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Yingli YL405DF54 e/2
Yingli Brand review

YL405DF54 e/2

405 Wp PERC Bifacial 70%
ComparePV verdict

Warranty pick, heavy for its output

Rank 11,573 of 14,129
Compare panels Datasheet PDF
Power (Wp)
405
Typical for its class
Efficiency (%)
20.70
Typical · median 20.60%
Density (Wp/m²)
207.4
Typical · median 206.2
Temp (%/°C)
-0.350
Typical · median -0.350
Weight (kg)
24.8
Weak · 2.8 kg above median
Warranty (yrs)
30
Strong · top 17%

The Yingli YLM 3.0 Mini 1 series is designed for installations where high power density is key, while maintaining a convenient and compact module format. This is an ideal solution for individuals and companies seeking to extract maximum performance from rooftops with limited surface area or more challenging roof geometries - without compromising on manufacturing quality. The series stands out due to its half-cell architecture, which helps reduce resistive losses and stabilizes module performance under partial shading. The applied multi-busbar technology improves current collection and increases resistance to microcracks, which is particularly important in Polish conditions (snow, wind, freeze-thaw cycles). The series also emphasizes high reliability in harsh environments, thanks to refined lamination and layer structure design. The YLM 3.0 Mini 1 will perform excellently in single-family homes, small and medium-sized businesses, and renovation projects where long-term, reliable performance and predictable energy yield are crucial.

Ranking

954 panels in the segment PERC 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 20.70% 20.60% Typical 10,842
Power density 207.4 206.2 Typical 10,702
Temperature coefficient -0.350 -0.350 Typical 10,489
Weight per kWp 61.2 53.0 Weak · bottom 8% 12,712
Performance warranty 30 yrs 25 yrs Strong · top 17% 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

1 positive · 1 caution
Best for

Residential, commercial, shaded-installations and cold-climate.

Not ideal for

Weight-limited structures.

Strengths
30 year performance warranty

Top 17% of the PERC 400-450 W segment, against a median of 25 yrs.

Watch-outs
61.2 kg per kWp

Bottom 8% of the PERC 400-450 W segment, against a median of 53.0. Ranked 12,712th in the whole database.

Notes from the database
  • At 20.7% efficiency, this panel is on par with typical PERC 400-450W modules
  • Power density of 207.4 W/m² matches the PERC 400-450W median
  • At -0.35%/°C, hot weather performance is typical for PERC 400-450W panels
  • At 24.8 kg, this panel is 2.8 kg heavier than the PERC 400-450W median (22.0 kg) - more demanding for installation crews
  • 70% bifaciality enables rear-side power generation, boosting yield by 4-10% on reflective surfaces

Specifications

Open datasheet PDF
Nominal power (Pmax) 405 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.70 % Typical Segment median 20.60%
Vmpp · Impp 30.71 V · 13.19 A Operating point at max power
Voc · Isc 37.10 V · 13.95 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1722×1134×30 mm · 1.95 m² of roof
Weight 24.8 kg Weak Weak · 2.8 kg above median
Cells 108 · PERC Monocrystalline
Bifaciality 70 % Rear output as a share of front
Coefficient Pmax -0.350 %/°C Typical median -0.350 of its segment
Coefficient Voc · Isc -0.280 · 0.050 %/°C
NOCT 39 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 30 years Strong top 17% · median 25 yrs
End-of-warranty output 85.0 % Equals 344 W guaranteed
Degradation 2.00 → 0.45 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Yingli in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 405 Wp appear here. The rest cover the whole series.

