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690 vs 720 13 of 19 identical Swap Change panels

Resun Solar RS9H-M-DG-690 vs Resun Solar RS9H-M-DG-720

Resun Solar RS9H-M-DG-690
Resun Solar
RS9H-M-DG-690
690 Wp 22.21 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Resun Solar RS9H-M-DG-720
Resun Solar
RS9H-M-DG-720
720 Wp 23.18 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

720 leads on the differences that matter

The largest is module efficiency: 0.97 pp more efficient. 13 of 19 comparable parameters are identical.

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

What actually differs

6 of 19 parameters
Parameter 690 720 Difference
Module efficiency 22.21 % 23.18 % 0.97 pp more efficient
Power density 222.1 Wp/m² 231.8 Wp/m² 9.7 Wp/m² higher
Rated power 690 Wp 720 Wp 30 W more power
Weight per kWp 55.8 kg/kWp 53.5 kg/kWp 2.3 kg/kWp lighter
Open-circuit voltage 48.10 V 49.40 V 1.30 V apart
Voltage at max power 40.10 V 41.30 V 1.20 V apart
02

What it means on a roof

Thirty years of production
Declared annual degradation, with a 1.0% first-year loss assumed for both panels because at least one datasheet omits it, at 1,200 kWh/kWp a year
Same temp coeff. for both panels (-0.300 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
690
22,791 kWh
720
23,782 kWh
Lifetime gap
991 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 690 720
Standard test conditions 25 °C 100.0% of rated power 690 W 720 W
Cool, bright day 40 °C 95.5% of rated power 659 W 688 W
Typical summer roof 55 °C 91.0% of rated power 628 W 655 W
Hot roof 70 °C 86.5% of rated power 597 W 623 W
03

Full specification

Parameter 690 720 Difference
Power and efficiency
Rated power 690 Wp 720 Wp +30 W for 720
Module efficiency 22.21 % 23.18 % +0.97 pp for 720
Power density 222.1 Wp/m² 231.8 Wp/m² +9.7 Wp/m² for 720
Open-circuit voltage 48.10 V 49.40 V 1.30 V apart
Voltage at max power 40.10 V 41.30 V 1.20 V apart
Short-circuit current 18.24 A 18.49 A Effectively the same
Current at max power 17.21 A 17.44 A Effectively the same
Temperature
Temperature coefficient -0.300 %/°C -0.300 %/°C Same
Mechanical
Dimensions 2384x1303x35 mm 2384x1303x35 mm Same
Module area 3.106 m² 3.106 m² Same
Weight 38.5 kg 38.5 kg Same
Weight per kWp 55.8 kg/kWp 53.5 kg/kWp -2.3 kg/kWp for 720
Warranty and degradation
Product warranty 15 yrs 15 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.50 %/yr 0.50 %/yr Same
Technology
Cell technology TOPCon TOPCon Same
Cell type Monocrystalline Monocrystalline Same
Cell count 132 132 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#5,754 vs #1,424
720 leads by 4,330 places
Power density
#5,734 vs #1,347
720 leads by 4,387 places
Heat behaviour
#6,093 vs #6,093
Tied - the same position in the database
Weight
#10,180 vs #7,424
720 leads by 2,756 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#1,286 vs #362
720 leads by 924 places
05

More useful comparisons

Open the full database
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Resun Solar RS9H-M-DG-690 vs Resun Solar RS9H-M-DG-695
The same specification on paper
06

Written summary

07

Questions about this pairing

Which panel is better: Resun Solar RS9H-M-DG-690 or Resun Solar RS9H-M-DG-720?
According to our database: Resun Solar RS9H-M-DG-720 has higher module efficiency (23.18% vs 22.21%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Resun Solar RS9H-M-DG-690 and Resun Solar RS9H-M-DG-720?
Resun Solar RS9H-M-DG-690 has a module efficiency of 22.21%, while Resun Solar RS9H-M-DG-720 is 23.18%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Resun Solar RS9H-M-DG-690 use vs Resun Solar RS9H-M-DG-720?
Resun Solar RS9H-M-DG-690 uses TOPCon cells; Resun Solar RS9H-M-DG-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 Resun Solar RS9H-M-DG-690 and Resun Solar RS9H-M-DG-720?
Resun Solar RS9H-M-DG-690 has a 30 years power warranty; Resun Solar RS9H-M-DG-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 Resun Solar RS9H-M-DG-690 and Resun Solar RS9H-M-DG-720 bifacial panels?
Both Resun Solar RS9H-M-DG-690 and Resun Solar RS9H-M-DG-720 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.

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.