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ASTRO N5s CHSM54N-HC-435W vs CHSM66N(DG)/F-BH-720 6 of 19 identical Swap Change panels

Astronergy ASTRO N5s CHSM54N-HC-435W vs Astronergy CHSM66N(DG)/F-BH-720

ASTRO N5s CHSM54N-HC-435W
435 Wp 22.30 % 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: 0.90 pp more efficient. 6 of 19 comparable parameters are identical.

See all 13 differences
How alike are they
6 of 19 comparable
parameters are identical
identical differs
01

What actually differs

13 of 19 parameters
Parameter ASTRO N5s CHSM54N-HC-435W CHSM66N(DG)/F-BH-720 Difference
Module efficiency 22.30 % 23.20 % 0.90 pp more efficient
Rated power 435 Wp 720 Wp 285 W more power
Power density 222.8 Wp/m² 231.8 Wp/m² 9.0 Wp/m² higher
Weight 21.3 kg 38.0 kg 16.7 kg lighter
Open-circuit voltage 38.60 V 49.17 V 10.57 V apart
Short-circuit current 14.19 A 18.58 A 4.39 A apart
Module area 1.953 m² 3.106 m² 1.154 m² apart
Weight per kWp 49.0 kg/kWp 52.8 kg/kWp 3.8 kg/kWp lighter
Voltage at max power 32.44 V 40.81 V 8.37 V apart
Current at max power 13.41 A 17.64 A 4.23 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
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.
ASTRO N5s CHSM54N-HC-435W
14,595 kWh
CHSM66N(DG)/F-BH-720
24,157 kWh
Lifetime gap
9,562 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario ASTRO N5s CHSM54N-HC-435W CHSM66N(DG)/F-BH-720
Standard test conditions 25 °C 100.0% of rated power 435 W 720 W
Cool, bright day 40 °C 95.7% of rated power 416 W 689 W
Typical summer roof 55 °C 91.3% of rated power 397 W 657 W
Hot roof 70 °C 87.0% of rated power 378 W 626 W
03

Full specification

Parameter ASTRO N5s CHSM54N-HC-435W CHSM66N(DG)/F-BH-720 Difference
Power and efficiency
Rated power 435 Wp 720 Wp +285 W for CHSM66N(DG)/F-BH-720
Module efficiency 22.30 % 23.20 % +0.90 pp for CHSM66N(DG)/F-BH-720
Power density 222.8 Wp/m² 231.8 Wp/m² +9.0 Wp/m² for CHSM66N(DG)/F-BH-720
Open-circuit voltage 38.60 V 49.17 V 10.57 V apart
Voltage at max power 32.44 V 40.81 V 8.37 V apart
Short-circuit current 14.19 A 18.58 A 4.39 A apart
Current at max power 13.41 A 17.64 A 4.23 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 ASTRO N5s CHSM54N-HC-435W
Weight per kWp 49.0 kg/kWp 52.8 kg/kWp -3.8 kg/kWp for ASTRO N5s CHSM54N-HC-435W
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
04

Against the whole database

14,005 panels
Efficiency
#5,100 vs #1,306
CHSM66N(DG)/F-BH-720 leads by 3,794 places
Power density
#5,150 vs #1,347
CHSM66N(DG)/F-BH-720 leads by 3,803 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#2,656 vs #6,459
ASTRO N5s CHSM54N-HC-435W leads by 3,803 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#9,115 vs #339
CHSM66N(DG)/F-BH-720 leads by 8,776 places
05

More useful comparisons

Open the full database
Same series, other bin
Astronergy ASTRO N5s CHSM54N-HC-435W vs Astronergy CHSM54N-HC-445
4 differences, the largest is module efficiency
Same series, other bin
Astronergy ASTRO N5s CHSM54N-HC-435W vs Astronergy CHSM54N-HC-445W
3 differences, the largest is module efficiency
Same series, other bin
Astronergy ASTRO N5s CHSM54N-HC-435W vs Astronergy ASTRO N5s CHSM54N-HC-445W
3 differences, the largest is module efficiency
Same series, other bin
Astronergy ASTRO N5s CHSM54N-HC-435W vs Astronergy CHSM54N-HC-440
2 differences, the largest is cell technology
Same series, other bin
Astronergy ASTRO N5s CHSM54N-HC-435W vs Astronergy CHSM54N-HC-440W
One difference: module efficiency
Same series, other bin
Astronergy ASTRO N5s CHSM54N-HC-435W vs Astronergy CHSM54N(BL)-HC 440W
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Astronergy ASTRO N5s CHSM54N-HC-435W or Astronergy CHSM66N(DG)/F-BH-720?
According to our database: Astronergy CHSM66N(DG)/F-BH-720 has higher module efficiency (23.20% vs 22.30%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Astronergy ASTRO N5s CHSM54N-HC-435W and Astronergy CHSM66N(DG)/F-BH-720?
Astronergy ASTRO N5s CHSM54N-HC-435 W has a module efficiency of 22.30%, 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 ASTRO N5s CHSM54N-HC-435W use vs Astronergy CHSM66N(DG)/F-BH-720?
Astronergy ASTRO N5s CHSM54N-HC-435 W 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 ASTRO N5s CHSM54N-HC-435W and Astronergy CHSM66N(DG)/F-BH-720?
Astronergy ASTRO N5s CHSM54N-HC-435 W 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 ASTRO N5s CHSM54N-HC-435W and Astronergy CHSM66N(DG)/F-BH-720 bifacial panels?
Astronergy CHSM66N(DG)/F-BH-720 is bifacial (captures light from both faces); Astronergy ASTRO N5s CHSM54N-HC-435 W is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

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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.