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660 vs 680 16 of 19 identical Swap Change panels

Vikram Solar PARADEA VSMDH.66.AAA.05-660 vs Vikram Solar PARADEA VSMDH.66.AAA.05-680

Vikram Solar PARADEA VSMDH.66.AAA.05-660
Vikram Solar
PARADEA VSMDH.66.AAA.05-660
660 Wp 21.25 % PERC Bifacial
Open panel page Datasheet PDF
VS
Vikram Solar PARADEA VSMDH.66.AAA.05-680
Vikram Solar
PARADEA VSMDH.66.AAA.05-680
680 Wp 21.89 % PERC Bifacial
Open panel page Datasheet PDF
The verdict

680 leads on the differences that matter

The largest is module efficiency: 0.64 pp more efficient. 16 of 19 comparable parameters are identical.

See all 3 differences
How alike are they
16 of 19 comparable
parameters are identical
identical differs
01

What actually differs

3 of 19 parameters
Parameter 660 680 Difference
Module efficiency 21.25 % 21.89 % 0.64 pp more efficient
Power density 212.5 Wp/m² 218.9 Wp/m² 6.4 Wp/m² higher
Rated power 660 Wp 680 Wp 20 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 (-0.350 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
660
21,562 kWh
680
22,216 kWh
Lifetime gap
654 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 660 680
Standard test conditions 25 °C 100.0% of rated power 660 W 680 W
Cool, bright day 40 °C 94.8% of rated power 625 W 644 W
Typical summer roof 55 °C 89.5% of rated power 591 W 609 W
Hot roof 70 °C 84.2% of rated power 556 W 573 W
03

Full specification

Parameter 660 680 Difference
Power and efficiency
Rated power 660 Wp 680 Wp +20 W for 680
Module efficiency 21.25 % 21.89 % +0.64 pp for 680
Power density 212.5 Wp/m² 218.9 Wp/m² +6.4 Wp/m² for 680
Open-circuit voltage 46.10 V 46.90 V Effectively the same
Voltage at max power 38.50 V 39.30 V Effectively the same
Short-circuit current 17.99 A 18.23 A Effectively the same
Current at max power 17.16 A 17.31 A Effectively the same
Temperature
Temperature coefficient -0.350 %/°C -0.350 %/°C Same
Mechanical
Dimensions 2384x1303x35 mm 2384x1303x35 mm Same
Module area 3.106 m² 3.106 m² Same
Weight 39.5 kg 39.5 kg Same
Weight per kWp 59.8 kg/kWp 58.1 kg/kWp Effectively the same
Warranty and degradation
Product warranty 12 yrs 12 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.50 %/yr 0.50 %/yr Same
Technology
Cell technology PERC PERC Same
Cell type Monocrystalline Monocrystalline Same
Cell count 132 132 Same
Bifacial Yes Yes Same
04

Against the whole database

14,129 panels
Efficiency
#8,973 vs #6,946
680 leads by 2,027 places
Power density
#9,028 vs #6,868
680 leads by 2,160 places
Heat behaviour
#10,489 vs #10,489
Tied - the same position in the database
Weight
#12,407 vs #11,647
680 leads by 760 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#3,243 vs #1,971
680 leads by 1,272 places
05

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06

Written summary

07

Questions about this pairing

Which panel is better: Vikram Solar PARADEA VSMDH.66.AAA.05-660 or Vikram Solar PARADEA VSMDH.66.AAA.05-680?
According to our database: Vikram Solar PARADEA VSMDH.66.AAA.05-680 has higher module efficiency (21.89% vs 21.25%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Vikram Solar PARADEA VSMDH.66.AAA.05-660 and Vikram Solar PARADEA VSMDH.66.AAA.05-680?
Vikram Solar PARADEA VSMDH.66.AAA.05-660 has a module efficiency of 21.25%, while Vikram Solar PARADEA VSMDH.66.AAA.05-680 is 21.89%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Vikram Solar PARADEA VSMDH.66.AAA.05-660 use vs Vikram Solar PARADEA VSMDH.66.AAA.05-680?
Vikram Solar PARADEA VSMDH.66.AAA.05-660 uses PERC cells; Vikram Solar PARADEA VSMDH.66.AAA.05-680 uses PERC. 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 PARADEA VSMDH.66.AAA.05-660 and Vikram Solar PARADEA VSMDH.66.AAA.05-680?
Vikram Solar PARADEA VSMDH.66.AAA.05-660 has a 30 years power warranty; Vikram Solar PARADEA VSMDH.66.AAA.05-680 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 PARADEA VSMDH.66.AAA.05-660 and Vikram Solar PARADEA VSMDH.66.AAA.05-680 bifacial panels?
Both Vikram Solar PARADEA VSMDH.66.AAA.05-660 and Vikram Solar PARADEA VSMDH.66.AAA.05-680 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.