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

Solitek Forza 650 vs Solitek SOLID Black Frameless 455

Q: Which panel is better: Solitek Forza 650 or Solitek SOLID Black Frameless 455?

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.

Q: What is the efficiency of Solitek Forza 650 and Solitek SOLID Black Frameless 455?

Solitek Forza 650 has a module efficiency of 22.97%, while Solitek SOLID Black Frameless 455 is 22.57%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does Solitek Forza 650 use vs Solitek SOLID Black Frameless 455?

Solitek Forza 650 uses TOPCon cells; Solitek SOLID Black Frameless 455 uses TOPCon. Modern n-type technologies (TOPCon, HJT, BC) typically deliver higher efficiency and lower degradation compared to older PERC (p-type) cells.

Q: What is the warranty on Solitek Forza 650 and Solitek SOLID Black Frameless 455?

Solitek Forza 650 has a 30 years power warranty; Solitek SOLID Black Frameless 455 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.

Q: Are Solitek Forza 650 and Solitek SOLID Black Frameless 455 bifacial panels?

Both Solitek Forza 650 and Solitek SOLID Black Frameless 455 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.

Solitek

Forza 650

650 Wp 22.97 % TOPCon Bifacial

Open panel page Datasheet PDF

Solitek

SOLID Black Frameless 455

455 Wp 22.57 % 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

What actually differs

14 of 19 parameters

Parameter Forza 650 SOLID Black Frameless 455 Difference

Rated power 650 Wp 455 Wp 195 W more power

Weight per kWp 52.6 kg/kWp 72.5 kg/kWp 19.9 kg/kWp lighter

Product warranty 25 yrs 30 yrs 5 yrs longer

Module efficiency 22.97 % 22.57 % 0.40 pp more efficient

Open-circuit voltage 44.28 V 34.82 V 9.46 V apart

Short-circuit current 18.48 A 15.97 A 2.51 A apart

Module area 2.830 m² 2.016 m² 0.815 m² apart

Annual degradation 0.40 %/yr 0.31 %/yr 0.09 %/yr slower

Power density 229.7 Wp/m² 225.7 Wp/m² 3.9 Wp/m² higher

Voltage at max power 37.30 V 29.71 V 7.59 V apart

Current at max power 17.43 A 15.31 A 2.12 A apart

Cell count 120 96 24 cells apart

Weight 34.2 kg 33.0 kg 1.2 kg lighter

Dimensions 2172x1303x30 mm 1768x1140x7 mm 2172x1303x30 mm vs 1768x1140x7 mm

What it means on a roof

Thirty years of production

Each panel's own declared degradation curve, at 1,200 kWh/kWp a year

Cell temperature

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.

Forza 650

21,809 kWh

SOLID Black Frameless 455

15,480 kWh

Lifetime gap

6,329 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario Forza 650 SOLID Black Frameless 455

Standard test conditions 25 °C 100.0% of rated power 650 W 455 W

Cool, bright day 40 °C 95.5% of rated power 621 W 435 W

Typical summer roof 55 °C 91.0% of rated power 592 W 414 W

Hot roof 70 °C 86.5% of rated power 562 W 394 W

Full specification

Parameter Forza 650 SOLID Black Frameless 455 Difference

Power and efficiency

Rated power 650 Wp 455 Wp +195 W for Forza 650

Module efficiency 22.97 % 22.57 % +0.40 pp for Forza 650

Power density 229.7 Wp/m² 225.7 Wp/m² +3.9 Wp/m² for Forza 650

Open-circuit voltage 44.28 V 34.82 V 9.46 V apart

Voltage at max power 37.30 V 29.71 V 7.59 V apart

Short-circuit current 18.48 A 15.97 A 2.51 A apart

Current at max power 17.43 A 15.31 A 2.12 A apart

Temperature

Temperature coefficient -0.300 %/°C -0.300 %/°C Same

Mechanical

Dimensions 2172x1303x30 mm 1768x1140x7 mm 2172x1303x30 mm vs 1768x1140x7 mm

Module area 2.830 m² 2.016 m² 0.815 m² apart

Weight 34.2 kg 33.0 kg -1.2 kg for SOLID Black Frameless 455

Weight per kWp 52.6 kg/kWp 72.5 kg/kWp -19.9 kg/kWp for Forza 650

Warranty and degradation

Product warranty 25 yrs 30 yrs +5 yrs for SOLID Black Frameless 455

Performance warranty 30 yrs 30 yrs Same

Annual degradation 0.40 %/yr 0.31 %/yr -0.09 %/yr for SOLID Black Frameless 455

Technology

Cell technology TOPCon TOPCon Same

Cell type Monocrystalline Monocrystalline Same

Cell count 120 96 24 cells apart

Bifacial Yes Yes Same

Against the whole database

14,005 panels

Efficiency

#2,237 vs #3,882

Forza 650 leads by 1,645 places

Power density

#2,160 vs #3,838

Forza 650 leads by 1,678 places

Heat behaviour

#6,093 vs #6,093

Tied - the same position in the database

Weight

#6,240 vs #13,518

Forza 650 leads by 7,278 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#551 vs #5,172

Forza 650 leads by 4,621 places

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Written summary

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Questions about this pairing

Which panel is better: Solitek Forza 650 or Solitek SOLID Black Frameless 455?

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 Forza 650 and Solitek SOLID Black Frameless 455?

Solitek Forza 650 has a module efficiency of 22.97%, while Solitek SOLID Black Frameless 455 is 22.57%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

What cell technology does Solitek Forza 650 use vs Solitek SOLID Black Frameless 455?

Solitek Forza 650 uses TOPCon cells; Solitek SOLID Black Frameless 455 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 Forza 650 and Solitek SOLID Black Frameless 455?

Solitek Forza 650 has a 30 years power warranty; Solitek SOLID Black Frameless 455 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 Forza 650 and Solitek SOLID Black Frameless 455 bifacial panels?

Both Solitek Forza 650 and Solitek SOLID Black Frameless 455 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 20 Solitek 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.