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CHSM78N(DG)/F-BH-645 vs CHSM72N(DG)/F-BH 600 12 of 19 identical Swap Change panels

Astronergy CHSM78N(DG)/F-BH-645 vs Astronergy CHSM72N(DG)/F-BH 600

Astronergy CHSM78N(DG)/F-BH-645
CHSM78N(DG)/F-BH-645
645 Wp 23.10 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Astronergy CHSM72N(DG)/F-BH 600
CHSM72N(DG)/F-BH 600
600 Wp 23.20 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

CHSM78N(DG)/F-BH-645 leads on the differences that matter

The largest is rated power: 45 W more power. 12 of 19 comparable parameters are identical.

See all 7 differences
How alike are they
12 of 19 comparable
parameters are identical
identical differs
01

What actually differs

7 of 19 parameters
Parameter CHSM78N(DG)/F-BH-645 CHSM72N(DG)/F-BH 600 Difference
Rated power 645 Wp 600 Wp 45 W more power
Open-circuit voltage 56.81 V 52.10 V 4.71 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
Cell count 156 144 12 cells apart
Voltage at max power 46.95 V 43.78 V 3.17 V apart
Dimensions 2465x1134x30 mm 2278x1134x30 mm 2465x1134x30 mm vs 2278x1134x30 mm
02

What it means on a roof

Thirty years of production
Each panel's own declared degradation curve, 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-645
21,641 kWh
CHSM72N(DG)/F-BH 600
20,131 kWh
Lifetime gap
1,510 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario CHSM78N(DG)/F-BH-645 CHSM72N(DG)/F-BH 600
Standard test conditions 25 °C 100.0% of rated power 645 W 600 W
Cool, bright day 40 °C 95.7% of rated power 617 W 574 W
Typical summer roof 55 °C 91.3% of rated power 589 W 548 W
Hot roof 70 °C 87.0% of rated power 561 W 522 W
03

Full specification

Parameter CHSM78N(DG)/F-BH-645 CHSM72N(DG)/F-BH 600 Difference
Power and efficiency
Rated power 645 Wp 600 Wp +45 W for CHSM78N(DG)/F-BH-645
Module efficiency 23.10 % 23.20 % Effectively the same
Power density 230.7 Wp/m² 232.3 Wp/m² Effectively the same
Open-circuit voltage 56.81 V 52.10 V 4.71 V apart
Voltage at max power 46.95 V 43.78 V 3.17 V apart
Short-circuit current 14.43 A 14.61 A Effectively the same
Current at max power 13.74 A 13.70 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 600
Weight per kWp 53.8 kg/kWp 53.5 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 156 144 12 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#1,570 vs #1,306
CHSM72N(DG)/F-BH 600 leads by 264 places
Power density
#1,654 vs #1,252
CHSM72N(DG)/F-BH 600 leads by 402 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#7,876 vs #7,477
CHSM72N(DG)/F-BH 600 leads by 399 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#1,496 vs #2,413
CHSM78N(DG)/F-BH-645 leads by 917 places
05

More useful comparisons

Open the full database
Same series, other bin
Astronergy CHSM78N(DG)/F-BH-645 vs Astronergy CHSM78N(DG)/F-BH-650
One difference: module efficiency
Same series, other bin
Astronergy CHSM78N(DG)/F-BH-645 vs Astronergy CHSM78N(DG)/F-BH 650W
2 differences, the largest is module efficiency
Same series, other bin
Astronergy CHSM78N(DG)/F-BH-645 vs Astronergy CHSM78N(DG)/F-BH-650W
One difference: module efficiency
Same series, other bin
Astronergy CHSM78N(DG)/F-BH-645 vs Astronergy CHSM78N(DG)/F-BH 645W
One difference: voltage at max power
Same series, other bin
Astronergy CHSM78N(DG)/F-BH-645 vs Astronergy CHSM78N(DG)/F-BH-645W
The same specification on paper
Same series, other bin
Astronergy CHSM78N(DG)/F-BH-645 vs Astronergy CHSM78N(DG)/F-BH-640
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Astronergy CHSM78N(DG)/F-BH-645 or Astronergy CHSM72N(DG)/F-BH 600?
According to our database: Astronergy CHSM72N(DG)/F-BH 600 has higher module efficiency (23.20% vs 23.10%). 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-645 and Astronergy CHSM72N(DG)/F-BH 600?
Astronergy CHSM78N(DG)/F-BH-645 has a module efficiency of 23.10%, while Astronergy CHSM72N(DG)/F-BH 600 is 23.20%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Astronergy CHSM78N(DG)/F-BH-645 use vs Astronergy CHSM72N(DG)/F-BH 600?
Astronergy CHSM78N(DG)/F-BH-645 uses TOPCon cells; Astronergy CHSM72N(DG)/F-BH 600 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-645 and Astronergy CHSM72N(DG)/F-BH 600?
Astronergy CHSM78N(DG)/F-BH-645 has a 30 years power warranty; Astronergy CHSM72N(DG)/F-BH 600 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-645 and Astronergy CHSM72N(DG)/F-BH 600 bifacial panels?
Both Astronergy CHSM78N(DG)/F-BH-645 and Astronergy CHSM72N(DG)/F-BH 600 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.