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CHSM72N-HC-580 vs CHSM66N(DG)/F-BH-720 5 of 19 identical Swap Change panels

Astronergy CHSM72N-HC-580 vs Astronergy CHSM66N(DG)/F-BH-720

Astronergy CHSM72N-HC-580
CHSM72N-HC-580
580 Wp 22.50 % TOPCon
Open panel page Datasheet PDF
VS
Astronergy CHSM66N(DG)/F-BH-720
CHSM66N(DG)/F-BH-720
720 Wp 23.20 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

CHSM66N(DG)/F-BH-720 leads on the differences that matter

The largest is module efficiency: 0.70 pp more efficient. 5 of 19 comparable parameters are identical.

See all 14 differences
How alike are they
5 of 19 comparable
parameters are identical
identical differs
01

What actually differs

14 of 19 parameters
Parameter CHSM72N-HC-580 CHSM66N(DG)/F-BH-720 Difference
Module efficiency 22.50 % 23.20 % 0.70 pp more efficient
Rated power 580 Wp 720 Wp 140 W more power
Weight 26.9 kg 38.0 kg 11.1 kg lighter
Power density 224.5 Wp/m² 231.8 Wp/m² 7.3 Wp/m² higher
Weight per kWp 46.4 kg/kWp 52.8 kg/kWp 6.4 kg/kWp lighter
Product warranty 12 yrs 15 yrs 3 yrs longer
Short-circuit current 14.30 A 18.58 A 4.28 A apart
Module area 2.583 m² 3.106 m² 0.523 m² apart
Current at max power 13.61 A 17.64 A 4.03 A apart
Cell count 144 132 12 cells apart
Open-circuit voltage 51.15 V 49.17 V 1.98 V apart
Bifacial No Yes No vs Yes
Dimensions 2278x1134x35 mm 2384x1303x33 mm 2278x1134x35 mm vs 2384x1303x33 mm
Voltage at max power 42.63 V 40.81 V 1.82 V apart
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.
CHSM72N-HC-580
19,460 kWh
CHSM66N(DG)/F-BH-720
24,157 kWh
Lifetime gap
4,697 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario CHSM72N-HC-580 CHSM66N(DG)/F-BH-720
Standard test conditions 25 °C 100.0% of rated power 580 W 720 W
Cool, bright day 40 °C 95.7% of rated power 555 W 689 W
Typical summer roof 55 °C 91.3% of rated power 530 W 657 W
Hot roof 70 °C 87.0% of rated power 504 W 626 W
03

Full specification

Parameter CHSM72N-HC-580 CHSM66N(DG)/F-BH-720 Difference
Power and efficiency
Rated power 580 Wp 720 Wp +140 W for CHSM66N(DG)/F-BH-720
Module efficiency 22.50 % 23.20 % +0.70 pp for CHSM66N(DG)/F-BH-720
Power density 224.5 Wp/m² 231.8 Wp/m² +7.3 Wp/m² for CHSM66N(DG)/F-BH-720
Open-circuit voltage 51.15 V 49.17 V 1.98 V apart
Voltage at max power 42.63 V 40.81 V 1.82 V apart
Short-circuit current 14.30 A 18.58 A 4.28 A apart
Current at max power 13.61 A 17.64 A 4.03 A apart
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 2278x1134x35 mm 2384x1303x33 mm 2278x1134x35 mm vs 2384x1303x33 mm
Module area 2.583 m² 3.106 m² 0.523 m² apart
Weight 26.9 kg 38.0 kg -11.1 kg for CHSM72N-HC-580
Weight per kWp 46.4 kg/kWp 52.8 kg/kWp -6.4 kg/kWp for CHSM72N-HC-580
Warranty and degradation
Product warranty 12 yrs 15 yrs +3 yrs for CHSM66N(DG)/F-BH-720
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 144 132 12 cells apart
Bifacial No Yes No vs Yes
04

Against the whole database

14,005 panels
Efficiency
#4,222 vs #1,306
CHSM66N(DG)/F-BH-720 leads by 2,916 places
Power density
#4,547 vs #1,347
CHSM66N(DG)/F-BH-720 leads by 3,200 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#1,132 vs #6,459
CHSM72N-HC-580 leads by 5,327 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#4,367 vs #339
CHSM66N(DG)/F-BH-720 leads by 4,028 places
05

More useful comparisons

Open the full database
Same series, other bin
Astronergy CHSM72N-HC-580 vs Astronergy CHSM72N-HC-575
One difference: module efficiency
Same series, other bin
Astronergy CHSM72N-HC-580 vs Astronergy CHSM72N-HC-570
3 differences, the largest is module efficiency
Same series, other bin
Astronergy CHSM72N-HC-580 vs Astronergy CHSM72N-HC-565
3 differences, the largest is module efficiency
Same series, other bin
Astronergy CHSM66N(DG)/F-BH-720 vs Astronergy CHSM66N(DG)/F-BH-735
3 differences, the largest is module efficiency
Same series, other bin
Astronergy CHSM66N(DG)/F-BH-720 vs Astronergy CHSM66N(DG)/F-BH-730
3 differences, the largest is module efficiency
Same series, other bin
Astronergy CHSM66N(DG)/F-BH-720 vs Astronergy CHSM66N(DG)/F-BH-725
The same specification on paper
06

Written summary

07

Questions about this pairing

Which panel is better: Astronergy CHSM72N-HC-580 or Astronergy CHSM66N(DG)/F-BH-720?
According to our database: Astronergy CHSM66N(DG)/F-BH-720 has higher module efficiency (23.20% vs 22.50%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Astronergy CHSM72N-HC-580 and Astronergy CHSM66N(DG)/F-BH-720?
Astronergy CHSM72N-HC-580 has a module efficiency of 22.50%, while Astronergy CHSM66N(DG)/F-BH-720 is 23.20%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Astronergy CHSM72N-HC-580 use vs Astronergy CHSM66N(DG)/F-BH-720?
Astronergy CHSM72N-HC-580 uses TOPCon cells; Astronergy CHSM66N(DG)/F-BH-720 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 CHSM72N-HC-580 and Astronergy CHSM66N(DG)/F-BH-720?
Astronergy CHSM72N-HC-580 has a 30 years power warranty; Astronergy CHSM66N(DG)/F-BH-720 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 CHSM72N-HC-580 and Astronergy CHSM66N(DG)/F-BH-720 bifacial panels?
Astronergy CHSM66N(DG)/F-BH-720 is bifacial (captures light from both faces); Astronergy CHSM72N-HC-580 is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

Shop prices: See 40 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.