DMEGC DM645M10T-B78HSW vs DMEGC DM595M10T-B72HSW
VS
The verdict
DM645M10T-B78HSW leads on the differences that matter
The largest is rated power: 50 W more power. 12 of 19 comparable parameters are identical.
See all 7 differencesHow alike are they
12
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
7 of 19 parameters
What actually differs
Parameter
DM645M10T-B78HSW
DM595M10T-B72HSW
Difference
Rated power
645 Wp
595 Wp
50 W more power
Open-circuit voltage
57.90 V
53.10 V
4.80 V apart
Module area
2.795 m²
2.583 m²
0.212 m² apart
Weight
33.5 kg
31.8 kg
1.7 kg lighter
Cell count
156
144
12 cells apart
Voltage at max power
48.05 V
44.42 V
3.63 V apart
Dimensions
2465x1134x30 mm
2278x1134x30 mm
2465x1134x30 mm vs 2278x1134x30 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.
DM645M10T-B78HSW
21,641 kWh
DM595M10T-B72HSW
19,963 kWh
Lifetime gap
1,678 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
DM645M10T-B78HSW
DM595M10T-B72HSW
Standard test conditions
25 °C
100.0% of rated power
645 W
595 W
Cool, bright day
40 °C
95.7% of rated power
617 W
569 W
Typical summer roof
55 °C
91.3% of rated power
589 W
543 W
Hot roof
70 °C
87.0% of rated power
561 W
517 W
03
Full specification
Parameter
DM645M10T-B78HSW
DM595M10T-B72HSW
Difference
Power and efficiency
Rated power
645 Wp
595 Wp
+50 W for DM645M10T-B78HSW
Module efficiency
23.10 %
23.00 %
Effectively the same
Power density
230.7 Wp/m²
230.3 Wp/m²
Effectively the same
Open-circuit voltage
57.90 V
53.10 V
4.80 V apart
Voltage at max power
48.05 V
44.42 V
3.63 V apart
Short-circuit current
14.19 A
14.17 A
Effectively the same
Current at max power
13.44 A
13.42 A
Effectively the same
Temperature
Temperature coefficient
-0.290 %/°C
-0.290 %/°C
Same
Mechanical
Dimensions
2465x1134x30 mm
2278x1134x30 mm
2465x1134x30 mm vs 2278x1134x30 mm
Module area
2.795 m²
2.583 m²
0.212 m² apart
Weight
33.5 kg
31.8 kg
-1.7 kg for DM595M10T-B72HSW
Weight per kWp
51.9 kg/kWp
53.4 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
156
144
12 cells apart
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#1,570
vs
#1,919
DM645M10T-B78HSW leads by 349 places
Power density
#1,654
vs
#1,758
DM645M10T-B78HSW leads by 104 places
Heat behaviour
#2,165
vs
#2,165
Tied - the same position in the database
Weight
#5,361
vs
#7,376
DM645M10T-B78HSW leads by 2,015 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#1,491
vs
#2,769
DM645M10T-B78HSW leads by 1,278 places
05
Open the full database
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06
Written summary
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07
Questions about this pairing
Which panel is better: DMEGC DM645M10T-B78HSW or DMEGC DM595M10T-B72HSW?
According to our database: DMEGC DM645M10T-B78HSW has higher module efficiency (23.10% vs 23.00%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of DMEGC DM645M10T-B78HSW and DMEGC DM595M10T-B72HSW?
DMEGC DM645M10T-B78HSW has a module efficiency of 23.10%, while DMEGC DM595M10T-B72HSW is 23.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does DMEGC DM645M10T-B78HSW use vs DMEGC DM595M10T-B72HSW?
DMEGC DM645M10T-B78HSW uses TOPCon cells; DMEGC DM595M10T-B72HSW 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 DMEGC DM645M10T-B78HSW and DMEGC DM595M10T-B72HSW?
DMEGC DM645M10T-B78HSW has a 30 years power warranty; DMEGC DM595M10T-B72HSW 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 DMEGC DM645M10T-B78HSW and DMEGC DM595M10T-B72HSW bifacial panels?
Both DMEGC DM645M10T-B78HSW and DMEGC DM595M10T-B72HSW 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.
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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.