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450 M vs 580 MV 6 of 19 identical Swap Change panels

FuturaSun FU 450 M vs FuturaSun FU 580 MV

FuturaSun
FU 450 M
450 Wp 22.52 % PERC
Open panel page Datasheet PDF
VS
FuturaSun
FU 580 MV
580 Wp 22.40 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

13 differences, and they point both ways

The largest is rated power: 130 W more power. 6 of 19 comparable parameters are identical.

See all 13 differences
How alike are they
6 of 19 comparable
parameters are identical
identical differs
01

What actually differs

13 of 19 parameters
Parameter 450 M 580 MV Difference
Rated power 450 Wp 580 Wp 130 W more power
Performance warranty 25 yrs 30 yrs 5 yrs longer
Weight 21.3 kg 32.0 kg 10.7 kg lighter
Weight per kWp 47.3 kg/kWp 55.2 kg/kWp 7.8 kg/kWp lighter
Open-circuit voltage 35.47 V 51.00 V 15.53 V apart
Module area 1.998 m² 2.583 m² 0.585 m² apart
Short-circuit current 15.97 A 14.48 A 1.49 A apart
Cell technology PERC TOPCon PERC vs TOPCon
Voltage at max power 30.01 V 42.34 V 12.33 V apart
Cell count 96 144 48 cells apart
Bifacial No Yes No vs Yes
Current at max power 15.00 A 13.70 A 1.30 A apart
Dimensions 1762x1134x30 mm 2278x1134x30 mm 1762x1134x30 mm vs 2278x1134x30 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 (-0.290 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
450 M
15,098 kWh
580 MV
19,460 kWh
Lifetime gap
4,362 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 450 M 580 MV
Standard test conditions 25 °C 100.0% of rated power 450 W 580 W
Cool, bright day 40 °C 95.7% of rated power 430 W 555 W
Typical summer roof 55 °C 91.3% of rated power 411 W 530 W
Hot roof 70 °C 87.0% of rated power 391 W 504 W
03

Full specification

Parameter 450 M 580 MV Difference
Power and efficiency
Rated power 450 Wp 580 Wp +130 W for 580 MV
Module efficiency 22.52 % 22.40 % Effectively the same
Power density 225.2 Wp/m² 224.5 Wp/m² Effectively the same
Open-circuit voltage 35.47 V 51.00 V 15.53 V apart
Voltage at max power 30.01 V 42.34 V 12.33 V apart
Short-circuit current 15.97 A 14.48 A 1.49 A apart
Current at max power 15.00 A 13.70 A 1.30 A apart
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 1762x1134x30 mm 2278x1134x30 mm 1762x1134x30 mm vs 2278x1134x30 mm
Module area 1.998 m² 2.583 m² 0.585 m² apart
Weight 21.3 kg 32.0 kg -10.7 kg for 450 M
Weight per kWp 47.3 kg/kWp 55.2 kg/kWp -7.8 kg/kWp for 450 M
Warranty and degradation
Product warranty 15 yrs 15 yrs Same
Performance warranty 25 yrs 30 yrs +5 yrs for 580 MV
Annual degradation 0.40 %/yr 0.40 %/yr Same
Technology
Cell technology PERC TOPCon PERC vs TOPCon
Cell type Monocrystalline Monocrystalline Same
Cell count 96 144 48 cells apart
Bifacial No Yes No vs Yes
04

Against the whole database

14,129 panels
Efficiency
#4,167 vs #4,834
450 M leads by 667 places
Power density
#4,284 vs #4,607
450 M leads by 323 places
Heat behaviour
#2,220 vs #2,220
Tied - the same position in the database
Weight
#1,641 vs #9,671
450 M leads by 8,030 places
Warranty
#9,912 vs #21
580 MV leads by 9,891 places
Overall
#9,413 vs #4,065
580 MV leads by 5,348 places
05

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06

Written summary

07

Questions about this pairing

Which panel is better: FuturaSun FU 450 M or FuturaSun FU 580 MV?
According to our database: FuturaSun FU 450 M has higher module efficiency (22.52% vs 22.40%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of FuturaSun FU 450 M and FuturaSun FU 580 MV?
FuturaSun FU 450 M has a module efficiency of 22.52%, while FuturaSun FU 580 MV is 22.40%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does FuturaSun FU 450 M use vs FuturaSun FU 580 MV?
FuturaSun FU 450 M uses PERC cells; FuturaSun FU 580 MV 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 FuturaSun FU 450 M and FuturaSun FU 580 MV?
FuturaSun FU 450 M has a 25 years power warranty; FuturaSun FU 580 MV 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 FuturaSun FU 450 M and FuturaSun FU 580 MV bifacial panels?
FuturaSun FU 580 MV is bifacial (captures light from both faces); FuturaSun FU 450 M is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

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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.