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66-600 vs 68-650 11 of 19 identical Swap Change panels

Waaree Bi-66-600 vs Waaree Bi-68-650

Waaree Bi-66-600
Bi-66-600
600 Wp 21.06 % PERC Bifacial
Open panel page Datasheet PDF
VS
Waaree Bi-68-650
Bi-68-650
650 Wp 20.82 % PERC Bifacial
Open panel page Datasheet PDF
The verdict

8 differences, and they point both ways

The largest is rated power: 50 W more power. 11 of 19 comparable parameters are identical.

See all 8 differences
How alike are they
11 of 19 comparable
parameters are identical
identical differs
01

What actually differs

8 of 19 parameters
Parameter 66-600 68-650 Difference
Rated power 600 Wp 650 Wp 50 W more power
Weight 35.5 kg 39.0 kg 3.5 kg lighter
Module area 2.851 m² 3.125 m² 0.273 m² apart
Open-circuit voltage 42.18 V 46.09 V 3.91 V apart
Module efficiency 21.06 % 20.82 % 0.24 pp more efficient
Cell count 120 132 12 cells apart
Voltage at max power 34.62 V 37.91 V 3.29 V apart
Dimensions 2190x1302x35 mm 2400x1302x35 mm 2190x1302x35 mm vs 2400x1302x35 mm
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.
66-600
19,445 kWh
68-650
21,066 kWh
Lifetime gap
1,621 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 66-600 68-650
Standard test conditions 25 °C 100.0% of rated power 600 W 650 W
Cool, bright day 40 °C 94.9% of rated power 569 W 617 W
Typical summer roof 55 °C 89.8% of rated power 539 W 584 W
Hot roof 70 °C 84.7% of rated power 508 W 551 W
03

Full specification

Parameter 66-600 68-650 Difference
Power and efficiency
Rated power 600 Wp 650 Wp +50 W for 68-650
Module efficiency 21.06 % 20.82 % +0.24 pp for 66-600
Power density 210.4 Wp/m² 208.0 Wp/m² Effectively the same
Open-circuit voltage 42.18 V 46.09 V 3.91 V apart
Voltage at max power 34.62 V 37.91 V 3.29 V apart
Short-circuit current 17.98 A 17.84 A Effectively the same
Current at max power 17.35 A 17.16 A Effectively the same
Temperature
Temperature coefficient -0.340 %/°C -0.340 %/°C Same
Mechanical
Dimensions 2190x1302x35 mm 2400x1302x35 mm 2190x1302x35 mm vs 2400x1302x35 mm
Module area 2.851 m² 3.125 m² 0.273 m² apart
Weight 35.5 kg 39.0 kg -3.5 kg for 66-600
Weight per kWp 59.2 kg/kWp 60.0 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 120 132 12 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#9,625 vs #10,443
66-600 leads by 818 places
Power density
#9,633 vs #10,477
66-600 leads by 844 places
Heat behaviour
#8,778 vs #8,778
Tied - the same position in the database
Weight
#12,042 vs #12,326
66-600 leads by 284 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#5,464 vs #4,037
68-650 leads by 1,427 places
05

More useful comparisons

Open the full database
Same series, other bin
Waaree Bi-66-600 vs Waaree Bi-68-665
8 differences, the largest is rated power
Same series, other bin
Waaree Bi-66-600 vs Waaree Bi-68-660
7 differences, the largest is rated power
Same series, other bin
Waaree Bi-66-600 vs Waaree Bi-68-655
7 differences, the largest is rated power
Same series, other bin
Waaree Bi-66-600 vs Waaree Bi-68-645
9 differences, the largest is rated power
Same series, other bin
Waaree Bi-66-600 vs Waaree Bi-66-595
The same specification on paper
Same series, other bin
Waaree Bi-66-600 vs Waaree Bi-66-590
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Waaree Bi-66-600 or Waaree Bi-68-650?
According to our database: Waaree Bi-66-600 has higher module efficiency (21.06% vs 20.82%). 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-68-650?
Waaree Bi-66-600 has a module efficiency of 21.06%, while Waaree Bi-68-650 is 20.82%. 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-68-650?
Waaree Bi-66-600 uses PERC cells; Waaree Bi-68-650 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-68-650?
Waaree Bi-66-600 has a 30 years power warranty; Waaree Bi-68-650 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-68-650 bifacial panels?
Both Waaree Bi-66-600 and Waaree Bi-68-650 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.