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Yingli YL555D-49e 1/2 / YL555D-49e 1500V 1/2
Yingli Brand review

YL555D-49e 1/2 / YL555D-49e 1500V 1/2

555 Wp PERC
ComparePV verdict

Efficiency leader, short guarantee

Rank 7,655 of 14,129
Compare panels Datasheet PDF
Power (Wp)
555
Typical for its class
Efficiency (%)
21.50
Strong · top 18%
Density (Wp/m²)
214.8
Strong · top 20%
Temp (%/°C)
-0.350
Typical · median -0.350
Weight (kg)
28.0
Typical · median 30.8 kg
Warranty (yrs)
25
Weak · bottom 24%

Yingli YLM 3.0 Pro 1 modules are monocrystalline, based on P-type PERC cell technology, designed for stable performance in real-world operating conditions, not just in the lab. The use of large cell formats and a half-cut configuration translates to lower internal losses and better tolerance to partial shading - crucial on rooftops with chimneys, window wells, or edge-mounted installations.

These modules also boast high weather resistance, thanks to refined lamination materials and a robust construction, facilitating safe mounting on rooftop and ground structures. The series offers positive power tolerance, ensuring that installers and investors achieve predictable yield without the risk of an underperforming module in a string.

The YLM 3.0 Pro 1 is suitable for projects targeting commercial and agricultural applications, as well as larger consumer-scale systems, where reliable energy output, longevity, and easy integration with standard inverters matter. What sets it apart is its practical approach - a focus on reliability and steady investment returns, rather than chasing mere claims.

Ranking

589 panels in the segment PERC 550-600 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.50% 21.29% Strong · top 18% 8,022
Power density 214.8 212.9 Strong · top 20% 8,099
Temperature coefficient -0.350 -0.350 Typical 10,489
Weight per kWp 50.5 52.7 Typical 3,834
Performance warranty 25 yrs 27 yrs Weak · bottom 24% 9,912
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

2 positive · 1 caution
Best for

Residential, commercial and shaded-installations.

Not ideal for

Owners who want a long output guarantee.

Strengths
21.50% module efficiency

Top 18% of the PERC 550-600 W segment, against a median of 21.29%.

214.8 watts per square metre

Top 20% of the PERC 550-600 W segment, against a median of 212.9.

Watch-outs
25 year performance warranty

Bottom 24% of the PERC 550-600 W segment, against a median of 27 yrs.

Notes from the database
  • Efficiency of 21.5% matches the PERC 550-600W median
  • Power density of 214.8 W/m² matches the PERC 550-600W median
  • At -0.35%/°C, hot weather performance is typical for PERC 550-600W panels
  • At 28.0 kg, this panel is 2.8 kg lighter than PERC 550-600W median (30.8 kg) - easier handling during installation
  • Ranked #8022 out of 14129 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 555 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.50 % Strong Segment median 21.29%
Vmpp · Impp 42.15 V · 13.17 A Operating point at max power
Voc · Isc 49.97 V · 14.04 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2278×1134×30 mm · 2.58 m² of roof
Weight 28.0 kg Typical Typical · median 30.8 kg
Cells 144 · PERC Monocrystalline
Coefficient Pmax -0.350 %/°C Typical median -0.350 of its segment
Coefficient Voc · Isc -0.270 · 0.050 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 25 years Weak bottom 24% · median 27 yrs
End-of-warranty output 84.8 % Equals 455 W guaranteed
Degradation 2.00 → 0.55 % 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 555 Wp appear here. The rest cover the whole series.

YLM Linear Power Warranty Degradation Chart YLM Linear Power Warranty Degradation Chart 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
-

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
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Yingli YL555D-49e 1/2 / YL555D-49e 1500V 1/2 555 W 21.50% -0.350 28.0 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, +3.5 pp, +5 yr warranty
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg Cooler, +3.3 pp, +5 yr warranty
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg -50 W, cooler, +3.2 pp
WST-505BKX54-A2 505 W 24.70% -0.260 25.0 kg -50 W, cooler, +3.2 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg Cooler, +3.1 pp, +5 yr warranty
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg Cooler, lighter, +2.9 pp
YL530DF72 e/2 530 W 20.50% -0.350 32.0 kg Heavier, -1.0 pp, +5 yr warranty
YL535DF72 e/2 535 W 20.70% -0.350 32.0 kg Heavier, -0.8 pp, +5 yr warranty
LF535M10-72H 535 W 20.70% -0.354 28.5 kg -20 W, -0.8 pp
YL540DF72 e/2 540 W 20.90% -0.350 32.0 kg Heavier, -0.6 pp, +5 yr warranty
LF540M10-72H 540 W 20.90% -0.354 28.5 kg -15 W, -0.6 pp
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg +95 W, cooler, +3.7 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg +90 W, cooler, +3.5 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg +85 W, cooler, +3.3 pp
AIKO-A635-MAE72Mw 635 W 24.60% -0.260 27.0 kg +80 W, cooler, +3.1 pp
AIKO-A630-MAH72Dw 630 W 24.40% -0.260 32.5 kg +75 W, cooler, +2.9 pp

Found 2327 panels of the same or similar size to this one, within ±10 mm. See them here Found 2369 panels of the same or similar size to this one, within ±25 mm. See them here Found 2383 panels of the same or similar size to this one, within ±50 mm. See them here Found 2548 panels of the same or similar size to this one, within ±100 mm. See them here

About the YLM 3.0 Pro 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 Pro 1 panel?
The top variant of the YLM 3.0 Pro 1 series reaches up to 555 Wp. The panel is built with 144 monocrystalline PERC cells in a half-cut layout, delivering high efficiency within a standard module format. This means each panel produces more energy per roof area than older full-cell designs.
Are Yingli YLM 3.0 Pro 1 panels suitable for a sloped residential roof?
Yes, the series works well both in larger commercial installations and in residential prosumer systems on sloped roofs. The half-cut cell layout improves shading tolerance, which matters on roofs with chimneys, dormers, or nearby trees. The durable laminate construction also supports safe mounting on standard roof racking systems.
What warranty comes with Yingli YLM 3.0 Pro 1 panels?
Yingli provides a 12-year product warranty and a 30-year linear power warranty. This means the manufacturer guarantees a defined performance level throughout three decades of operation, giving homeowners and commercial buyers a predictable return on investment.
How does PERC cell technology in the YLM 3.0 Pro 1 differ from standard monocrystalline cells?
PERC (Passivated Emitter and Rear Cell) cells feature an extra rear-side passivation layer that reflects unused light back into the cell, boosting efficiency. Combined with half-cut technology and large-format cells, this results in lower internal losses and better module performance under partial shading or elevated operating temperatures.
Is Yingli a tier 1 manufacturer worth trusting for a large investment?
Yes, Yingli is listed as a tier 1 manufacturer, reflecting solid financial standing and a long-established presence in the PV market. Headquartered in China, it is one of the more recognized solar panel suppliers worldwide, which simplifies warranty service and spare parts availability for larger commercial or agricultural projects.
Do YLM 3.0 Pro 1 panels have a positive power tolerance?
Yes, the series offers positive power tolerance, meaning the actual output never falls below the rated nameplate value. For installers and investors, this ensures predictable energy yield without the risk of receiving an underperforming unit from a given production batch.
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