DMEGC DM635G12RT-B66HSW vs DMEGC DM625G12RT-B66HSW
VS
The verdict
DM635G12RT-B66HSW leads on the differences that matter
The largest is module efficiency: 0.40 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
DM635G12RT-B66HSW
DM625G12RT-B66HSW
Difference
Module efficiency
23.50 %
23.10 %
0.40 pp more efficient
Power density
235.1 Wp/m²
231.4 Wp/m²
3.7 Wp/m² higher
Rated power
635 Wp
625 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.
DM635G12RT-B66HSW
21,306 kWh
DM625G12RT-B66HSW
20,970 kWh
Lifetime gap
336 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
DM635G12RT-B66HSW
DM625G12RT-B66HSW
Standard test conditions
25 °C
100.0% of rated power
635 W
625 W
Cool, bright day
40 °C
95.7% of rated power
607 W
598 W
Typical summer roof
55 °C
91.3% of rated power
580 W
571 W
Hot roof
70 °C
87.0% of rated power
552 W
543 W
03
Full specification
Parameter
DM635G12RT-B66HSW
DM625G12RT-B66HSW
Difference
Power and efficiency
Rated power
635 Wp
625 Wp
+10 W for DM635G12RT-B66HSW
Module efficiency
23.50 %
23.10 %
+0.40 pp for DM635G12RT-B66HSW
Power density
235.1 Wp/m²
231.4 Wp/m²
+3.7 Wp/m² for DM635G12RT-B66HSW
Open-circuit voltage
49.69 V
49.29 V
Effectively the same
Voltage at max power
41.45 V
41.05 V
Effectively the same
Short-circuit current
16.29 A
16.17 A
Effectively the same
Current at max power
15.35 A
15.25 A
Effectively the same
Temperature
Temperature coefficient
-0.290 %/°C
-0.290 %/°C
Same
Mechanical
Dimensions
2382x1134x30 mm
2382x1134x30 mm
Same
Module area
2.701 m²
2.701 m²
Same
Weight
32.3 kg
32.3 kg
Same
Weight per kWp
50.9 kg/kWp
51.7 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
#716
vs
#1,570
DM635G12RT-B66HSW leads by 854 places
Power density
#741
vs
#1,513
DM635G12RT-B66HSW leads by 772 places
Heat behaviour
#2,165
vs
#2,165
Tied - the same position in the database
Weight
#4,252
vs
#5,050
DM635G12RT-B66HSW leads by 798 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#1,437
vs
#1,863
DM635G12RT-B66HSW leads by 426 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 DM635G12RT-B66HSW or DMEGC DM625G12RT-B66HSW?
According to our database: DMEGC DM635G12RT-B66HSW has higher module efficiency (23.50% vs 23.10%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of DMEGC DM635G12RT-B66HSW and DMEGC DM625G12RT-B66HSW?
DMEGC DM635G12RT-B66HSW has a module efficiency of 23.50%, while DMEGC DM625G12RT-B66HSW is 23.10%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does DMEGC DM635G12RT-B66HSW use vs DMEGC DM625G12RT-B66HSW?
DMEGC DM635G12RT-B66HSW uses TOPCon cells; DMEGC DM625G12RT-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 DM635G12RT-B66HSW and DMEGC DM625G12RT-B66HSW?
DMEGC DM635G12RT-B66HSW has a 30 years power warranty; DMEGC DM625G12RT-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 DM635G12RT-B66HSW and DMEGC DM625G12RT-B66HSW bifacial panels?
Both DMEGC DM635G12RT-B66HSW and DMEGC DM625G12RT-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 83 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.