DMEGC DM645M10T-B78HSW vs DMEGC DM695G12T-B66HSW
VS
The verdict
DM645M10T-B78HSW leads on the differences that matter
The largest is module efficiency: 0.70 pp more efficient. 7 of 19 comparable parameters are identical.
See all 12 differencesHow alike are they
7
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
12 of 19 parameters
What actually differs
Parameter
DM645M10T-B78HSW
DM695G12T-B66HSW
Difference
Module efficiency
23.10 %
22.40 %
0.70 pp more efficient
Rated power
645 Wp
695 Wp
50 W more power
Weight
33.5 kg
37.7 kg
4.2 kg lighter
Power density
230.7 Wp/m²
223.7 Wp/m²
7.0 Wp/m² higher
Open-circuit voltage
57.90 V
48.22 V
9.68 V apart
Short-circuit current
14.19 A
18.38 A
4.19 A apart
Module area
2.795 m²
3.106 m²
0.311 m² apart
Voltage at max power
48.05 V
40.20 V
7.85 V apart
Current at max power
13.44 A
17.30 A
3.86 A apart
Cell count
156
132
24 cells apart
Weight per kWp
51.9 kg/kWp
54.2 kg/kWp
2.3 kg/kWp lighter
Dimensions
2465x1134x30 mm
2384x1303x33 mm
2465x1134x30 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.
DM645M10T-B78HSW
21,641 kWh
DM695G12T-B66HSW
23,319 kWh
Lifetime gap
1,678 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
DM645M10T-B78HSW
DM695G12T-B66HSW
Standard test conditions
25 °C
100.0% of rated power
645 W
695 W
Cool, bright day
40 °C
95.7% of rated power
617 W
665 W
Typical summer roof
55 °C
91.3% of rated power
589 W
635 W
Hot roof
70 °C
87.0% of rated power
561 W
604 W
03
Full specification
Parameter
DM645M10T-B78HSW
DM695G12T-B66HSW
Difference
Power and efficiency
Rated power
645 Wp
695 Wp
+50 W for DM695G12T-B66HSW
Module efficiency
23.10 %
22.40 %
+0.70 pp for DM645M10T-B78HSW
Power density
230.7 Wp/m²
223.7 Wp/m²
+7.0 Wp/m² for DM645M10T-B78HSW
Open-circuit voltage
57.90 V
48.22 V
9.68 V apart
Voltage at max power
48.05 V
40.20 V
7.85 V apart
Short-circuit current
14.19 A
18.38 A
4.19 A apart
Current at max power
13.44 A
17.30 A
3.86 A apart
Temperature
Temperature coefficient
-0.290 %/°C
-0.290 %/°C
Same
Mechanical
Dimensions
2465x1134x30 mm
2384x1303x33 mm
2465x1134x30 mm vs 2384x1303x33 mm
Module area
2.795 m²
3.106 m²
0.311 m² apart
Weight
33.5 kg
37.7 kg
-4.2 kg for DM645M10T-B78HSW
Weight per kWp
51.9 kg/kWp
54.2 kg/kWp
-2.3 kg/kWp for DM645M10T-B78HSW
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
132
24 cells apart
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#1,570
vs
#4,774
DM645M10T-B78HSW leads by 3,204 places
Power density
#1,654
vs
#4,877
DM645M10T-B78HSW leads by 3,223 places
Heat behaviour
#2,165
vs
#2,165
Tied - the same position in the database
Weight
#5,361
vs
#8,493
DM645M10T-B78HSW leads by 3,132 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#1,491
vs
#1,084
DM695G12T-B66HSW leads by 407 places
05
Open the full database
More useful comparisons
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DMEGC DM645M10T-B78HSW vs DMEGC DM595M10T-B72HSW
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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 DM695G12T-B66HSW?
According to our database: DMEGC DM645M10T-B78HSW has higher module efficiency (23.10% vs 22.40%). 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 DM695G12T-B66HSW?
DMEGC DM645M10T-B78HSW has a module efficiency of 23.10%, while DMEGC DM695G12T-B66HSW is 22.40%. 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 DM695G12T-B66HSW?
DMEGC DM645M10T-B78HSW uses TOPCon cells; DMEGC DM695G12T-B66HSW 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 DM695G12T-B66HSW?
DMEGC DM645M10T-B78HSW has a 30 years power warranty; DMEGC DM695G12T-B66HSW 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 DM695G12T-B66HSW bifacial panels?
Both DMEGC DM645M10T-B78HSW and DMEGC DM695G12T-B66HSW 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 82 DMEGC 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.