DMEGC DM715G12T-B66HSW vs DMEGC DM705G12T-B66HSW
VS
The verdict
DM715G12T-B66HSW leads on the differences that matter
The largest is module efficiency: 0.30 pp more efficient. 16 of 19 comparable parameters are identical.
See all 3 differencesHow alike are they
16
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
3 of 19 parameters
What actually differs
Parameter
DM715G12T-B66HSW
DM705G12T-B66HSW
Difference
Module efficiency
23.00 %
22.70 %
0.30 pp more efficient
Power density
230.2 Wp/m²
227.0 Wp/m²
3.2 Wp/m² higher
Rated power
715 Wp
705 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.
DM715G12T-B66HSW
23,990 kWh
DM705G12T-B66HSW
23,654 kWh
Lifetime gap
336 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
DM715G12T-B66HSW
DM705G12T-B66HSW
Standard test conditions
25 °C
100.0% of rated power
715 W
705 W
Cool, bright day
40 °C
95.7% of rated power
684 W
674 W
Typical summer roof
55 °C
91.3% of rated power
653 W
644 W
Hot roof
70 °C
87.0% of rated power
622 W
613 W
03
Full specification
Parameter
DM715G12T-B66HSW
DM705G12T-B66HSW
Difference
Power and efficiency
Rated power
715 Wp
705 Wp
+10 W for DM715G12T-B66HSW
Module efficiency
23.00 %
22.70 %
+0.30 pp for DM715G12T-B66HSW
Power density
230.2 Wp/m²
227.0 Wp/m²
+3.2 Wp/m² for DM715G12T-B66HSW
Open-circuit voltage
49.02 V
48.62 V
Effectively the same
Voltage at max power
40.93 V
40.58 V
Effectively the same
Short-circuit current
18.56 A
18.48 A
Effectively the same
Current at max power
17.50 A
17.40 A
Effectively the same
Temperature
Temperature coefficient
-0.290 %/°C
-0.290 %/°C
Same
Mechanical
Dimensions
2384x1303x33 mm
2384x1303x33 mm
Same
Module area
3.106 m²
3.106 m²
Same
Weight
37.7 kg
37.7 kg
Same
Weight per kWp
52.7 kg/kWp
53.5 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
132
132
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#1,919
vs
#3,307
DM715G12T-B66HSW leads by 1,388 places
Power density
#2,018
vs
#3,361
DM715G12T-B66HSW leads by 1,343 places
Heat behaviour
#2,165
vs
#2,165
Tied - the same position in the database
Weight
#6,393
vs
#7,434
DM715G12T-B66HSW leads by 1,041 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#450
vs
#747
DM715G12T-B66HSW leads by 297 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 DM715G12T-B66HSW or DMEGC DM705G12T-B66HSW?
According to our database: DMEGC DM715G12T-B66HSW has higher module efficiency (23.00% vs 22.70%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of DMEGC DM715G12T-B66HSW and DMEGC DM705G12T-B66HSW?
DMEGC DM715G12T-B66HSW has a module efficiency of 23.00%, while DMEGC DM705G12T-B66HSW is 22.70%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does DMEGC DM715G12T-B66HSW use vs DMEGC DM705G12T-B66HSW?
DMEGC DM715G12T-B66HSW uses TOPCon cells; DMEGC DM705G12T-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 DM715G12T-B66HSW and DMEGC DM705G12T-B66HSW?
DMEGC DM715G12T-B66HSW has a 30 years power warranty; DMEGC DM705G12T-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 DM715G12T-B66HSW and DMEGC DM705G12T-B66HSW bifacial panels?
Both DMEGC DM715G12T-B66HSW and DMEGC DM705G12T-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.
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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.