Waaree Bi-68-660 vs Waaree Bi-68-655
VS
The verdict
Identical on every published parameter
All 19 comparable parameters agree. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from.
How alike are they
19
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
0 of 19 parameters
What actually differs
Every comparable parameter agrees. The full specification is below.
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 (-0.340 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
660
21,390 kWh
655
21,228 kWh
Lifetime gap
162 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
660
655
Standard test conditions
25 °C
100.0% of rated power
660 W
655 W
Cool, bright day
40 °C
94.9% of rated power
626 W
622 W
Typical summer roof
55 °C
89.8% of rated power
593 W
588 W
Hot roof
70 °C
84.7% of rated power
559 W
555 W
03
Full specification
Parameter
660
655
Difference
Power and efficiency
Rated power
660 Wp
655 Wp
Effectively the same
Module efficiency
21.13 %
20.99 %
Effectively the same
Power density
211.2 Wp/m²
209.6 Wp/m²
Effectively the same
Open-circuit voltage
46.40 V
46.26 V
Effectively the same
Voltage at max power
38.06 V
37.94 V
Effectively the same
Short-circuit current
17.98 A
17.90 A
Effectively the same
Current at max power
17.35 A
17.29 A
Effectively the same
Temperature
Temperature coefficient
-0.340 %/°C
-0.340 %/°C
Same
Mechanical
Dimensions
2400x1302x35 mm
2400x1302x35 mm
Same
Module area
3.125 m²
3.125 m²
Same
Weight
39.0 kg
39.0 kg
Same
Weight per kWp
59.1 kg/kWp
59.5 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
12 yrs
12 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.55 %/yr
0.55 %/yr
Same
Technology
Cell technology
PERC
PERC
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
132
132
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#9,239
vs
#9,944
660 leads by 705 places
Power density
#9,251
vs
#9,923
660 leads by 672 places
Heat behaviour
#8,778
vs
#8,778
Tied - the same position in the database
Weight
#12,010
vs
#12,200
660 leads by 190 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#3,318
vs
#3,643
660 leads by 325 places
05
Open the full database
More useful comparisons
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3 differences, the largest is module efficiency
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Waaree Bi-68-660 vs Waaree Bi-66-595
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Same series, other bin
Waaree Bi-68-660 vs Waaree Bi-66-590
9 differences, the largest is rated power
06
Written summary
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07
Questions about this pairing
Which panel is better: Waaree Bi-68-660 or Waaree Bi-68-655?
According to our database: Waaree Bi-68-660 has higher module efficiency (21.13% vs 20.99%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Waaree Bi-68-660 and Waaree Bi-68-655?
Waaree Bi-68-660 has a module efficiency of 21.13%, while Waaree Bi-68-655 is 20.99%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Waaree Bi-68-660 use vs Waaree Bi-68-655?
Waaree Bi-68-660 uses PERC cells; Waaree Bi-68-655 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 Waaree Bi-68-660 and Waaree Bi-68-655?
Waaree Bi-68-660 has a 30 years power warranty; Waaree Bi-68-655 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 Waaree Bi-68-660 and Waaree Bi-68-655 bifacial panels?
Both Waaree Bi-68-660 and Waaree Bi-68-655 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 26 Waaree 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.