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CHSM66RN(DG)/F-BQ-645 vs CHSM66N(DG)/F-BH-735 8 of 19 identical Swap Change panels

Astronergy CHSM66RN(DG)/F-BQ-645 vs Astronergy CHSM66N(DG)/F-BH-735

Astronergy CHSM66RN(DG)/F-BQ-645
CHSM66RN(DG)/F-BQ-645
645 Wp 23.90 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Astronergy CHSM66N(DG)/F-BH-735
CHSM66N(DG)/F-BH-735
735 Wp 23.70 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

CHSM66RN(DG)/F-BQ-645 leads on the differences that matter

The largest is rated power: 90 W more power. 8 of 19 comparable parameters are identical.

See all 11 differences
How alike are they
8 of 19 comparable
parameters are identical
identical differs
01

What actually differs

11 of 19 parameters
Parameter CHSM66RN(DG)/F-BQ-645 CHSM66N(DG)/F-BH-735 Difference
Rated power 645 Wp 735 Wp 90 W more power
Temperature coefficient -0.260 %/°C -0.290 %/°C 0.030 %/°C better in heat
Weight 32.0 kg 38.0 kg 6.0 kg lighter
Short-circuit current 16.50 A 18.72 A 2.22 A apart
Module area 2.701 m² 3.106 m² 0.405 m² apart
Module efficiency 23.90 % 23.70 % 0.20 pp more efficient
Annual degradation 0.35 %/yr 0.40 %/yr 0.05 %/yr slower
Current at max power 15.73 A 17.75 A 2.02 A apart
Cell count 264 132 132 cells apart
Weight per kWp 49.6 kg/kWp 51.7 kg/kWp 2.1 kg/kWp lighter
Dimensions 2382x1134x30 mm 2384x1303x33 mm 2382x1134x30 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
CHSM66RN(DG)/F-BQ-645
21,809 kWh
CHSM66N(DG)/F-BH-735
24,661 kWh
Lifetime gap
2,852 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario CHSM66RN(DG)/F-BQ-645 CHSM66N(DG)/F-BH-735
Standard test conditions 25 °C 100.0% of rated power 645 W 735 W
Cool, bright day 40 °C 95.7% of rated power 620 W 703 W
Typical summer roof 55 °C 91.3% of rated power 595 W 671 W
Hot roof 70 °C 87.0% of rated power 570 W 639 W
03

Full specification

Parameter CHSM66RN(DG)/F-BQ-645 CHSM66N(DG)/F-BH-735 Difference
Power and efficiency
Rated power 645 Wp 735 Wp +90 W for CHSM66N(DG)/F-BH-735
Module efficiency 23.90 % 23.70 % +0.20 pp for CHSM66RN(DG)/F-BQ-645
Power density 238.8 Wp/m² 236.6 Wp/m² Effectively the same
Open-circuit voltage 48.83 V 49.77 V Effectively the same
Voltage at max power 41.02 V 41.41 V Effectively the same
Short-circuit current 16.50 A 18.72 A 2.22 A apart
Current at max power 15.73 A 17.75 A 2.02 A apart
Temperature
Temperature coefficient -0.260 %/°C -0.290 %/°C +0.030 %/°C for CHSM66RN(DG)/F-BQ-645
Mechanical
Dimensions 2382x1134x30 mm 2384x1303x33 mm 2382x1134x30 mm vs 2384x1303x33 mm
Module area 2.701 m² 3.106 m² 0.405 m² apart
Weight 32.0 kg 38.0 kg -6.0 kg for CHSM66RN(DG)/F-BQ-645
Weight per kWp 49.6 kg/kWp 51.7 kg/kWp -2.1 kg/kWp for CHSM66RN(DG)/F-BQ-645
Warranty and degradation
Product warranty 15 yrs 15 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.35 %/yr 0.40 %/yr -0.05 %/yr for CHSM66RN(DG)/F-BQ-645
Technology
Cell technology TOPCon TOPCon Same
Cell type Monocrystalline Monocrystalline Same
Cell count 264 132 132 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#351 vs #517
CHSM66RN(DG)/F-BQ-645 leads by 166 places
Power density
#356 vs #582
CHSM66RN(DG)/F-BQ-645 leads by 226 places
Heat behaviour
#511 vs #2,165
CHSM66RN(DG)/F-BQ-645 leads by 1,654 places
Weight
#3,158 vs #5,081
CHSM66RN(DG)/F-BQ-645 leads by 1,923 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#1,068 vs #160
CHSM66N(DG)/F-BH-735 leads by 908 places
05

More useful comparisons

Open the full database
Same series, other bin
Astronergy CHSM66RN(DG)/F-BQ-645 vs Astronergy CHSM66RN(DG)/F-BQ-670
3 differences, the largest is module efficiency
Same series, other bin
Astronergy CHSM66RN(DG)/F-BQ-645 vs Astronergy CHSM66RN(DG)/F-BQ
3 differences, the largest is module efficiency
Same series, other bin
Astronergy CHSM66RN(DG)/F-BQ-645 vs Astronergy CHSM66RN(DG)/F-BQ-665
3 differences, the largest is module efficiency
Same series, other bin
Astronergy CHSM66RN(DG)/F-BQ-645 vs Astronergy CHSM66RN(DG)/F-BQ-660
3 differences, the largest is module efficiency
Same series, other bin
Astronergy CHSM66RN(DG)/F-BQ-645 vs Astronergy CHSM66RN(DG)/F-BQ-655
3 differences, the largest is module efficiency
Same series, other bin
Astronergy CHSM66RN(DG)/F-BQ-645 vs Astronergy CHSM66RN(DG)/F-BQ-650
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Astronergy CHSM66RN(DG)/F-BQ-645 or Astronergy CHSM66N(DG)/F-BH-735?
According to our database: Astronergy CHSM66RN(DG)/F-BQ-645 has higher module efficiency (23.90% vs 23.70%); Astronergy CHSM66RN(DG)/F-BQ-645 tolerates heat better (temp coeff -0.260%/°C vs -0.290%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Astronergy CHSM66RN(DG)/F-BQ-645 and Astronergy CHSM66N(DG)/F-BH-735?
Astronergy CHSM66RN(DG)/F-BQ-645 has a module efficiency of 23.90%, while Astronergy CHSM66N(DG)/F-BH-735 is 23.70%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Astronergy CHSM66RN(DG)/F-BQ-645 use vs Astronergy CHSM66N(DG)/F-BH-735?
Astronergy CHSM66RN(DG)/F-BQ-645 uses TOPCon cells; Astronergy CHSM66N(DG)/F-BH-735 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 CHSM66RN(DG)/F-BQ-645 and Astronergy CHSM66N(DG)/F-BH-735?
Astronergy CHSM66RN(DG)/F-BQ-645 has a 30 years power warranty; Astronergy CHSM66N(DG)/F-BH-735 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 CHSM66RN(DG)/F-BQ-645 and Astronergy CHSM66N(DG)/F-BH-735 bifacial panels?
Both Astronergy CHSM66RN(DG)/F-BQ-645 and Astronergy CHSM66N(DG)/F-BH-735 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.

Shop prices: See 37 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.