Vikram Solar HYPERSOL VSMDH.66.710.05 vs Vikram Solar HYPERSOL VSMDH.66.640.05
VS
The verdict
640.05 leads on the differences that matter
The largest is module efficiency: 0.83 pp more efficient. 10 of 19 comparable parameters are identical.
See all 9 differencesHow alike are they
10
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
9 of 19 parameters
What actually differs
Parameter
710.05
640.05
Difference
Module efficiency
22.86 %
23.69 %
0.83 pp more efficient
Rated power
710 Wp
640 Wp
70 W more power
Weight
37.5 kg
33.4 kg
4.1 kg lighter
Power density
228.6 Wp/m²
236.9 Wp/m²
8.4 Wp/m² higher
Short-circuit current
18.44 A
16.16 A
2.28 A apart
Module area
3.106 m²
2.701 m²
0.405 m² apart
Current at max power
17.41 A
15.25 A
2.16 A apart
Dimensions
2384x1303x33 mm
2382x1134x30 mm
2384x1303x33 mm vs 2382x1134x30 mm
Voltage at max power
40.80 V
42.00 V
1.20 V apart
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.
710.05
23,822 kWh
640.05
21,473 kWh
Lifetime gap
2,349 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
710.05
640.05
Standard test conditions
25 °C
100.0% of rated power
710 W
640 W
Cool, bright day
40 °C
95.8% of rated power
680 W
613 W
Typical summer roof
55 °C
91.6% of rated power
650 W
586 W
Hot roof
70 °C
87.4% of rated power
621 W
559 W
03
Full specification
Parameter
710.05
640.05
Difference
Power and efficiency
Rated power
710 Wp
640 Wp
+70 W for 710.05
Module efficiency
22.86 %
23.69 %
+0.83 pp for 640.05
Power density
228.6 Wp/m²
236.9 Wp/m²
+8.4 Wp/m² for 640.05
Open-circuit voltage
49.00 V
49.90 V
Effectively the same
Voltage at max power
40.80 V
42.00 V
1.20 V apart
Short-circuit current
18.44 A
16.16 A
2.28 A apart
Current at max power
17.41 A
15.25 A
2.16 A apart
Temperature
Temperature coefficient
-0.280 %/°C
-0.280 %/°C
Same
Mechanical
Dimensions
2384x1303x33 mm
2382x1134x30 mm
2384x1303x33 mm vs 2382x1134x30 mm
Module area
3.106 m²
2.701 m²
0.405 m² apart
Weight
37.5 kg
33.4 kg
-4.1 kg for 640.05
Weight per kWp
52.8 kg/kWp
52.2 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
#2,591
vs
#612
640.05 leads by 1,979 places
Power density
#2,529
vs
#553
640.05 leads by 1,976 places
Heat behaviour
#1,347
vs
#1,347
Tied - the same position in the database
Weight
#6,552
vs
#5,707
640.05 leads by 845 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#862
vs
#1,555
710.05 leads by 693 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.66.710.05 or Vikram Solar HYPERSOL VSMDH.66.640.05?
According to our database: Vikram Solar HYPERSOL VSMDH.66.640.05 has higher module efficiency (23.69% vs 22.86%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Vikram Solar HYPERSOL VSMDH.66.710.05 and Vikram Solar HYPERSOL VSMDH.66.640.05?
Vikram Solar HYPERSOL VSMDH.66.710.05 has a module efficiency of 22.86%, while Vikram Solar HYPERSOL VSMDH.66.640.05 is 23.69%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Vikram Solar HYPERSOL VSMDH.66.710.05 use vs Vikram Solar HYPERSOL VSMDH.66.640.05?
Vikram Solar HYPERSOL VSMDH.66.710.05 uses N-type cells; Vikram Solar HYPERSOL VSMDH.66.640.05 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.66.710.05 and Vikram Solar HYPERSOL VSMDH.66.640.05?
Vikram Solar HYPERSOL VSMDH.66.710.05 has a 30 years power warranty; Vikram Solar HYPERSOL VSMDH.66.640.05 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.66.710.05 and Vikram Solar HYPERSOL VSMDH.66.640.05 bifacial panels?
Both Vikram Solar HYPERSOL VSMDH.66.710.05 and Vikram Solar HYPERSOL VSMDH.66.640.05 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.