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CHSM78N(DG)/F-BH 635W vs CHSM72N(DG)/F-BH-595 9 of 18 identical Swap Change panels

Astronergy CHSM78N(DG)/F-BH 635W vs Astronergy CHSM72N(DG)/F-BH-595

Astronergy CHSM78N(DG)/F-BH 635W
CHSM78N(DG)/F-BH 635W
635 Wp 22.70 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Astronergy CHSM72N(DG)/F-BH-595
CHSM72N(DG)/F-BH-595
595 Wp 23.00 % TOPCon Bifacial Incomplete
Open panel page Datasheet PDF
The verdict

9 differences, and they point both ways

The largest is rated power: 40 W more power. 9 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See all 9 differences
How alike are they
9 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

9 of 18 parameters
Parameter CHSM78N(DG)/F-BH 635W CHSM72N(DG)/F-BH-595 Difference
Rated power 635 Wp 595 Wp 40 W more power
Open-circuit voltage 56.68 V 51.90 V 4.78 V apart
Module area 2.795 m² 2.583 m² 0.212 m² apart
Weight 34.7 kg 32.1 kg 2.6 kg lighter
Module efficiency 22.70 % 23.00 % 0.30 pp more efficient
Power density 227.2 Wp/m² 230.3 Wp/m² 3.2 Wp/m² higher
Voltage at max power 47.68 V 43.61 V 4.07 V apart
Cell count 156 144 12 cells apart
Dimensions 2465x1134x30 mm 2278x1134x30 mm 2465x1134x30 mm vs 2278x1134x30 mm
02

What it means on a roof

Thirty years of production
A 1.0% first-year loss then 0.40% a year, assumed for both panels, at 1,200 kWh/kWp a year
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.
CHSM78N(DG)/F-BH 635W
21,306 kWh
CHSM72N(DG)/F-BH-595
19,963 kWh
Lifetime gap
1,343 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario CHSM78N(DG)/F-BH 635W CHSM72N(DG)/F-BH-595
Standard test conditions 25 °C 100.0% of rated power 635 W 595 W
Cool, bright day 40 °C 95.7% of rated power 607 W 569 W
Typical summer roof 55 °C 91.3% of rated power 580 W 543 W
Hot roof 70 °C 87.0% of rated power 552 W 517 W
03

Full specification

Parameter CHSM78N(DG)/F-BH 635W CHSM72N(DG)/F-BH-595 Difference
Power and efficiency
Rated power 635 Wp 595 Wp +40 W for CHSM78N(DG)/F-BH 635W
Module efficiency 22.70 % 23.00 % +0.30 pp for CHSM72N(DG)/F-BH-595
Power density 227.2 Wp/m² 230.3 Wp/m² +3.2 Wp/m² for CHSM72N(DG)/F-BH-595
Open-circuit voltage 56.68 V 51.90 V 4.78 V apart
Voltage at max power 47.68 V 43.61 V 4.07 V apart
Short-circuit current 14.08 A 14.53 A Effectively the same
Current at max power 13.32 A 13.64 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 2465x1134x30 mm 2278x1134x30 mm 2465x1134x30 mm vs 2278x1134x30 mm
Module area 2.795 m² 2.583 m² 0.212 m² apart
Weight 34.7 kg 32.1 kg -2.6 kg for CHSM72N(DG)/F-BH-595
Weight per kWp 54.6 kg/kWp 53.9 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 - Not published by Astronergy
Technology
Cell technology TOPCon TOPCon Same
Cell type Monocrystalline Monocrystalline Same
Cell count 156 144 12 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,129 panels
Efficiency
#3,364 vs #1,970
CHSM72N(DG)/F-BH-595 leads by 1,394 places
Power density
#3,309 vs #1,809
CHSM72N(DG)/F-BH-595 leads by 1,500 places
Heat behaviour
#2,220 vs #2,220
Tied - the same position in the database
Weight
#9,102 vs #8,225
CHSM72N(DG)/F-BH-595 leads by 877 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#1,957 vs #2,802
CHSM78N(DG)/F-BH 635W leads by 845 places
05

More useful comparisons

Open the full database
Same series, other bin
Astronergy CHSM78N(DG)/F-BH 635W vs Astronergy CHSM78N(DG)/F-BH 650W
3 differences, the largest is module efficiency
Same series, other bin
Astronergy CHSM78N(DG)/F-BH 635W vs Astronergy CHSM78N(DG)/F-BH-650W
3 differences, the largest is module efficiency
Same series, other bin
Astronergy CHSM78N(DG)/F-BH 635W vs Astronergy CHSM78N(DG)/F-BH 645W
3 differences, the largest is module efficiency
Same series, other bin
Astronergy CHSM78N(DG)/F-BH 635W vs Astronergy CHSM78N(DG)/F-BH-645W
3 differences, the largest is module efficiency
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-640W
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Astronergy CHSM78N(DG)/F-BH 635W or Astronergy CHSM72N(DG)/F-BH-595?
According to our database: Astronergy CHSM72N(DG)/F-BH-595 has higher module efficiency (23.00% 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 CHSM72N(DG)/F-BH-595?
Astronergy CHSM78N(DG)/F-BH 635 W has a module efficiency of 22.70%, while Astronergy CHSM72N(DG)/F-BH-595 is 23.00%. 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 CHSM72N(DG)/F-BH-595?
Astronergy CHSM78N(DG)/F-BH 635 W uses TOPCon cells; Astronergy CHSM72N(DG)/F-BH-595 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 CHSM72N(DG)/F-BH-595?
Astronergy CHSM78N(DG)/F-BH 635 W has a 30 years power warranty; Astronergy CHSM72N(DG)/F-BH-595 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 CHSM72N(DG)/F-BH-595 bifacial panels?
Both Astronergy CHSM78N(DG)/F-BH 635 W and Astronergy CHSM72N(DG)/F-BH-595 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.

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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.