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580 vs 600 15 of 19 identical Swap Change panels

Waaree Bi-66-580 vs Waaree Bi-66-600

Waaree Bi-66-580
Bi-66-580
580 Wp 20.35 % PERC Bifacial
Open panel page Datasheet PDF
VS
Waaree Bi-66-600
Bi-66-600
600 Wp 21.06 % PERC Bifacial
Open panel page Datasheet PDF
The verdict

600 leads on the differences that matter

The largest is module efficiency: 0.71 pp more efficient. 15 of 19 comparable parameters are identical.

See all 4 differences
How alike are they
15 of 19 comparable
parameters are identical
identical differs
01

What actually differs

4 of 19 parameters
Parameter 580 600 Difference
Module efficiency 20.35 % 21.06 % 0.71 pp more efficient
Power density 203.4 Wp/m² 210.4 Wp/m² 7.0 Wp/m² higher
Rated power 580 Wp 600 Wp 20 W more power
Weight per kWp 61.2 kg/kWp 59.2 kg/kWp 2.0 kg/kWp lighter
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.
580
18,797 kWh
600
19,445 kWh
Lifetime gap
648 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 580 600
Standard test conditions 25 °C 100.0% of rated power 580 W 600 W
Cool, bright day 40 °C 94.9% of rated power 550 W 569 W
Typical summer roof 55 °C 89.8% of rated power 521 W 539 W
Hot roof 70 °C 84.7% of rated power 491 W 508 W
03

Full specification

Parameter 580 600 Difference
Power and efficiency
Rated power 580 Wp 600 Wp +20 W for 600
Module efficiency 20.35 % 21.06 % +0.71 pp for 600
Power density 203.4 Wp/m² 210.4 Wp/m² +7.0 Wp/m² for 600
Open-circuit voltage 41.56 V 42.18 V Effectively the same
Voltage at max power 34.21 V 34.62 V Effectively the same
Short-circuit current 17.73 A 17.98 A Effectively the same
Current at max power 16.96 A 17.35 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 61.2 kg/kWp 59.2 kg/kWp -2.0 kg/kWp for 600
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

Against the whole database

14,005 panels
Efficiency
#11,718 vs #9,625
600 leads by 2,093 places
Power density
#11,699 vs #9,633
600 leads by 2,066 places
Heat behaviour
#8,778 vs #8,778
Tied - the same position in the database
Weight
#12,612 vs #12,042
600 leads by 570 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#7,089 vs #5,464
600 leads by 1,625 places
05

More useful comparisons

Open the full database
Same series, other bin
Waaree Bi-66-580 vs Waaree Bi-68-665
11 differences, the largest is module efficiency
Same series, other bin
Waaree Bi-66-580 vs Waaree Bi-68-660
10 differences, the largest is module efficiency
Same series, other bin
Waaree Bi-66-580 vs Waaree Bi-68-655
9 differences, the largest is rated power
Same series, other bin
Waaree Bi-66-580 vs Waaree Bi-68-650
9 differences, the largest is rated power
Same series, other bin
Waaree Bi-66-580 vs Waaree Bi-68-645
9 differences, the largest is rated power
Same series, other bin
Waaree Bi-66-580 vs Waaree Bi-66-595
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Waaree Bi-66-580 or Waaree Bi-66-600?
According to our database: Waaree Bi-66-600 has higher module efficiency (21.06% vs 20.35%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Waaree Bi-66-580 and Waaree Bi-66-600?
Waaree Bi-66-580 has a module efficiency of 20.35%, while Waaree Bi-66-600 is 21.06%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Waaree Bi-66-580 use vs Waaree Bi-66-600?
Waaree Bi-66-580 uses PERC cells; Waaree Bi-66-600 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-66-580 and Waaree Bi-66-600?
Waaree Bi-66-580 has a 30 years power warranty; Waaree Bi-66-600 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-66-580 and Waaree Bi-66-600 bifacial panels?
Both Waaree Bi-66-580 and Waaree Bi-66-600 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.

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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.