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WSMDi-405 vs WSMD-650 10 of 19 identical Swap Change panels

Waaree WSMDi-405 vs Waaree WSMD-650

Waaree WSMDi-405
WSMDi-405
405 Wp 20.28 % PERC
Open panel page Datasheet PDF
VS
Waaree WSMD-650
WSMD-650
650 Wp 20.82 % PERC
Open panel page Datasheet PDF
The verdict

WSMD-650 leads on the differences that matter

The largest is rated power: 245 W more power. 10 of 19 comparable parameters are identical.

See all 9 differences
How alike are they
10 of 19 comparable
parameters are identical
identical differs
01

What actually differs

9 of 19 parameters
Parameter WSMDi-405 WSMD-650 Difference
Rated power 405 Wp 650 Wp 245 W more power
Module efficiency 20.28 % 20.82 % 0.54 pp more efficient
Temperature coefficient -0.365 %/°C -0.340 %/°C 0.025 %/°C better in heat
Weight 22.0 kg 34.5 kg 12.5 kg lighter
Short-circuit current 11.40 A 17.84 A 6.44 A apart
Module area 1.997 m² 3.125 m² 1.128 m² apart
Power density 202.8 Wp/m² 208.0 Wp/m² 5.2 Wp/m² higher
Current at max power 10.61 A 17.16 A 6.55 A apart
Dimensions 1924x1038x35 mm 2400x1302x35 mm 1924x1038x35 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
WSMDi-405
13,126 kWh
WSMD-650
21,066 kWh
Lifetime gap
7,940 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario WSMDi-405 WSMD-650
Standard test conditions 25 °C 100.0% of rated power 405 W 650 W
Cool, bright day 40 °C 94.5% of rated power 383 W 617 W
Typical summer roof 55 °C 89.0% of rated power 361 W 584 W
Hot roof 70 °C 83.6% of rated power 338 W 551 W
03

Full specification

Parameter WSMDi-405 WSMD-650 Difference
Power and efficiency
Rated power 405 Wp 650 Wp +245 W for WSMD-650
Module efficiency 20.28 % 20.82 % +0.54 pp for WSMD-650
Power density 202.8 Wp/m² 208.0 Wp/m² +5.2 Wp/m² for WSMD-650
Open-circuit voltage 45.44 V 46.09 V Effectively the same
Voltage at max power 38.22 V 37.91 V Effectively the same
Short-circuit current 11.40 A 17.84 A 6.44 A apart
Current at max power 10.61 A 17.16 A 6.55 A apart
Temperature
Temperature coefficient -0.365 %/°C -0.340 %/°C +0.025 %/°C for WSMD-650
Mechanical
Dimensions 1924x1038x35 mm 2400x1302x35 mm 1924x1038x35 mm vs 2400x1302x35 mm
Module area 1.997 m² 3.125 m² 1.128 m² apart
Weight 22.0 kg 34.5 kg -12.5 kg for WSMDi-405
Weight per kWp 54.3 kg/kWp 53.1 kg/kWp Effectively the same
Warranty and degradation
Product warranty 12 yrs 12 yrs Same
Performance warranty 27 yrs 27 yrs Same
Annual degradation 0.55 %/yr 0.55 %/yr Same
Technology
Cell technology PERC PERC Same
Cell type Monocrystalline Monocrystalline Same
Cell count 132 132 Same
Bifacial No No Same
04

Against the whole database

14,005 panels
Efficiency
#11,853 vs #10,443
WSMD-650 leads by 1,410 places
Power density
#11,821 vs #10,477
WSMD-650 leads by 1,344 places
Heat behaviour
#13,045 vs #8,778
WSMD-650 leads by 4,267 places
Weight
#8,586 vs #6,836
WSMD-650 leads by 1,750 places
Warranty
#9,667 vs #9,667
Tied - the same position in the database
Overall
#11,980 vs #4,615
WSMD-650 leads by 7,365 places
05

More useful comparisons

Open the full database
Same series, other bin
Waaree WSMDi-405 vs Waaree WSMD-665
11 differences, the largest is module efficiency
Same series, other bin
Waaree WSMDi-405 vs Waaree WSMD-660
10 differences, the largest is module efficiency
Same series, other bin
Waaree WSMDi-405 vs Waaree WSMD-655
9 differences, the largest is module efficiency
Same series, other bin
Waaree WSMDi-405 vs Waaree WSMD-645
9 differences, the largest is rated power
Same series, other bin
Waaree WSMDi-405 vs Waaree WSMD-545
13 differences, the largest is module efficiency
Same series, other bin
Waaree WSMDi-405 vs Waaree WSMD-540
13 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Waaree WSMDi-405 or Waaree WSMD-650?
According to our database: Waaree WSMD-650 has higher module efficiency (20.82% vs 20.28%); Waaree WSMD-650 tolerates heat better (temp coeff -0.340%/°C vs -0.365%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Waaree WSMDi-405 and Waaree WSMD-650?
Waaree WSMDi-405 has a module efficiency of 20.28%, while Waaree WSMD-650 is 20.82%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Waaree WSMDi-405 use vs Waaree WSMD-650?
Waaree WSMDi-405 uses PERC cells; Waaree WSMD-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 WSMDi-405 and Waaree WSMD-650?
Waaree WSMDi-405 has a 27 years power warranty; Waaree WSMD-650 has a 27 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 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.