Waaree WSM-380 vs Waaree WS-335
VS
The verdict
WSM-380 leads on the differences that matter
The largest is module efficiency: 2.26 pp more efficient. 8 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.
See all 10 differencesHow alike are they
8
of 18 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
10 of 18 parameters
What actually differs
Parameter
WSM-380
WS-335
Difference
Module efficiency
19.08 %
16.82 %
2.26 pp more efficient
Rated power
380 Wp
335 Wp
45 W more power
Power density
190.9 Wp/m²
168.3 Wp/m²
22.6 Wp/m² higher
Weight per kWp
56.6 kg/kWp
64.2 kg/kWp
7.6 kg/kWp lighter
Temperature coefficient
-0.370 %/°C
-0.386 %/°C
0.016 %/°C better in heat
Open-circuit voltage
48.45 V
46.80 V
1.65 V apart
Short-circuit current
9.90 A
9.30 A
0.60 A apart
Cell type
Monocrystalline
Polycrystalline
Monocrystalline vs Polycrystalline
Voltage at max power
39.70 V
38.10 V
1.60 V apart
Current at max power
9.58 A
8.80 A
0.78 A apart
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
WSM-380
11,881 kWh
WS-335
10,534 kWh
Lifetime gap
1,347 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
WSM-380
WS-335
Standard test conditions
25 °C
100.0% of rated power
380 W
335 W
Cool, bright day
40 °C
94.2% of rated power
359 W
316 W
Typical summer roof
55 °C
88.4% of rated power
338 W
296 W
Hot roof
70 °C
82.6% of rated power
317 W
277 W
03
Full specification
Parameter
WSM-380
WS-335
Difference
Power and efficiency
Rated power
380 Wp
335 Wp
+45 W for WSM-380
Module efficiency
19.08 %
16.82 %
+2.26 pp for WSM-380
Power density
190.9 Wp/m²
168.3 Wp/m²
+22.6 Wp/m² for WSM-380
Open-circuit voltage
48.45 V
46.80 V
1.65 V apart
Voltage at max power
39.70 V
38.10 V
1.60 V apart
Short-circuit current
9.90 A
9.30 A
0.60 A apart
Current at max power
9.58 A
8.80 A
0.78 A apart
Temperature
Temperature coefficient
-0.370 %/°C
-0.386 %/°C
+0.016 %/°C for WSM-380
Mechanical
Dimensions
1985x1003x35 mm
1985x1003x35 mm
Same
Module area
1.991 m²
1.991 m²
Same
Weight
21.5 kg
21.5 kg
Same
Weight per kWp
56.6 kg/kWp
64.2 kg/kWp
-7.6 kg/kWp for WSM-380
Warranty and degradation
Product warranty
10 yrs
10 yrs
Same
Performance warranty
25 yrs
25 yrs
Same
Annual degradation
0.70 %/yr
0.70 %/yr
Same
Technology
Cell technology
PERC
-
Not published by Waaree
Cell type
Monocrystalline
Polycrystalline
Monocrystalline vs Polycrystalline
Cell count
72
72
Same
Bifacial
No
No
Same
04
14,129 panels
Against the whole database
Efficiency
#13,013
vs
#13,611
WSM-380 leads by 598 places
Power density
#12,990
vs
#13,608
WSM-380 leads by 618 places
Heat behaviour
#13,161
vs
#13,565
WSM-380 leads by 404 places
Weight
#10,813
vs
#13,071
WSM-380 leads by 2,258 places
Warranty
#9,912
vs
#9,912
Tied - the same position in the database
Overall
#12,943
vs
#13,529
WSM-380 leads by 586 places
05
Open the full database
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10 differences, the largest is module efficiency
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Waaree WSM-380 vs Waaree WS-340
10 differences, the largest is module efficiency
06
Written summary
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07
Questions about this pairing
Which panel is better: Waaree WSM-380 or Waaree WS-335?
According to our database: Waaree WSM-380 has higher module efficiency (19.08% vs 16.82%); Waaree WSM-380 tolerates heat better (temp coeff -0.370%/°C vs -0.386%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Waaree WSM-380 and Waaree WS-335?
Waaree WSM-380 has a module efficiency of 19.08%, while Waaree WS-335 is 16.82%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Waaree WSM-380 use vs Waaree WS-335?
Waaree WSM-380 uses PERC cells; Waaree WS-335 uses Polycrystalline. 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 WSM-380 and Waaree WS-335?
Waaree WSM-380 has a 25 years power warranty; Waaree WS-335 has a 25 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.
Shop prices: See 25 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.