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SOLID Black Frameless 455 vs Forza 650 5 of 19 identical Swap Change panels

Solitek SOLID Black Frameless 455 vs Solitek Forza 650

Solitek
SOLID Black Frameless 455
455 Wp 22.57 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Solitek
Forza 650
650 Wp 22.97 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

Forza 650 leads on the differences that matter

The largest is rated power: 195 W more power. 5 of 19 comparable parameters are identical.

See all 14 differences
How alike are they
5 of 19 comparable
parameters are identical
identical differs
01

What actually differs

14 of 19 parameters
Parameter SOLID Black Frameless 455 Forza 650 Difference
Rated power 455 Wp 650 Wp 195 W more power
Weight per kWp 72.5 kg/kWp 52.6 kg/kWp 19.9 kg/kWp lighter
Product warranty 30 yrs 25 yrs 5 yrs longer
Module efficiency 22.57 % 22.97 % 0.40 pp more efficient
Open-circuit voltage 34.82 V 44.28 V 9.46 V apart
Short-circuit current 15.97 A 18.48 A 2.51 A apart
Module area 2.016 m² 2.830 m² 0.815 m² apart
Annual degradation 0.31 %/yr 0.40 %/yr 0.09 %/yr slower
Power density 225.7 Wp/m² 229.7 Wp/m² 3.9 Wp/m² higher
Voltage at max power 29.71 V 37.30 V 7.59 V apart
Current at max power 15.31 A 17.43 A 2.12 A apart
Cell count 96 120 24 cells apart
Weight 33.0 kg 34.2 kg 1.2 kg lighter
Dimensions 1768x1140x7 mm 2172x1303x30 mm 1768x1140x7 mm vs 2172x1303x30 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 (-0.300 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
SOLID Black Frameless 455
15,480 kWh
Forza 650
21,809 kWh
Lifetime gap
6,329 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario SOLID Black Frameless 455 Forza 650
Standard test conditions 25 °C 100.0% of rated power 455 W 650 W
Cool, bright day 40 °C 95.5% of rated power 435 W 621 W
Typical summer roof 55 °C 91.0% of rated power 414 W 592 W
Hot roof 70 °C 86.5% of rated power 394 W 562 W
03

Full specification

Parameter SOLID Black Frameless 455 Forza 650 Difference
Power and efficiency
Rated power 455 Wp 650 Wp +195 W for Forza 650
Module efficiency 22.57 % 22.97 % +0.40 pp for Forza 650
Power density 225.7 Wp/m² 229.7 Wp/m² +3.9 Wp/m² for Forza 650
Open-circuit voltage 34.82 V 44.28 V 9.46 V apart
Voltage at max power 29.71 V 37.30 V 7.59 V apart
Short-circuit current 15.97 A 18.48 A 2.51 A apart
Current at max power 15.31 A 17.43 A 2.12 A apart
Temperature
Temperature coefficient -0.300 %/°C -0.300 %/°C Same
Mechanical
Dimensions 1768x1140x7 mm 2172x1303x30 mm 1768x1140x7 mm vs 2172x1303x30 mm
Module area 2.016 m² 2.830 m² 0.815 m² apart
Weight 33.0 kg 34.2 kg -1.2 kg for SOLID Black Frameless 455
Weight per kWp 72.5 kg/kWp 52.6 kg/kWp -19.9 kg/kWp for Forza 650
Warranty and degradation
Product warranty 30 yrs 25 yrs +5 yrs for SOLID Black Frameless 455
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.31 %/yr 0.40 %/yr -0.09 %/yr for SOLID Black Frameless 455
Technology
Cell technology TOPCon TOPCon Same
Cell type Monocrystalline Monocrystalline Same
Cell count 96 120 24 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#3,882 vs #2,237
Forza 650 leads by 1,645 places
Power density
#3,838 vs #2,160
Forza 650 leads by 1,678 places
Heat behaviour
#6,093 vs #6,093
Tied - the same position in the database
Weight
#13,518 vs #6,240
Forza 650 leads by 7,278 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#5,172 vs #551
Forza 650 leads by 4,621 places
05

More useful comparisons

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Solitek SOLID Black Frameless 455 vs Solitek SOLID Framed White 650W
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06

Written summary

07

Questions about this pairing

Which panel is better: Solitek SOLID Black Frameless 455 or Solitek Forza 650?
According to our database: Solitek Forza 650 has higher module efficiency (22.97% vs 22.57%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Solitek SOLID Black Frameless 455 and Solitek Forza 650?
Solitek SOLID Black Frameless 455 has a module efficiency of 22.57%, while Solitek Forza 650 is 22.97%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Solitek SOLID Black Frameless 455 use vs Solitek Forza 650?
Solitek SOLID Black Frameless 455 uses TOPCon cells; Solitek Forza 650 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 Solitek SOLID Black Frameless 455 and Solitek Forza 650?
Solitek SOLID Black Frameless 455 has a 30 years power warranty; Solitek Forza 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 Solitek SOLID Black Frameless 455 and Solitek Forza 650 bifacial panels?
Both Solitek SOLID Black Frameless 455 and Solitek Forza 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.

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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.