CHSM54N-HC-425W vs CHSM66N(DG)/F-BH-735 7 of 19 identical Swap Change panels

Astronergy CHSM54N-HC-425W vs Astronergy CHSM66N(DG)/F-BH-735

Q: Which panel is better: Astronergy CHSM54N-HC-425W or Astronergy CHSM66N(DG)/F-BH-735?

According to our database: Astronergy CHSM66N(DG)/F-BH-735 has higher module efficiency (23.70% vs 21.80%). See the full spec comparison and 30-year energy simulation above for a complete picture.

Q: What is the efficiency of Astronergy CHSM54N-HC-425W and Astronergy CHSM66N(DG)/F-BH-735?

Astronergy CHSM54N-HC-425W has a module efficiency of 21.80%, while Astronergy CHSM66N(DG)/F-BH-735 is 23.70%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does Astronergy CHSM54N-HC-425W use vs Astronergy CHSM66N(DG)/F-BH-735?

Astronergy CHSM54N-HC-425W uses TOPCon cells; Astronergy CHSM66N(DG)/F-BH-735 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 CHSM54N-HC-425W and Astronergy CHSM66N(DG)/F-BH-735?

Astronergy CHSM54N-HC-425W has a 30 years power warranty; Astronergy CHSM66N(DG)/F-BH-735 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 CHSM54N-HC-425W and Astronergy CHSM66N(DG)/F-BH-735 bifacial panels?

Astronergy CHSM66N(DG)/F-BH-735 is bifacial (captures light from both faces); Astronergy CHSM54N-HC-425W is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

CHSM54N-HC-425W

425 Wp 21.80 % TOPCon

Open panel page Datasheet PDF

CHSM66N(DG)/F-BH-735

735 Wp 23.70 % TOPCon Bifacial

Open panel page Datasheet PDF

The verdict

CHSM66N(DG)/F-BH-735 leads on the differences that matter

The largest is module efficiency: 1.90 pp more efficient. 7 of 19 comparable parameters are identical.

See all 12 differences

How alike are they

7 of 19 comparable
parameters are identical

identical differs

What actually differs

12 of 19 parameters

Parameter CHSM54N-HC-425W CHSM66N(DG)/F-BH-735 Difference

Module efficiency 21.80 % 23.70 % 1.90 pp more efficient

Rated power 425 Wp 735 Wp 310 W more power

Power density 217.6 Wp/m² 236.6 Wp/m² 19.0 Wp/m² higher

Weight 21.3 kg 38.0 kg 16.7 kg lighter

Open-circuit voltage 38.20 V 49.77 V 11.57 V apart

Short-circuit current 13.98 A 18.72 A 4.74 A apart

Module area 1.953 m² 3.106 m² 1.154 m² apart

Voltage at max power 32.10 V 41.41 V 9.31 V apart

Current at max power 13.24 A 17.75 A 4.51 A apart

Cell count 108 132 24 cells apart

Bifacial No Yes No vs Yes

Dimensions 1722x1134x30 mm 2384x1303x33 mm 1722x1134x30 mm vs 2384x1303x33 mm

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.

CHSM54N-HC-425W

14,260 kWh

CHSM66N(DG)/F-BH-735

24,661 kWh

Lifetime gap

10,401 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario CHSM54N-HC-425W CHSM66N(DG)/F-BH-735

Standard test conditions 25 °C 100.0% of rated power 425 W 735 W

Cool, bright day 40 °C 95.7% of rated power 407 W 703 W

Typical summer roof 55 °C 91.3% of rated power 388 W 671 W

Hot roof 70 °C 87.0% of rated power 370 W 639 W

Full specification

Parameter CHSM54N-HC-425W CHSM66N(DG)/F-BH-735 Difference

Power and efficiency

Rated power 425 Wp 735 Wp +310 W for CHSM66N(DG)/F-BH-735

Module efficiency 21.80 % 23.70 % +1.90 pp for CHSM66N(DG)/F-BH-735

Power density 217.6 Wp/m² 236.6 Wp/m² +19.0 Wp/m² for CHSM66N(DG)/F-BH-735

Open-circuit voltage 38.20 V 49.77 V 11.57 V apart

Voltage at max power 32.10 V 41.41 V 9.31 V apart

Short-circuit current 13.98 A 18.72 A 4.74 A apart

Current at max power 13.24 A 17.75 A 4.51 A apart

Temperature

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

Mechanical

Dimensions 1722x1134x30 mm 2384x1303x33 mm 1722x1134x30 mm vs 2384x1303x33 mm

Module area 1.953 m² 3.106 m² 1.154 m² apart

Weight 21.3 kg 38.0 kg -16.7 kg for CHSM54N-HC-425W

Weight per kWp 50.1 kg/kWp 51.7 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 108 132 24 cells apart

Bifacial No Yes No vs Yes

Against the whole database

14,005 panels

Efficiency

#7,022 vs #517

CHSM66N(DG)/F-BH-735 leads by 6,505 places

Power density

#7,172 vs #582

CHSM66N(DG)/F-BH-735 leads by 6,590 places

Heat behaviour

#2,165 vs #2,165

Tied - the same position in the database

Weight

#3,619 vs #5,081

CHSM54N-HC-425W leads by 1,462 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#9,874 vs #160

CHSM66N(DG)/F-BH-735 leads by 9,714 places

More useful comparisons

Open the full database

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Astronergy CHSM54N-HC-425W vs Astronergy CHSM54N-HC-440W

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Astronergy CHSM54N-HC-425W vs Astronergy CHSM54N-HC-435W

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Astronergy CHSM54N-HC-425W vs Astronergy CHSM54N-HC-430W

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One difference: module efficiency

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Astronergy CHSM66N(DG)/F-BH-735 vs Astronergy CHSM66N(DG)/F-BH-725

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Written summary

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Questions about this pairing

Which panel is better: Astronergy CHSM54N-HC-425W or Astronergy CHSM66N(DG)/F-BH-735?

According to our database: Astronergy CHSM66N(DG)/F-BH-735 has higher module efficiency (23.70% vs 21.80%). See the full spec comparison and 30-year energy simulation above for a complete picture.

What is the efficiency of Astronergy CHSM54N-HC-425W and Astronergy CHSM66N(DG)/F-BH-735?

Astronergy CHSM54N-HC-425 W has a module efficiency of 21.80%, while Astronergy CHSM66N(DG)/F-BH-735 is 23.70%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

What cell technology does Astronergy CHSM54N-HC-425W use vs Astronergy CHSM66N(DG)/F-BH-735?

Astronergy CHSM54N-HC-425 W uses TOPCon cells; Astronergy CHSM66N(DG)/F-BH-735 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 CHSM54N-HC-425W and Astronergy CHSM66N(DG)/F-BH-735?

Astronergy CHSM54N-HC-425 W has a 30 years power warranty; Astronergy CHSM66N(DG)/F-BH-735 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 CHSM54N-HC-425W and Astronergy CHSM66N(DG)/F-BH-735 bifacial panels?

Astronergy CHSM66N(DG)/F-BH-735 is bifacial (captures light from both faces); Astronergy CHSM54N-HC-425 W is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

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.