I-V / P-V Curves I-V / P-V Curves Whole series

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-
With bifacial gain
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.350 %/°C against a segment median of -0.350
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Filter these
Size
Panel Power Eff. Temp. Weight Difference
Yingli YL405DF54 e/2 405 W 20.70% -0.350 24.8 kg You are here
AIKO-455-MAH54Db 455 W 23.30% -0.260 24.0 kg +50 W, cooler, +2.6 pp
LR5-54HTH-455M 455 W 23.30% -0.290 20.8 kg +50 W, cooler, +2.6 pp
YL455CF54 e/2 455 W 23.30% -0.290 20.3 kg +50 W, cooler, +2.6 pp
ESM-455T 455 W 23.30% -0.310 21.0 kg +50 W, cooler, +2.6 pp
SE5-54HBC-455W 455 W 23.30% -0.290 20.8 kg +50 W, cooler, +2.6 pp
JST-EDMH-(445-465)W-TD (455W class) 455 W 23.30% -0.300 20.5 kg +50 W, cooler, +2.6 pp
LX-455M/182R-96+ GG 455 W 23.30% -0.260 23.5 kg +50 W, cooler, +2.6 pp
YL390D-37e 1/2 / YL390D-37e 1500V 1/2 390 W 20.00% -0.350 21.5 kg Lighter, -0.7 pp, -5 yr warranty
YL395D-37e 1/2 / YL395D-37e 1500V 1/2 395 W 20.20% -0.350 21.5 kg Lighter, -0.5 pp, -5 yr warranty
YL400D-37e 1/2 / YL400D-37e 1500V 1/2 400 W 20.50% -0.350 21.5 kg Lighter, -5 yr warranty
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +105 W, cooler, +4.3 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +90 W, cooler, +4.1 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +100 W, cooler, +4.0 pp
WST-505BKX54-A2 505 W 24.70% -0.260 25.0 kg +100 W, cooler, +4.0 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +85 W, cooler, +3.8 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +95 W, cooler, +3.8 pp

Found 1797 panels of the same or similar size to this one, within ±10 mm. See them here Found 1928 panels of the same or similar size to this one, within ±25 mm. See them here Found 3413 panels of the same or similar size to this one, within ±50 mm. See them here Found 4007 panels of the same or similar size to this one, within ±100 mm. See them here

About the YLM 3.0 Mini 1 series

6 answered

These answers cover the whole series. Where a figure differs, the specification above is this module's own.

What is the maximum power output of the Yingli YLM 3.0 Mini 1 panel?
Panels from the YLM 3.0 Mini 1 series reach a maximum power output of up to 415 Wp. Given the module's compact mini format, this represents a very good power density, allowing more energy to be generated from a limited roof area compared to older, less efficient module designs.
Is the Yingli YLM 3.0 Mini 1 suitable for roofs with limited space or unusual geometry?
Yes, this is one of the series' main use cases. The compact module format makes it easier to fit smaller roof sections, dormers, or complex roof shapes. The half-cut cell architecture also improves performance under partial shading, which is common on such roofs.
What warranty comes with the Yingli YLM 3.0 Mini 1 panels?
The manufacturer offers a 12-year product warranty and a 30-year power performance warranty. Yingli is a tier 1 manufacturer, which further increases confidence that the warranty will actually be honored over such a long time horizon, not just exist on paper.
How does the PERC technology in the YLM 3.0 Mini 1 differ from standard cells?
PERC cells feature an additional passivation layer on the rear side that reflects unused light back into the cell, increasing conversion efficiency. Combined with multi-busbar technology, this improves current collection and reduces losses, resulting in higher energy yield from the same panel surface area.
Does the YLM 3.0 Mini 1 perform well in Polish climate conditions?
Yes, the series is designed for demanding operating conditions such as snow, strong wind, and freeze-thaw cycles. Multi-busbar technology increases resistance to microcracks, while careful lamination and layer construction reduce the risk of module degradation in variable climates.
Is the YLM 3.0 Mini 1 a bifacial panel?
No, the YLM 3.0 Mini 1 series uses monofacial PERC cells, generating power only from the front side of the module. This makes it well suited for standard rooftop installations, where the module is mounted directly on the roof surface with no light access from the rear.
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