronergy CHSM78N(DG)/F-BH 650W 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 Astronergy CHSM78N(DG)/F-BH-635W and Astronergy CHSM78N(DG)/F-BH 650W bifacial panels?

Both Astronergy CHSM78N(DG)/F-BH-635W and Astronergy CHSM78N(DG)/F-BH 650W 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.

CHSM78N(DG)/F-BH-635W

635 Wp 22.70 % TOPCon Bifacial

Open panel page Datasheet PDF

CHSM78N(DG)/F-BH 650W

650 Wp 23.30 % TOPCon Bifacial

Open panel page Datasheet PDF

The verdict

BH 650W leads on the differences that matter

The largest is module efficiency: 0.60 pp more efficient. 15 of 19 comparable parameters are identical.

See all 4 differences

How alike are they

15 of 19 comparable
parameters are identical

identical differs

What actually differs

4 of 19 parameters

Parameter BH-635W BH 650W Difference

Module efficiency 22.70 % 23.30 % 0.60 pp more efficient

Power density 227.2 Wp/m² 232.5 Wp/m² 5.4 Wp/m² higher

Rated power 635 Wp 650 Wp 15 W more power

Voltage at max power 46.62 V 48.20 V 1.58 V 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

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.

BH-635W

21,306 kWh

BH 650W

21,809 kWh

Lifetime gap

503 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario BH-635W BH 650W

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

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

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

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

Full specification

Parameter BH-635W BH 650W Difference

Power and efficiency

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

Module efficiency 22.70 % 23.30 % +0.60 pp for BH 650W

Power density 227.2 Wp/m² 232.5 Wp/m² +5.4 Wp/m² for BH 650W

Open-circuit voltage 56.41 V 57.28 V Effectively the same

Voltage at max power 46.62 V 48.20 V 1.58 V apart

Short-circuit current 14.27 A 14.26 A Effectively the same

Current at max power 13.62 A 13.49 A Effectively the same

Temperature

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

Mechanical

Dimensions 2465x1134x30 mm 2465x1134x30 mm Same

Module area 2.795 m² 2.795 m² Same

Weight 34.7 kg 34.7 kg Same

Weight per kWp 54.6 kg/kWp 53.4 kg/kWp Effectively the same

Warranty and degradation

Product warranty 15 yrs 15 yrs Same

Performance warranty 30 yrs 30 yrs Same

Annual degradation 0.40 %/yr 0.40 %/yr Same

Technology

Cell technology TOPCon TOPCon Same

Cell type Monocrystalline Monocrystalline Same

Cell count 156 156 Same

Bifacial Yes Yes Same

Against the whole database

14,005 panels

Efficiency

#3,307 vs #1,017

BH 650W leads by 2,290 places

Power density

#3,252 vs #1,222

BH 650W leads by 2,030 places

Heat behaviour

#2,165 vs #2,165

Tied - the same position in the database

Weight

#9,020 vs #7,283

BH 650W leads by 1,737 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#1,931 vs #1,318

BH 650W leads by 613 places

More useful comparisons

Open the full database

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Astronergy CHSM78N(DG)/F-BH-635W vs Astronergy CHSM78N(DG)/F-BH-650W

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Astronergy CHSM78N(DG)/F-BH-635W vs Astronergy CHSM78N(DG)/F-BH-645W

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Astronergy CHSM78N(DG)/F-BH-635W vs Astronergy CHSM78N(DG)/F-BH 640W

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Same series, other bin

Astronergy CHSM78N(DG)/F-BH-635W vs Astronergy CHSM78N(DG)/F-BH-640W

One difference: module efficiency

Same series, other bin

Astronergy CHSM78N(DG)/F-BH-635W vs Astronergy CHSM78N(DG)/F-BH 635W

One difference: voltage at max power

Written summary

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Questions about this pairing

Which panel is better: Astronergy CHSM78N(DG)/F-BH-635W or Astronergy CHSM78N(DG)/F-BH 650W?

According to our database: Astronergy CHSM78N(DG)/F-BH 650 W has higher module efficiency (23.30% vs 22.70%). See the full spec comparison and 30-year energy simulation above for a complete picture.

What is the efficiency of Astronergy CHSM78N(DG)/F-BH-635W and Astronergy CHSM78N(DG)/F-BH 650W?

Astronergy CHSM78N(DG)/F-BH-635 W has a module efficiency of 22.70%, while Astronergy CHSM78N(DG)/F-BH 650 W is 23.30%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

What cell technology does Astronergy CHSM78N(DG)/F-BH-635W use vs Astronergy CHSM78N(DG)/F-BH 650W?

Astronergy CHSM78N(DG)/F-BH-635 W uses TOPCon cells; Astronergy CHSM78N(DG)/F-BH 650 W uses TOPCon. 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 Astronergy CHSM78N(DG)/F-BH-635W and Astronergy CHSM78N(DG)/F-BH 650W?

Astronergy CHSM78N(DG)/F-BH-635 W has a 30 years power warranty; Astronergy CHSM78N(DG)/F-BH 650 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 Astronergy CHSM78N(DG)/F-BH-635W and Astronergy CHSM78N(DG)/F-BH 650W bifacial panels?

Both Astronergy CHSM78N(DG)/F-BH-635 W and Astronergy CHSM78N(DG)/F-BH 650 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 41 Astronergy 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.