Waaree Bi-66-600 vs Waaree Bi-66-585
VS
The verdict
600 leads on the differences that matter
The largest is module efficiency: 0.54 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
600
585
Difference
Module efficiency
21.06 %
20.52 %
0.54 pp more efficient
Power density
210.4 Wp/m²
205.2 Wp/m²
5.3 Wp/m² higher
Rated power
600 Wp
585 Wp
15 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 (-0.340 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
600
19,445 kWh
585
18,959 kWh
Lifetime gap
486 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
600
585
Standard test conditions
25 °C
100.0% of rated power
600 W
585 W
Cool, bright day
40 °C
94.9% of rated power
569 W
555 W
Typical summer roof
55 °C
89.8% of rated power
539 W
525 W
Hot roof
70 °C
84.7% of rated power
508 W
495 W
03
Full specification
Parameter
600
585
Difference
Power and efficiency
Rated power
600 Wp
585 Wp
+15 W for 600
Module efficiency
21.06 %
20.52 %
+0.54 pp for 600
Power density
210.4 Wp/m²
205.2 Wp/m²
+5.3 Wp/m² for 600
Open-circuit voltage
42.18 V
41.76 V
Effectively the same
Voltage at max power
34.62 V
34.34 V
Effectively the same
Short-circuit current
17.98 A
17.78 A
Effectively the same
Current at max power
17.35 A
17.04 A
Effectively the same
Temperature
Temperature coefficient
-0.340 %/°C
-0.340 %/°C
Same
Mechanical
Dimensions
2190x1302x35 mm
2190x1302x35 mm
Same
Module area
2.851 m²
2.851 m²
Same
Weight
35.5 kg
35.5 kg
Same
Weight per kWp
59.2 kg/kWp
60.7 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
12 yrs
12 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.55 %/yr
0.55 %/yr
Same
Technology
Cell technology
PERC
PERC
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
120
120
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#9,625
vs
#11,244
600 leads by 1,619 places
Power density
#9,633
vs
#11,293
600 leads by 1,660 places
Heat behaviour
#8,778
vs
#8,778
Tied - the same position in the database
Weight
#12,042
vs
#12,517
600 leads by 475 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#5,464
vs
#6,692
600 leads by 1,228 places
05
Open the full database
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The same specification on paper
06
Written summary
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07
Questions about this pairing
Which panel is better: Waaree Bi-66-600 or Waaree Bi-66-585?
According to our database: Waaree Bi-66-600 has higher module efficiency (21.06% vs 20.52%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Waaree Bi-66-600 and Waaree Bi-66-585?
Waaree Bi-66-600 has a module efficiency of 21.06%, while Waaree Bi-66-585 is 20.52%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Waaree Bi-66-600 use vs Waaree Bi-66-585?
Waaree Bi-66-600 uses PERC cells; Waaree Bi-66-585 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-66-600 and Waaree Bi-66-585?
Waaree Bi-66-600 has a 30 years power warranty; Waaree Bi-66-585 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-66-600 and Waaree Bi-66-585 bifacial panels?
Both Waaree Bi-66-600 and Waaree Bi-66-585 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.