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425W vs 435W 16 of 19 identical Swap Change panels

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

Astronergy CHSM54N-HC-425W
CHSM54N-HC-425W
425 Wp 21.80 % TOPCon
Open panel page Datasheet PDF
VS
Astronergy CHSM54N-HC-435W
CHSM54N-HC-435W
435 Wp 22.30 % TOPCon
Open panel page Datasheet PDF
The verdict

435W leads on the differences that matter

The largest is module efficiency: 0.50 pp more efficient. 16 of 19 comparable parameters are identical.

See all 3 differences
How alike are they
16 of 19 comparable
parameters are identical
identical differs
01

What actually differs

3 of 19 parameters
Parameter 425W 435W Difference
Module efficiency 21.80 % 22.30 % 0.50 pp more efficient
Power density 217.6 Wp/m² 222.8 Wp/m² 5.1 Wp/m² higher
Rated power 425 Wp 435 Wp 10 W more power
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.
425W
14,260 kWh
435W
14,595 kWh
Lifetime gap
335 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 425W 435W
Standard test conditions 25 °C 100.0% of rated power 425 W 435 W
Cool, bright day 40 °C 95.7% of rated power 407 W 416 W
Typical summer roof 55 °C 91.3% of rated power 388 W 397 W
Hot roof 70 °C 87.0% of rated power 370 W 378 W
03

Full specification

Parameter 425W 435W Difference
Power and efficiency
Rated power 425 Wp 435 Wp +10 W for 435W
Module efficiency 21.80 % 22.30 % +0.50 pp for 435W
Power density 217.6 Wp/m² 222.8 Wp/m² +5.1 Wp/m² for 435W
Open-circuit voltage 38.20 V 38.60 V Effectively the same
Voltage at max power 32.10 V 32.44 V Effectively the same
Short-circuit current 13.98 A 14.19 A Effectively the same
Current at max power 13.24 A 13.41 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 1722x1134x30 mm 1722x1134x30 mm Same
Module area 1.953 m² 1.953 m² Same
Weight 21.3 kg 21.3 kg Same
Weight per kWp 50.1 kg/kWp 49.0 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 108 108 Same
Bifacial No No Same
04

Against the whole database

14,005 panels
Efficiency
#7,022 vs #5,100
435W leads by 1,922 places
Power density
#7,172 vs #5,150
435W leads by 2,022 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#3,619 vs #2,656
435W leads by 963 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#9,874 vs #9,115
435W leads by 759 places
05

More useful comparisons

Open the full database
Same series, other bin
Astronergy CHSM54N-HC-425W vs Astronergy CHSM54N-HC-445W
4 differences, the largest is module efficiency
Same series, other bin
Astronergy CHSM54N-HC-425W vs Astronergy CHSM54N-HC-440W
3 differences, the largest is module efficiency
Same series, other bin
Astronergy CHSM54N-HC-425W vs Astronergy CHSM54N-HC-430W
One difference: module efficiency
Same manufacturer
Astronergy CHSM54N-HC-425W vs Astronergy CHSM66N(DG)/F-BH-735
12 differences, the largest is module efficiency
Same manufacturer
Astronergy CHSM54N-HC-425W vs Astronergy CHSM66N(DG)/F-BH-730
12 differences, the largest is module efficiency
Same manufacturer
Astronergy CHSM54N-HC-425W vs Astronergy CHSM66N(DG)/F-BH-725
13 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Astronergy CHSM54N-HC-425W or Astronergy CHSM54N-HC-435W?
According to our database: Astronergy CHSM54N-HC-435 W has higher module efficiency (22.30% 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 CHSM54N-HC-435W?
Astronergy CHSM54N-HC-425 W has a module efficiency of 21.80%, while Astronergy CHSM54N-HC-435 W is 22.30%. 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 CHSM54N-HC-435W?
Astronergy CHSM54N-HC-425 W uses TOPCon cells; Astronergy CHSM54N-HC-435 W 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 CHSM54N-HC-435W?
Astronergy CHSM54N-HC-425 W has a 30 years power warranty; Astronergy CHSM54N-HC-435 W 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.

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.