Vikram Solar HYPERSOL VSMDH.66.640.05 vs Vikram Solar HYPERSOL VSMDH.66.725.05
VS
The verdict
640.05 leads on the differences that matter
The largest is rated power: 85 W more power. 11 of 19 comparable parameters are identical.
See all 8 differencesHow alike are they
11
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
8 of 19 parameters
What actually differs
Parameter
640.05
725.05
Difference
Rated power
640 Wp
725 Wp
85 W more power
Weight
33.4 kg
37.5 kg
4.1 kg lighter
Module efficiency
23.69 %
23.34 %
0.35 pp more efficient
Short-circuit current
16.16 A
18.56 A
2.40 A apart
Module area
2.701 m²
3.106 m²
0.405 m² apart
Power density
236.9 Wp/m²
233.4 Wp/m²
3.5 Wp/m² higher
Current at max power
15.25 A
17.52 A
2.27 A apart
Dimensions
2382x1134x30 mm
2384x1303x33 mm
2382x1134x30 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 (-0.280 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
640.05
21,473 kWh
725.05
24,325 kWh
Lifetime gap
2,852 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
640.05
725.05
Standard test conditions
25 °C
100.0% of rated power
640 W
725 W
Cool, bright day
40 °C
95.8% of rated power
613 W
695 W
Typical summer roof
55 °C
91.6% of rated power
586 W
664 W
Hot roof
70 °C
87.4% of rated power
559 W
634 W
03
Full specification
Parameter
640.05
725.05
Difference
Power and efficiency
Rated power
640 Wp
725 Wp
+85 W for 725.05
Module efficiency
23.69 %
23.34 %
+0.35 pp for 640.05
Power density
236.9 Wp/m²
233.4 Wp/m²
+3.5 Wp/m² for 640.05
Open-circuit voltage
49.90 V
49.60 V
Effectively the same
Voltage at max power
42.00 V
41.40 V
Effectively the same
Short-circuit current
16.16 A
18.56 A
2.40 A apart
Current at max power
15.25 A
17.52 A
2.27 A apart
Temperature
Temperature coefficient
-0.280 %/°C
-0.280 %/°C
Same
Mechanical
Dimensions
2382x1134x30 mm
2384x1303x33 mm
2382x1134x30 mm vs 2384x1303x33 mm
Module area
2.701 m²
3.106 m²
0.405 m² apart
Weight
33.4 kg
37.5 kg
-4.1 kg for 640.05
Weight per kWp
52.2 kg/kWp
51.7 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
12 yrs
12 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.40 %/yr
0.40 %/yr
Same
Technology
Cell technology
N-type
N-type
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
132
132
Same
Bifacial
Yes
Yes
Same
04
14,129 panels
Against the whole database
Efficiency
#612
vs
#981
640.05 leads by 369 places
Power density
#553
vs
#974
640.05 leads by 421 places
Heat behaviour
#1,347
vs
#1,347
Tied - the same position in the database
Weight
#5,707
vs
#5,114
725.05 leads by 593 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#1,555
vs
#402
725.05 leads by 1,153 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: Vikram Solar HYPERSOL VSMDH.66.640.05 or Vikram Solar HYPERSOL VSMDH.66.725.05?
According to our database: Vikram Solar HYPERSOL VSMDH.66.640.05 has higher module efficiency (23.69% vs 23.34%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Vikram Solar HYPERSOL VSMDH.66.640.05 and Vikram Solar HYPERSOL VSMDH.66.725.05?
Vikram Solar HYPERSOL VSMDH.66.640.05 has a module efficiency of 23.69%, while Vikram Solar HYPERSOL VSMDH.66.725.05 is 23.34%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Vikram Solar HYPERSOL VSMDH.66.640.05 use vs Vikram Solar HYPERSOL VSMDH.66.725.05?
Vikram Solar HYPERSOL VSMDH.66.640.05 uses N-type cells; Vikram Solar HYPERSOL VSMDH.66.725.05 uses N-type. 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 Vikram Solar HYPERSOL VSMDH.66.640.05 and Vikram Solar HYPERSOL VSMDH.66.725.05?
Vikram Solar HYPERSOL VSMDH.66.640.05 has a 30 years power warranty; Vikram Solar HYPERSOL VSMDH.66.725.05 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 Vikram Solar HYPERSOL VSMDH.66.640.05 and Vikram Solar HYPERSOL VSMDH.66.725.05 bifacial panels?
Both Vikram Solar HYPERSOL VSMDH.66.640.05 and Vikram Solar HYPERSOL VSMDH.66.725.05 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.