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625 vs 635 16 of 19 identical Swap Change panels

Waaree BiN-21-625 vs Waaree BiN-21-635

BiN-21-625
625 Wp 23.14 % TOPCon Bifacial
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VS
BiN-21-635
635 Wp 23.51 % TOPCon Bifacial
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The verdict

635 leads on the differences that matter

The largest is module efficiency: 0.37 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 625 635 Difference
Module efficiency 23.14 % 23.51 % 0.37 pp more efficient
Power density 231.4 Wp/m² 235.1 Wp/m² 3.7 Wp/m² higher
Rated power 625 Wp 635 Wp 10 W more power
02

What it means on a roof

Thirty years of production
Declared annual degradation, with a 1.0% first-year loss assumed for both panels because at least one datasheet omits it, at 1,200 kWh/kWp a year
Same temp coeff. for both panels (-0.300 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
625
20,970 kWh
635
21,306 kWh
Lifetime gap
336 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 625 635
Standard test conditions 25 °C 100.0% of rated power 625 W 635 W
Cool, bright day 40 °C 95.5% of rated power 597 W 606 W
Typical summer roof 55 °C 91.0% of rated power 569 W 578 W
Hot roof 70 °C 86.5% of rated power 541 W 549 W
03

Full specification

Parameter 625 635 Difference
Power and efficiency
Rated power 625 Wp 635 Wp +10 W for 635
Module efficiency 23.14 % 23.51 % +0.37 pp for 635
Power density 231.4 Wp/m² 235.1 Wp/m² +3.7 Wp/m² for 635
Open-circuit voltage 49.30 V 49.70 V Effectively the same
Voltage at max power 41.53 V 41.91 V Effectively the same
Short-circuit current 16.07 A 16.17 A Effectively the same
Current at max power 15.05 A 15.15 A Effectively the same
Temperature
Temperature coefficient -0.300 %/°C -0.300 %/°C Same
Mechanical
Dimensions 2382x1134x35 mm 2382x1134x35 mm Same
Module area 2.701 m² 2.701 m² Same
Weight 33.8 kg 33.8 kg Same
Weight per kWp 54.1 kg/kWp 53.2 kg/kWp Effectively the same
Warranty and degradation
Product warranty 12 yrs 12 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.40 %/yr Same
Technology
Cell technology TOPCon TOPCon Same
Cell type Monocrystalline Monocrystalline Same
Cell count 132 132 Same
Bifacial Yes Yes Same
04

Against the whole database

13,953 panels
Efficiency
#1,490 vs #688
635 leads by 802 places
Power density
#1,494 vs #731
635 leads by 763 places
Heat behaviour
#6,051 vs #6,051
Tied - the same position in the database
Weight
#8,250 vs #7,029
635 leads by 1,221 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#2,236 vs #1,743
635 leads by 493 places
05

More useful comparisons

Open the full database
Same series, other bin
Waaree BiN-21-625 vs Waaree BiN-21-630
The same specification on paper
Same series, other bin
Waaree BiN-21-625 vs Waaree BiN-21-620
The same specification on paper
Same series, other bin
Waaree BiN-21-625 vs Waaree BiN-21-615
3 differences, the largest is module efficiency
Same series, other bin
Waaree BiN-21-625 vs Waaree BiN-21-610
3 differences, the largest is module efficiency
Same series, other bin
Waaree BiN-21-625 vs Waaree BiN-21-605
3 differences, the largest is module efficiency
Same series, other bin
Waaree BiN-21-625 vs Waaree BiN-21-600
5 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Waaree BiN-21-625 or Waaree BiN-21-635?
According to our database: Waaree BiN-21-635 has higher module efficiency (23.51% vs 23.14%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Waaree BiN-21-625 and Waaree BiN-21-635?
Waaree BiN-21-625 has a module efficiency of 23.14%, while Waaree BiN-21-635 is 23.51%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Waaree BiN-21-625 use vs Waaree BiN-21-635?
Waaree BiN-21-625 uses TOPCon cells; Waaree BiN-21-635 uses TOPCon. 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 BiN-21-625 and Waaree BiN-21-635?
Waaree BiN-21-625 has a 30 years power warranty; Waaree BiN-21-635 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 BiN-21-625 and Waaree BiN-21-635 bifacial panels?
Both Waaree BiN-21-625 and Waaree BiN-21-635 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 28 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.